Nonsilica And Nonsilicate Crystalline Phase (e.g., Spinel, Barium Titanate, Etc.) Patents (Class 501/10)
-
Patent number: 7015161Abstract: Provided is a substrate for information recording medium composed of such a crystallized glass as having high Young's modulus, strength and heat resistance, being excellent in surface smoothness, surface homogeneity and surface processability, as well as having a relatively low temperature of glass liquid phase and being capable of producing cheaply, and an information recording medium using this substrate. The crystallized glass substrate for information recording medium comprising 35–65 mol % of SiO2, 5–25 mol % of Al2O3, 10–40 mol % of MgO and 5–15 mol % of TiO2, in which the total amount of aforementioned composition is at least equal to or higher than 92 mol % and the main crystals are enstatite and/or its solid solution. The information recording medium having this substrate and a recording layer formed on said substrate.Type: GrantFiled: March 18, 2005Date of Patent: March 21, 2006Assignee: Hoya CorporationInventor: Xuelu Zou
-
Patent number: 7015160Abstract: Glass powder for a dielectric material has a nature that, when fired, diopside (CaMgSi2O6) and at least one of titanite (CaTi(SiO4)O) and titania (TiO2) are precipitated. Preferably, the glass powder has a composition including SiO2, CaO, MgO, and TiO2 and the total content of these components is 80 mass % or more. Preferably, the glass powder comprises, by mass percent, 35–65% SiO2, 10–30% CaO, 10–20% MgO, and 12–30% TiO2.Type: GrantFiled: February 18, 2005Date of Patent: March 21, 2006Assignee: Nippon Electric Glass Co., Ltd.Inventors: Yoshikatsu Nishikawa, Yoshio Umayahara
-
Patent number: 7008892Abstract: An optical fiber has a fiber core with a higher refractive index and a cladding surrounding the core with a lower refractive index. The fiber core is made of a multi-component oxide glass composition which consists of a glass-forming component and two Raman-active components. The glass former is SiO2 and the Raman active components are of Li2O and Nb2O5. The concentration of the glass former is between 30 and 90 mol % and of the Raman active components is up to 50 mol % in total. The composition may further include a glass-modifying component of alkaline such as Li2O, Na2O, K2O, Rb2O, Cs2O or earth-alkaline such as BeO, MgO, CaO, SrO, BaO in a concentration of up to 40 mol %.Type: GrantFiled: July 11, 2003Date of Patent: March 7, 2006Assignee: AlcatelInventors: Ekaterina Bourova, Stephanie Blanchandin, Jérome Garapon
-
Patent number: 6984261Abstract: The invention relates to uses of glasses and glass-ceramics in dental and orthodontic applications.Type: GrantFiled: February 5, 2003Date of Patent: January 10, 2006Assignee: 3M Innovative Properties CompanyInventors: Kevin M. Cummings, Jacqueline C. Rolf, Anatoly Z. Rosenflanz, Richard P. Rusin, Jerome E. Swanson
-
Patent number: 6979661Abstract: A birefringent glass composed of a phase-separated glass is provided. The phase-separated glass includes a borosilicate glass in which fluorine and a constituent that tends to crystallize into a high refractive index phase as a consequence of phase separation are included. In one embodiment, the constituent comprises TiO2.Type: GrantFiled: May 28, 2004Date of Patent: December 27, 2005Assignee: Corning IncorporatedInventors: Nicholas F. Borrelli, George B. Hares, Mark L. Powley, Joseph F. Schroeder
-
Patent number: 6960399Abstract: Enclosed are crystallized glasses suitable for a substrate for an information recording medium such as a magnetic disc, optical disc, or optomagnetic disc, a substrate for information recording medium using such a crystallized glass substrate, and an information recording medium using such a substrate for information recording medium. The crystallized glasses are capable of providing a glass substrate having a high Young's modulus, as well as excellent mechanical strength, surface flatness, and heat resistance and having an excellent surface smoothness upon polishing. Glass substrate having an excellent surface smoothness using such a crystallized glass are also disclosed.Type: GrantFiled: June 23, 2004Date of Patent: November 1, 2005Assignee: Hoya CorporationInventors: Xuelu Zou, Kouji Azegami
-
