Microwave (e.g., 2.45 Gigahertz, Etc.) Patents (Class 264/432)
  • Patent number: 10940635
    Abstract: Methods and systems are provided for heating a dielectric preform material. An exemplary method includes inserting the preform material into a microwave cavity along a longitudinal axis of the microwave cavity and supplying the microwave cavity with microwave power having a frequency that corresponds to an axial wavelength along the longitudinal axis of the microwave cavity. The axial wavelength is greater than a length of the preform material along the longitudinal axis. The method includes heating the preform material within the microwave cavity by the microwave power and determining temperatures of the preform material at one or more locations on a surface of the preform material. The method further includes adjusting, based on the temperatures of the preform material, the microwave frequency to achieve substantially uniform heating at least on a sidewall of the preform material along the longitudinal axis.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: March 9, 2021
    Assignee: MKS Instruments, Inc.
    Inventors: Xing Chen, David Lam, Kevin W. Wenzel, Ilya Pokidov
  • Patent number: 9950450
    Abstract: An embodiment is a molding chamber. The molding chamber comprises a mold-conforming chase, a substrate-base chase, a first radiation permissive component, and a microwave generator coupled to a first waveguide. The mold-conforming chase is over the substrate-base chase, and the mold-conforming chase is moveable in relation to the substrate-base chase. The first radiation permissive component is in one of the mold-conforming chase or the substrate-base chase. The microwave generator and the first waveguide are together operable to direct microwave radiation through the first radiation permissive component.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: April 24, 2018
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Jing-Cheng Lin, Chen-Hua Yu, Shin-Puu Jeng, Jui-Pin Hung, Hsien-Wen Liu
  • Patent number: 9657207
    Abstract: A method of making shaped ceramic abrasive particles includes cutting a layer of ceramic precursor material using a laser beam and forming shaped ceramic precursor particles. Further thermal processing provides shaped ceramic abrasive particles. Shaped ceramic abrasive particles producible by the methods and abrasive articles containing them are also disclosed.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: May 23, 2017
    Assignee: 3M Innovative Properties Company
    Inventors: Dennis G. Welygan, Charles J. Studiner, IV, Dwight D. Erickson
  • Patent number: 9505654
    Abstract: A method for strengthening a glass article. The method includes exposing a selected area of the glass article to a beam of electromagnetic radiation in order to diffuse first alkali metal ions in the selected area out of the glass article and to diffuse second alkali metal ions on a surface of the glass article and in the selected area into the glass article. The second alkali metal ions are larger than the first alkali metal ions. The beam of electromagnetic radiation heats first alkali metal ions and the second alkali metal ions to a temperature that is greater than that of a glass network of the glass article.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: November 29, 2016
    Assignee: Gyrotron Technology, Inc.
    Inventors: Vladislav Sklyarevich, Mykhaylo Shevelev
  • Patent number: 9299939
    Abstract: A method, and the resulting structure, of making a CMOS device from carbon nanotube substrate, where a carbide contact is formed in a source drain region. The carbide is formed prior to the gate structure by reacting a glassy carbon and a metal.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: March 29, 2016
    Assignee: International Business Machines Corporation
    Inventors: Qing Cao, Shu-Jen Han
  • Patent number: 9033703
    Abstract: The invention relates to a dental furnace wherein a firing chamber is heated up in a first heating-up period at a first heating-up rate of more than 50° K/min, in particular more than 100° K/min, which heats the furnace to at least 1000° C., in particular to 1100-1250° C. The first heating-up period is followed by an intermediate heating period, which is at least five minutes long, in particular at least ten minutes long, the gradient or heating-up rate of which is adapted to the material to be sintered in the dental furnace (10), and wherein this is followed by an end heating-up period (44) during which heating up is effected at a heating-up rate of more than 30° K/min, in particular approximately 50° K/min, and wherein during this the furnace temperature is held for at least five minutes, in particular for at least 25 minutes, above the temperature toward the end of the first heating-up period, and wherein forced cooling of the furnace (10) is performed after this.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: May 19, 2015
    Assignee: Ivoclar Vivadent AG
    Inventors: Gottfried Rohner, Walter Pokorny, Robert Grünenfelder, Frank Rothbrust
  • Publication number: 20150061191
    Abstract: The present disclosure relates to substrates for use in microwave plasma reactors. Certain substrates include a cylindrical disc of a carbide forming refractory metal having a flat growth surface on which CVD diamond is to be grown and a flat supporting surface opposed to said growth surface. The cylindrical disc may have a diameter of 80 mm or more. The growth surface may have a flatness variation no more than 100 mm The supporting surface may have a flatness variation no more than 100 mm.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 5, 2015
    Inventors: Carlton Nigel Dodge, Paul Nicolas Inglis, Geoffrey Alan Scarsbrook, Timothy Peter Mollart, Charles Simon James Pickles, Steven Edward Coe, Joseph Michael Dodson, Alexander Lamb Cullen, John Robert Brandon, Christopher John Howard Wort
  • Patent number: 8951597
    Abstract: The present invention provides a functionally graded glass/ceramic/glass sandwich system especially useful in damage resistant, ceramic dental and orthopedic prosthesis. The functionally graded glass/substrate/glass composite structure comprises an outer (aesthetic) residual glass layer, a graded glass-ceramic layer, and a dense interior ceramic. The functionally graded glass/substrate/glass composite structure may further comprise a veneer on an exterior surface. The present invention also provides a method for preparing a functionally graded glass/ceramic/glass sandwich system. A powdered glass-ceramic composition or a glass tape is applied to the accessible surfaces of a dense alumina substrate to thereby substantially cover the substrate surfaces. The glass of the composition has a CTE similar to that of the substrate material. The glass-ceramic composition is infiltrated into the dense substrate by heating the assembly to temperatures 50-700° C. below the sintering temperature of the substrate.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: February 10, 2015
    Assignee: New York University
    Inventors: Yu Zhang, Jae-Won Kim, Van P. Thompson
  • Publication number: 20140327186
    Abstract: Systems and methods for rapid drying of ceramic greenwares having a high graphite content are disclosed. The methods include employing microwave drying to bring the dryness of the ceramic greenware to a first select dryness and then employing close-coupled hot-air drying to bring the dryness to the final target dryness. The judicious use of close-coupled hot-air drying reduces end defects due to unevenness in the microwave drying process while also substantially speeding up the drying process. Various configurations for and combinations of microwave drying and close-coupled hot-air drying are disclosed.
    Type: Application
    Filed: March 31, 2014
    Publication date: November 6, 2014
    Applicant: Corning Incorporated
    Inventors: Willard Ashton Cutler, James Anthony Feldman, Jacob George, Amit Halder, Nadezhda Pavlovna Paramonova, Todd Parrish St Clair
  • Patent number: 8815327
    Abstract: The present invention provides a functionally graded glass/ceramic/glass sandwich system for use in damage resistant, ceramic and orthopedic prosthesis. The functionally graded glass/substrate/glass composite structure comprises an outer residual glass layer, a graded glass-ceramic layer, and a dense interior ceramic. The functionally graded glass/substrate/glass composite structure may further comprise a veneer on an exterior surface. The present invention also provides a method for preparing a functionally graded glass/ceramic/glass sandwich system. A powdered glass-ceramic composition is applied to the accessible surfaces of a presintered zirconia substrate to thereby substantially cover the substrate surfaces. The glass of the composition has a CTE similar to that of the substrate material. The glass-ceramic composition is infiltrated into and densifies the substrate by heating the assembly to at least the sintering temperature of the substrate.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: August 26, 2014
    Assignee: New York University
    Inventors: Yu Zhang, Jae-Won Kim
  • Patent number: 8778295
    Abstract: Disclosed is a combinatorial synthesis of Diamond wherein a first reactive species is produced by catalytic treatment of Acetylene, a second reactive species is produced by decomposition of a hydrocarbon source having a low Hydrogen-to-Carbon ratio using a high energy discharge, and the two reactive species so obtained are combined in the vapor phase to yield Diamond without the need of post-treatments. The reaction is efficient and affords Diamond under mild conditions with high purity such that it may be useful for producing Diamond for semiconductor and microelectronics applications.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: July 15, 2014
    Inventor: Daniel Hodes
  • Publication number: 20140034364
    Abstract: Disclosed are methods or manufacturing a metal wiring buried flexible substrate by using plasma and flexible substrates manufactured by the same. The method includes pre-treating a substrate by irradiating the plasma on the surface of the substrate (Step 1), forming a metal wiring on the pre-treated substrate in Step 1 (Step 2), forming a metal wiring buried polymer layer by coating a curable polymer on the substrate including the metal wiring formed thereon in Step 2 and curing (Step 3), and separating the polymer layer formed in Step 3 from the substrate in Step 1 (Step 4), The metal wiring may be inserted into the flexible substrate, and the resistance of the wiring may be decreased. The metal wiring may be clearly separated from the substrate, and impurities on the substrate surface may be clearly removed. The flexible substrate may be easily separated by applying only physical force.