Patent number: 6953756Abstract: A glass ceramic sintered body containing gahnite and cordierite as crystal phases, having a thermal expansion coefficient at 40 to 400° C. of not larger than 5×10?6/° C., a dielectric constant of not larger than 7 and a Young's modulus of not larger than 150 GPa. A wiring board having an insulating substrate made of the glass ceramic sintered body features very high reliability in the primary mounting and in the secondary mounting.Type: GrantFiled: October 22, 2003Date of Patent: October 11, 2005Assignee: Kyocera CorporationInventors: Shinya Kawai, Toshifumi Higashi
-
Patent number: 6936555Abstract: Disclosed is a substantially transparent glass-ceramic ceramic, and a method for making a glass-ceramic, exhibiting an aluminogallate spinel crystal phase and having a glass-ceramic composition that lies within the SiO2—Al2O3—ZnO—K2O—Ga2O3—Na2O system and particularly consisting essentially, in weight percent on an oxide basis, of 25-50% SiO2, 15-45% ZnO, 0-26% Al2O3, 0-25% K2O, 0-10% Na2O, 0-32% Ga2O3, a K2O+Na2O amount of greater than 10%, a Al2O3+Ga2O3 of greater than 10%, the glass ceramic microstructure containing a crystal phase comprising at least 15%, by weight, of hexagonal ZnO crystals. Another aspect disclosed is optical element selected from the group consisting of an optical fiber, a gain or laser medium, and an amplifier component, a saturable absorber, with the element comprising a transparent glass-ceramic of the same composition and containing a crystallinity of at least about 15% by weight of hexagonal ZnO crystals.Type: GrantFiled: December 29, 2003Date of Patent: August 30, 2005Assignee: Corning IncorporatedInventor: Linda R. Pinckney
-
Patent number: 6924245Abstract: A glass ceramic composition which can be fired at a low temperature and which has a high dielectric constant, a relatively small thermal expansion coefficient and a small temperature coefficient of dielectric constant is provided. The glass ceramic composition contains about 5% to 75% by weight of TiO2 powder, about 5% to 75% by weight of CaTiSiO5 powder and about 15% to 50% by weight of glass powder.Type: GrantFiled: May 21, 2003Date of Patent: August 2, 2005Assignee: Murata Manufacturing Co., Ltd.Inventor: Sadaaki Sakamoto
-
Patent number: 6905988Abstract: Provided is a substrate for information recording medium composed of such a crystallized glass as having high Young's modulus, strength and heat resistance, being excellent in surface smoothness, surface homogeneity and surface processability, as well as having a relatively low temperature of glass liquid phase and being capable of producing cheaply, and an information recording medium using this substrate. The crystallized glass substrate for information recording medium comprising 35-65 mol % of SiO2, 5-25 mol % of Al2O3, 10-40 mol % of MgO and 5-15 mol % of TiO2, in which the total amount of aforementioned composition is at least equal to or higher than 92 mol % and the main crystals are enstatite and/or its solid solution. The information recording medium having this substrate and a recording layer formed on said substrate.Type: GrantFiled: July 3, 2003Date of Patent: June 14, 2005Assignee: Hoya CorporationInventor: Xuelu Zou
-
Patent number: 6897171Abstract: The present invention refers to glass-ceramics consisting of the mixtures (I): ZrO2—SiO2—MeIIO, or (II) SiO2—MeIIIO2—MeIIO, wherein: MeII is chosen in the group consisting of: Ca, Ba, Mg, Zn or mixture thereof; MeIII is chosen in the group consisting of Al, B or mixtures thereof; each of the above said constituents being present in determined quantities; the invention refers also to a process for preparing the glass-ceramics above defined; porcelain stonewares and glazes containing them and their use for preparing ceramic items.Type: GrantFiled: June 12, 2003Date of Patent: May 24, 2005Assignee: Colorobbia Italia S.p.A.Inventors: Marco Bitossi, Giovanni Baldi, Davide Settembre Blundo, Enrico Generali
-
Patent number: 6875715Abstract: Glass powder for a dielectric material has a nature that, when fired, diopside (CaMgSi2O6) and at least one of titanite (CaTi(SiO4)O) and titania (TiO2) are precipitated. Preferably, the glass powder has a composition including SiO2, CaO, MgO, and TiO2 and the total content of these components is 80 mass % or more. Preferably, the glass powder comprises, by mass percent, 35-65% SiO2, 10-30% CaO, 10-20% MgO, and 12-30% TiO2.Type: GrantFiled: March 4, 2003Date of Patent: April 5, 2005Assignee: Nippon Electric Glass Co., Ltd.Inventors: Yoshikatsu Nishikawa, Yoshio Umayahara
-