    Type: Application
    Filed: July 30, 2012
    Publication date: February 6, 2014
    Applicant: KOREA INSTITUTE OF MACHINERY AND MATERIALS
    Inventors: Jae Wook Kang, Do Geun Kim, Jong Kuk Kim, Sung Hun Jung, Seunghun Lee
  • Publication number: 20130221578
    Abstract: Tray assemblies and methods for manufacturing ceramic articles are provided. In one embodiment, a tray assembly includes a tray body having a supporting surface operable to support a ceramic article for passage through a microwave drying apparatus during a microwave drying process and a microwave coupling cover associated with the tray body. The microwave coupling cover envelopes at least a portion of the ceramic article during the microwave drying process. The microwave coupling cover has a dielectric property such that a greater percentage of microwave energy is coupled into the ceramic article with the microwave coupling cover present during the microwave drying process than with the microwave coupling cover not present. Methods may include rotating the ceramic article when the ceramic article is about 40%-60 dry.
    Type: Application
    Filed: March 15, 2013
    Publication date: August 29, 2013
    Applicant: Corning Incorporated
    Inventors: James Anthony Feldman, Jacob George, Nadezhda Pavlovna Paramonova, Michael Dean Seymour
  • Patent number: 8506873
    Abstract: The invention relates to a method for producing a fiber composite component, comprising the steps: introduction of a first body (12), consisting of fibers and a matrix material, into a mold (10), said first body (12) having a continuous first body edge (18); the first body (12) is irradiated with microwaves (28) to produce a fiber-composite component. According to the invention, the first body (12) is introduced into the mold (10) in such a way that at least parts of the first body edge (18) are brought into contact with the mold (10).
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: August 13, 2013
    Assignee: Airbus Operations GmbH
    Inventors: Rainer Graeber, Maksim Podkorytov, Matthias Meyer, Lars Herbeck
  • Patent number: 8449854
    Abstract: According to some embodiments, a method of preparing a superhard material involves using mixtures of boron with carbon nitride of C3N4 stoichiometry as precursors. The C3N4 may be nanospherical. The result of chemical interaction of these components is the formation of new ternary compound B—C—N compound with a cubic structure. According to some embodiments, the composition is BCxN, where x is about 0.5. According to some embodiments, the composition is BCxN, where x is about 0.2. According to some embodiments, the compound has a unit cell parameter a=3.645±0.005 ?. According to some embodiments, the unit cell parameter a is about 3.655 ?. Synthesis is carried out under the conditions of thermodynamic stability of diamond at pressures higher that 6.0 GPa and temperatures above 1000° C. The starting components are taken according to the following ratio: boron—20-60 wt. %, C3N4—40-80 wt. %.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: May 28, 2013
    Assignee: William Marsh Rice University
    Inventors: Valery N. Khabashesku, Vladimir P. Filonenko, Valeri A. Davydov
  • Patent number: 8349040
    Abstract: The present invention relates to polycrystalline ultra hard material cutting elements, and more particularly to a method of forming a polycrystalline ultra hard material cutting element with a thicker ultra hard layer than cutting elements formed by prior art methods. In an exemplary embodiment, such a method includes pre-sintering the ultra hard material powder to form an ultra hard material layer that is partially or fully densified prior to HPHT sintering, so that the ultra hard layer is pre-shrunk. This pre-sintering in an exemplary embodiment is achieved by means of a spark plasma process, or in another exemplary embodiment by a microwave sintering process.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: January 8, 2013
    Assignee: Smith International, Inc.
    Inventor: Federico Bellin
  • Publication number: 20130004798
    Abstract: In one aspect of the present invention, a method of for synthesizing compression- and aggregation-resistant particles includes forming a graphene dispersion solution with micron-sized graphene-based material sheets, nebulizing the graphene dispersion solution to form aerosol droplets, passing the aerosol droplets through a horizontal tube furnace pre-heated at a predetermined temperature by a carrier gas, and drying the aerosol droplets to concentrate and compress the micron-sized graphene-based material sheets into crumpled particles of sub-micron scale.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 3, 2013
    Applicant: NORTHWESTERN UNIVERSITY
    Inventors: Jiaxing Huang, Hee Dong Jang, Jiayan Luo
  • Publication number: 20120168232
    Abstract: An insert for a drill bit and method of making an insert is disclosed herein. An insert has a grip region, a cutting extension having a cutting surface, and at least one implant embedded in the cutting extension, wherein the cutting extension comprises a first carbide material and the implant comprises a second carbide material, and wherein the second carbide material has a hardness that is greater than the first carbide material.
    Type: Application
    Filed: November 9, 2011
    Publication date: July 5, 2012
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Zhou Yong, Sike Xia, Jianhui Xu
  • Publication number: 20120086153
    Abstract: A manufacturing method of a ceramic fired body includes forming a composition of ceramic raw material containing water to make a ceramic molded body. The ceramic molded body is irradiated with a microwave under a depressurized atmosphere of about 1 KPa or more and about 50 kPa or less to dry the ceramic molded body. The ceramic molded body is fired to make the ceramic fired body.
    Type: Application
    Filed: September 23, 2011
    Publication date: April 12, 2012
    Applicant: IBIDEN CO., LTD.
    Inventors: Ryoichi KUDO, Tsubasa Sonoo, Tadafumi Ohashi, Yuji Haga
  • Publication number: 20120088123
    Abstract: Provided are a process for economically preparing a graphene shell having a desired configuration which is applicable in various fields wherein in the process the thickness of the graphene she can be controlled, and a graphene shell prepared by the process.
    Type: Application
    Filed: December 1, 2011
    Publication date: April 12, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-young CHOI, Hyeon-Jin SHIN, Seon-mi YOON
  • Publication number: 20120049415
    Abstract: Methods and apparatus for microwave drying of green cellular ceramic bodies (logs) using feedback and feed forward control are disclosed. The methods include measuring an amount of dissipated microwave power and measuring temperatures of the logs and inputting this information into a drying model. The drying model accounts for at least a heat capacitance, a water content and a mass of the logs, and relates changes in the dissipated microwave power to changes in the log temperature. The changes in microwave power generated by the adjustable microwave source are thus based on the calculated dissipated power changes.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 1, 2012
    Inventors: Jacob George, Parasuram Padmanabhan Harihara, Min Shen
  • Publication number: 20110308755
    Abstract: Described is a procedure for layered composition of models, whereby at least a first material is applied to an assembly platform, followed by selective application of a second material layer; these two application steps are repeated until the required model is achieved and both materials form a solid structure in an appropriate mixture ratio. The first material comprises a moulding sand; the first and/or second material comprises a bonding agent encompassing a salt-crystal binder and/or protein binder.
    Type: Application
    Filed: August 18, 2011
    Publication date: December 22, 2011
    Applicant: VOXELJET TECHNOLOGY GMBH
    Inventor: Rainer Hochsmann
  • Patent number: 8075829
    Abstract: There is provided a method for drying a honeycomb formed article 1. The method has the first step, where an unfired honeycomb formed article 1 having a plurality of cells separated by partition walls made from raw material composition containing a ceramic raw material, water, and a binder is heated and dried by microwave drying or dielectric drying, and a second step, where the honeycomb formed article 1 is dried by hot air drying, where hot air whose humidity was adjusted to have a wet-bulb temperature of 50 to 100° C. using a hot air drying apparatus 11 after the first step is passed through the cells. The method can dry a honeycomb formed article in a shorter period of time with inhibiting generation of a defect such as a deformation or breakage.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: December 13, 2011
    Assignee: NGK Insulators, Ltd.
    Inventors: Shuichi Takagi, Yasuhiro Horiba
  • Patent number: 7955547
    Abstract: The inventive method for forming articles from foaming polymers and compositions based thereon consists in forming articles using a heat energy released by water exposed to the action of microwave radiation al n temperature equal to or less than 170° C., wherein said temperature is attained, controlled and limited by adjusting a vapor pressure in a forming chamber. The inventive device for carrying out said method comprises a forming chamber, which is made of a microwave transparent material, filled with the mixture of prefoamed or granulated foaming polymer or a composition based thereon with water and is placed in a microwave radiation producing channel, and a unit for equalizing a pressure in said forming chamber. The forming chamber and the body thereof made of a microwave non-transparent material are provided with air holes, which are also used for connecting the forming chamber to the pressure equalizing unit.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: June 7, 2011
    Assignee: ZAO “Elefom’
    Inventors: Andrey Nikolaevich Plaksunov, Igor Nikolaevich Golubev
  • Publication number: 20110111945
    Abstract: A tungsten carbide material for use in precision glass molding applications having 6.06-6.13 wt. % carbon, 0.20-0.55 wt. % grain growth inhibitor, less than 0.25 wt. % binder, less than 0.6% wt. % impurities, and balance being tungsten. The tungsten carbide material has a nominal grain size of less than 0.5 microns.
    Type: Application
    Filed: November 10, 2009
    Publication date: May 12, 2011
    Applicant: Kennametal Inc.
    Inventors: Elizabeth Ann Binky Peterson, William Roy Huston, Irene Spitsberg, Michael James Verti, Sudhir Brahmandam
  • Publication number: 20110070129
    Abstract: A honeycomb filter includes cell walls and cells. The cell walls extend along a longitudinal direction of the honeycomb filter to define the cells between the cell walls. The cells have first cells and second cells each having a substantially square shape in a cross-section perpendicular to the longitudinal direction. The first cells are sealed and the second cells are open at one end face of the honeycomb filter. The substantially square shape of the first cells includes a first side whose extended line intersects a second side except for corner portions of the substantially square shape of the second cells. The second side and the extended line of the first side are substantially perpendicular.