Patent number: 6872331Abstract: An oxide ion conductor is manufactured having a relatively high mechanical strength while the ionic conduction thereof is maintained at a satisfactory level. The oxide ion conductor is represented by the formula Ln11-xAxGa1-y-z-wB1yB2zB3wO3-d. In the oxide ion conductor, Ln1 is at least one element selected from the group consisting of La, Ce, Pr, Nd, and Sm, A is at least one element selected from the group consisting of Sr, Ca, and Ba, B1 is at least one element selected from the group consisting of Mg, Al, and In, B2 is at least one element selected from the group consisting of Co, Fe, Ni, and Cu, and B3 is at least one element selected from the group consisting of Al, Mg, Co, Ni, Fe, Cu, Zn, Mn, and Zr, wherein x is 0.05 to 0.3, y is 0.025 to 0.29, z is 0.01 to 0.15, w is 0.01 to 0.15, y+z+w is 0.035 to 0.3, and d is 0.04 to 0.3.Type: GrantFiled: August 4, 2003Date of Patent: March 29, 2005Assignee: Mitsubishi Materials CorporationInventors: Kiyoshi Kuroda, Takashi Yamada, Yoshitaka Tamo, Kazunori Adachi
-
Patent number: 6849334Abstract: Nanoscale particles, particle coatings/particle arrays and corresponding consolidated materials are described based on an ability to vary the composition involving a wide range of metal and/or metalloid elements and corresponding compositions. In particular, metalloid oxides and metal-metalloid compositions are described in the form of improved nanoscale particles and coatings formed from the nanoscale particles. Compositions comprising rare earth metals and dopants/additives with rare earth metals are described. Complex compositions with a range of host compositions and dopants/additives can be formed using the approaches described herein. The particle coating can take the form of particle arrays that range from collections of disbursable primary particles to fused networks of primary particles forming channels that reflect the nanoscale of the primary particles. Suitable materials for optical applications are described along with some optical devices of interest.Type: GrantFiled: March 15, 2002Date of Patent: February 1, 2005Assignee: NeoPhotonics CorporationInventors: Craig R. Horne, Pierre J. DeMascarel, Christian C. Honeker, Benjamin Chaloner-Gill, Herman A. Lopez, Xiangxin Bi, Ronald J. Mosso, William E. McGovern, James T. Gardner, Sujeet Kumar, James A. Gilliam, Vince Pham, Eric Euvrard, Shivkumar Chiruvolu, Jesse Jur
-
Patent number: 6818155Abstract: Coupling components to an underlying substrate using a composition of a polymer and magnetic material particles. Upon applying the composition between the component and the printed circuit board, the composition may be subjected to a magnetic field to align the magnetic material particles into a conductive path between the component and the underlying substrate. At the same time the polymer-based material may be cured or otherwise solidified to affix the conductive path formed by the magnetic material particles.Type: GrantFiled: January 2, 2002Date of Patent: November 16, 2004Assignee: Intel CorporationInventors: George Hsieh, Terrance J. Dishongh, Norman J. Armendariz, David V. Spaulding
-
Publication number: 20040167006Abstract: The invention relates to a bioactive rhenanite glass ceramic which is characterized by a high content of P2O5, CaO and Na2O and is particularly suitable as bone replacement material in dentistry.Type: ApplicationFiled: February 12, 2004Publication date: August 26, 2004Inventors: Elke Apel, Wolfram Holand, Volker Rheinberger
-
Publication number: 20040158330Abstract: The invention relates to a metallic implant, which has vitreous-crystalline bioactive material on the surface thereof. According to the invention, a metallic implant base body arranged on the surface of the particles has a bioactive, vitreous-crystalline material consisting of 15-45 wt. % CaO, 40-45 wt. % P2O5, 10-40 wt. % ZrO2 and 0.7-3.5 wt. % fluoride, having apatite and calcium zirconium phosphate as main crystalline and a glass phase as an auxiliary component. Said vitreous crystalline material contains at least 35 wt. % main crystal phases and at least 5-15 wt. % auxiliary compounds. All of the percentage data is expressed in relation to the total weight of the vitreous crystalline material and the particle size of the vitreous crystalline material is between 60-350 &mgr;m.Type: ApplicationFiled: December 15, 2003Publication date: August 12, 2004Inventors: Wolf-Dieter Mller, Georg Berger
-