    Type: Application
    Filed: December 3, 2010
    Publication date: March 24, 2011
    Applicant: IBIDEN CO., LTD.
    Inventors: Kazushige OHNO, Koji SHIMATO, Masahiro TSUJI
  • Publication number: 20110020168
    Abstract: A method of fabricating a porous metal-based biomaterial, the method includes dispersing microwave susceptors into organic solvent to form a homogeneous suspension, dispersing bioactive fillers into organic solvent to form a homogeneous solution, mixing metal powder with the homogeneous solution and the homogeneous suspension to form a mixture, cold-pressing the mixture into a compact with predefined shape and size, placing the compact in a sintering container, and emitting microwave to heat the compact and remove the organic solvent resided in the compact at the same time.
    Type: Application
    Filed: July 22, 2009
    Publication date: January 27, 2011
    Inventors: Chak Yin Tang, Su Ping Bao, Chi Pong Tsui, Tai Man Yue
  • Patent number: 7862764
    Abstract: Electromagnetic (EM) drying of a plugged ware is provided that includes subjecting the ware to an axially non-uniform EM radiation field that causes more EM radiation to be dissipated in either of the plugged regions than in the unplugged region. The EM radiation field is provided by a configurable applicator system that includes a feed waveguide and a conveyor path. The feed waveguide includes configurable slots. The configurable applicator system can be set to selectively vary the amount of EM radiation dissipated by each ware along the longitudinal axis of each ware as a function of ware position along the conveying path, thereby enhancing the EM drying process.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: January 4, 2011
    Assignee: Corning Incorporated
    Inventors: James Anthony Feldman, Jacob George, Kevin Robert McCann, Rebecca Lynn Schulz, Gary Graham Squier, Elizabeth Marie Vileno
  • Patent number: 7820950
    Abstract: The invention relates to a pressure-sensitive supporting material, which can be (intrinsically) heated by an inner heat source, and to the use thereof. The heatable supporting material is characterized in that the supporting material comprises a pressure-sensitive adhesive layer inside of which heat is generated. The pressure-sensitive adhesive layer is a pressure-sensitive adhesive compound, which can be heated by electric current, induction, a chemical reaction or by a physical phase transition. The heatable supporting material has a high heating capacity and is suited for producing pressure-sensitive tapes for adhering heatable mirrors.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: October 26, 2010
    Assignee: tesa SE
    Inventors: Klaus Keite-Telgenbüscher, Stephan Zöllner, Marco Kupsky, German Patino, Olaf Gōrbig
  • Publication number: 20100083645
    Abstract: The invention relates to a process for obtaining a structure made from a porous ceramic material comprising at least 95% of silicon carbide SiC, said process being characterized in that said structure is obtained from a mixture of SiC grains comprising at least: a first fraction of ?-SiC grains whose median diameter is less than 5 microns; a second fraction of ?-SiC grains whose median diameter is at least two times greater than that of the first fraction of ?-SiC grains and whose median diameter is greater than or equal to 5 microns; and a fraction of ?-SiC grains or of at least a precursor of ?-SiC grains. The invention also relates to the porous structure obtained according to the process.
    Type: Application
    Filed: December 13, 2007
    Publication date: April 8, 2010
    Applicant: SAINT-GOBAIN CTR DE RCH ET D'ETUDES EUROPEEN
    Inventors: Patricia Andy, Caroline Tardivat, Damien Mey, Ahmed Marouf
  • Publication number: 20100078859
    Abstract: There is provided a method for drying a honeycomb formed article 1. The method has the first step, where an unfired honeycomb formed article 1 having a plurality of cells separated by partition walls made from raw material composition containing a ceramic raw material, water, and a binder is heated and dried by microwave drying or dielectric drying, and a second step, where the honeycomb formed article 1 is dried by hot air drying, where hot air whose humidity was adjusted to have a wet-bulb temperature of 50 to 100° C. using a hot air drying apparatus 11 after the first step is passed through the cells. The method can dry a honeycomb formed article in a shorter period of time with inhibiting generation of a defect such as a deformation or breakage.
    Type: Application
    Filed: August 7, 2009
    Publication date: April 1, 2010
    Applicant: NGK INSULATORS, LTD.