Publication number: 20040148870Abstract: Al2O3—La2O3—Y2O3—MgO ceramics (including glasses, crystalline ceramics, and glass-ceramics) and methods of making the same. Ceramics according to the present invention can be made, formed as, or converted into glass beads, articles (e.g., plates), fibers, particles, and thin coatings. The particles and fibers are useful, for example, as thermal insulation, filler, or reinforcing material in composites (e.g., ceramic, metal, or polymeric matrix composites). The thin coatings can be useful, for example, as protective coatings in applications involving wear, as well as for thermal management. Some embodiments of ceramic particles according to the present invention can be are particularly useful as abrasive particles.Type: ApplicationFiled: February 5, 2003Publication date: August 5, 2004Applicant: 3M Innovative Properties CompanyInventors: Ahmet Celikkaya, Thomas J. Anderson
-
Patent number: 6767854Abstract: The invention refers to a material which is chemically long-term stable in a neutral or slightly acid environment and which can be used both as bioactive bone replacement material, e.g. in the form of a coating applied onto metallic prosthesis sticks by thermal spraying, and as substrate material in biotechnology, e.g. in the form of a ceramic sheet. According to the invention, said material comprises 15-45% by weight CaO, 40-45% by weight P2O5, 10-40% by weight ZrO2 and fluoride, said material further comprises two crystalline phases being apatite and calcium zirconium phosphate, and a secondary glass phase. Said material has a very high chemical long-term stability, compared to known materials which can also be produced by means of a melting process.Type: GrantFiled: June 13, 2002Date of Patent: July 27, 2004Assignee: Bam Bundesanstalt fuer Materialforschung und PrufungInventors: Georg Berger, Ute Ploska
-
Publication number: 20040142809Abstract: Disclosed is a substantially transparent glass-ceramic ceramic, and a method for making a glass-ceramic, exhibiting an aluminogallate spinel crystal phase and having a glass-ceramic composition that lies within the SiO2—Al2O3—ZnO—K2O—Ga2O3—Na2O system and particularly consisting essentially, in weight percent on an oxide basis, of 25-50% SiO2, 15-45% ZnO, 0-26% Al2O3, 0-25% K2O, 0-10% Na2O, 0-32% Ga2O3, a K2O+Na2O amount of greater than 10%, a Al2O3+Ga2O3 of greater than 10%, the glass ceramic microstructure containing a crystal phase comprising at least 15%, by weight, of hexagonal ZnO crystals. Another aspect disclosed is optical element selected from the group consisting of an optical fiber, a gain or laser medium, and an amplifier component, a saturable absorber, with the element comprising a transparent glass-ceramic of the same composition and containing a crystallinity of at least about 15% by weight of hexagonal ZnO crystals.Type: ApplicationFiled: December 29, 2003Publication date: July 22, 2004Inventor: Linda R. Pinckney
-
Patent number: 6753070Abstract: An insulating ceramic compact is provided which can be obtained by low-temperature firing, has a low relative dielectric constant and superior high frequency characteristics, and can be co-sintered with a material having a high coefficient of thermal expansion. The insulating ceramic compact is a fired mixture of an MgAl2O4-based ceramic and a borosilicate glass, in which an MgAl2O4 crystal phase and at least one of an Mg3B2O6 crystal phase and an Mg2B2O5 crystal phase are precipitated as primary crystal phases.Type: GrantFiled: July 11, 2001Date of Patent: June 22, 2004Assignee: Murata Manufacturing Co., Ltd.Inventors: Naoya Mori, Yasutaka Sugimoto, Osamu Chikagawa
-
Patent number: 6740259Abstract: A method of manufacture of a ceramic material comprises the steps of preparing a melt of the ceramic materials, cooling the melt slowly through the freezing point of the material to initiate solidification, holding the melt at a temperature below the freezing point of the material whilst solidification progresses and characterised in that during solidification an ultrasonic field is applied to the melt. The melt composition may be selected to include an excess of one or more ceramic materials so as to produce a second phase dispersed in the solidified product during solidification. Also claimed is a ceramic material produced by the method described. The ceramic material may be a superconductor.Type: GrantFiled: November 8, 2001Date of Patent: May 25, 2004Assignee: Qinetiq LimitedInventors: Jonathan C Fitzmaurice, David R Moore
-