    Inventors: Shuichi TAKAGI, Yasuhiro HORIBA
  • Patent number: 7596885
    Abstract: A method for drying a ceramic article comprises providing microwave radiation from a microwave generating source, providing a ceramic honeycomb structure having a middle portion and at least one end, and exposing the ceramic honeycomb structure to the microwave radiation while shielding the at least one end from directly receiving the microwave radiation, such that the radiation absorbed by the middle portion is equal to or greater than the radiation absorbed by the at least one end, and the proper drying of the entire honeycomb structure without heat-induced structural degradation is thus ensured.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: October 6, 2009
    Assignee: Corning Incorporated
    Inventors: Paul Andreas Adrian, James Anthony Feldman, Jacob George, Elizabeth Marie Vileno
  • Publication number: 20090148652
    Abstract: Diamond SPM and AFM probes which are durable, particularly for scanning hard surfaces such as diamond surfaces. Interlayers and seeding can be used to improve diamond deposition, and the diamond can be ultrananocrystalline diamond (UNCD). Tip sharpening improves resolution.
    Type: Application
    Filed: July 11, 2008
    Publication date: June 11, 2009
    Inventors: John A. Carlisle, Nicolaie Moldovan
  • Publication number: 20090098365
    Abstract: Nanocrystalline sintered bodies, and a method of making same, said sintered bodies based on a 95 to 100% content of alpha-aluminum oxide by weight, a Vickers hardness greater than or equal to 17.5 GPa, and a crystal structure where the average primary crystal size of the alpha-aluminum oxide is less than or equal to 100 nanometers.
    Type: Application
    Filed: July 12, 2006
    Publication date: April 16, 2009
    Applicant: Center for Abrasives and Refractories Research & Developement C.A.R.R.D. GmbH
    Inventor: Paul Moeltgen
  • Publication number: 20090079101
    Abstract: The present invention relates to an arrangement for sintering a ceramic body, the arrangement including: an applicator defining a monomode microwave heating chamber; a thermal insulation structure disposed within the chamber; a susceptor disposed within the thermal insulation structure having a lower microwave coupling temperature than the ceramic body; the ceramic body arranged adjacent to the susceptor; a magnetron; and a temperature measurement device. Related methods are also described.
    Type: Application
    Filed: April 28, 2008
    Publication date: March 26, 2009
    Inventors: Jurgen Laubersheimer, Pieter Luypaert, Christian Ritzberger, Jozef Vleugels, Wolfram Holand, Carlo Groffils, Volker Rheinberger
  • Publication number: 20090014918
    Abstract: A method and apparatus is provided for forming an in-mold cured brake pad (16). A mold (24) includes sidewalls (28) through which a window (24) made from a generally lossless material such as alumina is formed. Microwaves (42) are directed through the window (46) and into the die cavity (26) of the mold (24) to provide supplemental heating and thereby accelerate the manufacturing cycle time. The friction material composition is tuned by adding an effective quantity of titania or other suitable agent which has the advantage of moving the absorption band for the heat-curable material into the standard band (50) of the microwaves (42) produced by a low-cost magnetron (40), and also of self-regulating the absorption characteristics of the heat-curable material so as to reduce or eliminate the tendency to thermal runaway.
    Type: Application
    Filed: July 10, 2007
    Publication date: January 15, 2009
    Inventors: Yuliu Zheng, Myron Schmenk
  • Patent number: 7476356
    Abstract: Firing of ceramic cores (1) is important in order to achieve manufacturing processes. These ceramic cores (1) are generally formed in a “green” state which has limited mechanical strength and may be distorted during the firing process by non-uniform thermal effects, etc. By providing a tube or containment 2 which is located on a saggar base 3 and surrounded by firing media 4, it is possible to achieve an initial pre-firing step whereby the “green” state core 1 is located through a stem 1a in an initial partial depth 5 of firing media 4 in the tube or containment 2 until it achieves a sufficient mechanical strength to enable positional adjustment. Thus, the green core will be pre-fired in a kiln solely supported through the stem 1a and then the core adjusted using a tool such as an engineering rule.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: January 13, 2009
    Assignee: Rolls-Royce plc
    Inventors: Jamie C McGourlay, Bhupendra A Prajapati
  • Publication number: 20080258348
    Abstract: Electromagnetic (EM) drying of a plugged ware is provided that includes subjecting the ware to an axially non-uniform EM radiation field that causes more EM radiation to be dissipated in either of the plugged regions than in the unplugged region. The EM radiation field is provided by a configurable applicator system that includes a feed waveguide and a conveyor path. The feed waveguide includes configurable slots. The configurable applicator system can be set to selectively vary the amount of EM radiation dissipated by each ware along the longitudinal axis of each ware as a function of ware position along the conveying path, thereby enhancing the EM drying process.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 23, 2008
    Inventors: James Anthony Feldman, Jacob George, Kevin Robert McCann, Rebecca Lynn Schulz, Gary Graham Squier, Elizabeth Marie Vileno
  • Publication number: 20080099180
    Abstract: The invention relates to a moulding mixture for producing casting moulds for metalworking, a process for producing casting moulds, casting moulds obtained by the process and also their use. To produce the casting moulds, a refractory mould raw material and a binder based on water glass are used. A proportion of a particulate metal oxide selected from the group consisting of silicon dioxide, aluminium oxide, titanium oxide and zinc oxide is added to the binder. Particular preference is given to using synthetic amorphous silicon dioxide as metal oxide.
    Type: Application
    Filed: September 2, 2005
    Publication date: May 1, 2008
    Inventors: Gunter Weicker, Diether Koch, Jens Muller, Udo Skerdi, Henning Rehse, Anton Gienic, Reinhard Stotzel, Thomas Dunnwald
  • Patent number: 7320183
    Abstract: The invention provides a honeycomb formed structure drying method including causing undried honeycomb formed structures 10 placed on stands 12 to pass through a drying apparatus 1, thereby drying the undried honeycomb formed structures through high-frequency heating, to thereby form dried honeycomb formed structures 11; removing the dried honeycomb formed structures 11 from the stands 12; cooling the stands 12 which have been heated dried in the drying apparatus 1 are cooled to a temperature lower than the gelation temperature of the undried honeycomb formed structures 10; placing newly formed undried honeycomb formed structures 10 on the cooled stands 12; drying the undried honeycomb formed structures by passing through the drying apparatus 1; and repeating these operations. The honeycomb formed structure drying method prevents deformation such as warpage of partition walls of honeycomb formed structures during drying thereof.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: January 22, 2008
    Assignee: NGK Insulators, Ltd.
    Inventors: Takeyuki Ishii, Yuji Asai, Makoto Nakajo
  • Patent number: 7273580
    Abstract: Process for heating a substrate, which contains, relative to the total weight of the substrate, 0.1 to 70 wt. % of metallic, magnetic, ferrimagnetic, ferromagnetic, antiferromagnetic or superparamagnetic particles having an average particle size of between 1 and 5000 nm, wherein the substrate is exposed to electromagnetic radiation, characterized in that the electromagnetic radiation comprises microwave radiation with a frequency in the range from 1 to 300 GHz and the substrate is simultaneously exposed to a direct-current magnetic field, the field strength of which is at least twice the strength of the earth's magnetic field; use of the process for producing or detaching adhesive bonds; device for the simultaneous production of microwave radiation with a frequency within the range from 1 to 300 GHz and a direct-current magnetic field, the field strength of which is at least twice the strength of the earth's magnetic field.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: September 25, 2007
    Assignee: Henkel Kommanditgesellschaft auf Aktien (Henkel KGAA)
    Inventors: Christian Kirsten, Marcel Roth, Olaf Lammerschop, Hans-Martin Sauer
  • Patent number: 7153465
    Abstract: There are disclosed inventions relating to tubular hybrid metal/ceramic composites and the methods of making them wherein the ceramic chosen has a lower thermal expansion than that of the metal.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: December 26, 2006
    Assignee: Thor Technologies, Inc.
    Inventors: Stuart T. Schwab, Kevin W. Dudek
  • Patent number: 6932932
    Abstract: Method of fabricating at least a honeycomb body include drying a plurality of honeycomb bodies, each having a multiplicity of cells arranged in the shape of a honeycomb and having a wall thickness of 0.125 mm or less, without cracking or wrinkling in the outer peripheral skin portion of the mold. Extrusion-molded argillaceous honeycomb bodies may be dried by placement on porous ceramics trays, having a dielectric loss of 0.1 or less, a porosity of 10% or more and a sectional open area ratio of 50% or more, exposure to at least 70% humidity and simultaneous irradiation with microwaves of 1,000 to 10,000 MHz. Alternatively, extrusion-molded argillaceous honeycomb bodies may be dried by exposure to at least 70% humidity and simultaneous irradiation with microwaves of 1,000 to 10,000 MHz, after which hot air is passed through the cells of the honeycomb bodies.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: August 23, 2005
    Assignee: Denso Corporation
    Inventors: Yasunao Miura, Satoru Yamaguchi, Hiromi Katou
  • Patent number: 6878337
    Abstract: A process for producing a honeycomb structure, which comprises adding water to a mixed raw material of a raw material powder and a binder, kneading the mixture to obtain a plastic mixture, molding the plastic mixture into a honeycomb shape to obtain a green honeycomb structure, drying the structure by a step including hot-air drying, and firing the resulting dried honeycomb structure, wherein the binder contains hydroxypropyl methyl cellulose as a major component. The process can produce a crack-free high-quality honeycomb structure rapidly at a low cost.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: April 12, 2005
    Assignee: NGK Insulators, Ltd.
    Inventors: Yasushi Noguchi, Kyoko Makino
  • Patent number: 6824727
    Abstract: A SiAlON-based ceramic particularly suited for use as a cutting tool in the high speed chip forming machining of metals composed of a SiAlON matrix including a) a phase of alpha′ SiAlON represented by the general formula of Mx (Si,Al)12(O,N)16, wherein 0<x<2 and M is at least two cationic elements, a first cationic element being 0.2 to 4 weight percent Mg and optionally between 0.5 and 15 weight percent of one or more of Ca, Sr, and Ba calculated as oxide, based on the SiAlON matrix, and a second cationic element being one or more of Y, Sc, La and the rare earth (RE) elements; b) a phase consisting of beta′ SiAlON represented by the general formula Si6−zAl2OzN8−z wherein 0<z<4.2; and c) a component containing glass, and at least one additional intergranular crystal phase that is detectable using X-ray diffraction techniques is provided.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: November 30, 2004
    Assignee: Indexable Cutting Tools of Canada Limited
    Inventors: Robert Donald Roy, David Allan
  • Patent number: 6709622
    Abstract: A method of fabricating nanostructures containing isotropically distributed, interconnected pores having cross-sectional diameters in the nanometer and Angstrom range by integrating the steps of attriting precursor nanometer-sized particulate materials, desorbing the exposed surfaces of the attrited nanoparticulates, adsorbing a surfactant on 25-50% of the desorbed surfaces and dispersing the surfactant-coated nanoparticulates in an organic matrix to form a homogeneous thermoplastic compound from which green nanostructures are formed, dewaxed and sintered to the desired degree of microporosity.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: March 23, 2004
    Inventors: Romain Billiet, Hanh T. Nguyen
  • Patent number: 6706233
    Abstract: The method for heating a plurality of ceramic bodies, includes: a) providing ceramic-forming raw materials and blending the raw materials with an effective amount of vehicle and forming aids to form a plastic mixture therefrom and thereafter forming the plastic raw material mixture into a plurality of green bodies; b) placing each one of the plurality of green bodies in proximity to an adjacent one of the plurality of green bodies such that upon heating with electromagnetic waves each green body is subject to no more than about 1.5 times the power density at the boundary than in the bulk thereof; and c) drying the green bodies utilizing energy in the form of electromagnetic waves. When the ceramic is a honeycomb cellular cordierite body, the method further includes heating the green bodies up to a maximum temperature of between about 1360° C. and about 1435° C.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: March 16, 2004
    Assignee: Corning Incorporated
    Inventors: Carlos R. Araya, John H. Brennan, Gary G. Squier, Kathleen A. Wexell, Elizabeth M. Vileno
  • Publication number: 20030222378
    Abstract: A series of paraffin compounds, the phase change materials (PCMs), were microencapsulated in an interfacial polymerization process to form the double-shell microcapsules with relatively low shell permeability. The inner shell is formed through the reaction between polypropylene glycols and bifunctional polyisocyanates and the outer through the reaction between bifunctional polyisocyanates and polyamines added in the continuous aqueous phase. The so prepared microencapsulated paraffin compounds emulsion can be used as the medium for temperature management in many fields.
    Type: Application
    Filed: May 28, 2002
    Publication date: December 4, 2003
    Inventors: Jiangwei Xing, Yi Li, Edward Newton, Kwok-Wing Yeung
  • Publication number: 20030209838
    Abstract: A method of making a ceramic composite wherein a polymeric ceramic precursor or fiber reinforcement infiltrated with a polymeric ceramic precursor is associated with at least one metallic element to form a preceramic composite and the said composite is pyrolyzed by high frequency microwave radiation, preferably in the form of a beam, until the polymeric ceramic precursor is converted into a ceramic having the at least one metallic element integrally formed as part of said ceramic.
    Type: Application
    Filed: August 14, 2001
    Publication date: November 13, 2003
    Inventors: Stuart T. Schwab, Thomas W. Hardek, Joel D. Katz
  • Patent number: 6610241
    Abstract: Certain embodiments relate to a process for forming a multilayer electrical device. The process includes providing a multilayer structure including layers of a dielectric material and an electrode material. The electrode material may include at least one material selected from the group consisting of nickel and copper. A variety of dielectric materials may be used, such as barium titanate. The method also includes sintering the dielectric material by heating the structure using microwaves in an industrial nitrogen atmosphere, which contains an oxygen partial pressure of 10−2 to 10−12 atm.
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: August 26, 2003
    Assignee: The Penn State Research Foundation
    Inventors: Thomas R. Shrout, Dinesh Agrawal, Balasubramaniam Vaidhyanathan