Publication number: 20040087427Abstract: A glass ceramic sintered body containing gahnite and cordierite as crystal phases, having a thermal expansion coefficient at 40 to 400° C. of not larger than 5×10−6/° C., a dielectric constant of not larger than 7 and a Young's modulus of not larger than 150 GPa. A wiring board having an insulating substrate made of the glass ceramic sintered body features very high reliability in the primary mounting and in the secondary mounting.Type: ApplicationFiled: October 22, 2003Publication date: May 6, 2004Applicant: KYOCERA CORPORATIONInventors: Shinya Kawai, Toshifumi Higashi
-
Publication number: 20030228967Abstract: The present invention refers to glass-ceramics consisting of the mixtures (I): ZrO2—SiO2—MeIIO, or (II) SiO2—MeIIIO2—MeIIO, wherein: MeII is chosen in the group consisting of: Ca, Ba, Mg, Zn or mixture thereof; MeIII is chosen in the group consisting of Al, B or mixtures thereof; each of the above said constituents being present in determined quantities; the invention refers also to a process for preparing the glass-ceramics above defined; porcelain stonewares and glazes containing them and their use for preparing ceramic items.Type: ApplicationFiled: June 12, 2003Publication date: December 11, 2003Inventors: Marco Bitossi, Giovanni Baldi, Davide Settembre Blundo, Enrico Generali
-
Patent number: 6649549Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.Type: GrantFiled: April 2, 2001Date of Patent: November 18, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
-
Patent number: 6645891Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.Type: GrantFiled: April 2, 2001Date of Patent: November 11, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
-
Patent number: 6645890Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.Type: GrantFiled: April 2, 2001Date of Patent: November 11, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
-
Patent number: 6645888Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.Type: GrantFiled: April 2, 2001Date of Patent: November 11, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
-
Patent number: 6645889Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.Type: GrantFiled: April 2, 2001Date of Patent: November 11, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
-
Patent number: 6645892Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.Type: GrantFiled: April 2, 2001Date of Patent: November 11, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
-
Publication number: 20030205467Abstract: There are provided glass-ceramics having a high lithium ion conductivity which include in mol %: 1 P2O5 38-40% TiO2 25-45% M2O3 (where M is Al or Ga) 5-15% Li2O 10-20%Type: ApplicationFiled: June 16, 2003Publication date: November 6, 2003Inventor: Jie Fu
-
Patent number: 6642161Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.Type: GrantFiled: April 2, 2001Date of Patent: November 4, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
-
Patent number: 6642162Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.Type: GrantFiled: April 2, 2001Date of Patent: November 4, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
-
Patent number: 6641941Abstract: The invention provides a film of an yttria-alumina complex oxide having a high peel strength with respect to a substrate. A mixture of powdery yttria and alumina materials is sprayed on a substrate to form a sprayed yttria-alumina complex oxide film. Preferably, the powdery yttria material has a 50 percent mean particle diameter in a range of 0.1 &mgr;m to 100 &mgr;m, and the powdery alumina material has a 50 percent mean particle diameter in a range of 0.1 &mgr;m to 100 &mgr;m. Preferably, the yttria-alumina complex oxide contains at least garnet phase, and may further contain perovskite phase.Type: GrantFiled: July 17, 2002Date of Patent: November 4, 2003Assignee: NGK Insulators, Ltd.Inventors: Hirotake Yamada, Tsuneaki Ohashi
-
Patent number: 6635591Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.Type: GrantFiled: April 2, 2001Date of Patent: October 21, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
-
Patent number: 6632758Abstract: Disclosed is a substantially transparent glass-ceramic ceramic, and a method for making a glass-ceramic, exhibiting an aluminogallate spinel crystal phase and having a glass-ceramic composition that lies within the SiO2—Ga2O3—Al2O3—K2O—Na2O— system and particularly consisting essentially, in weight percent on an oxide basis, of 25-55% SiO2, 9-50% Ga2O3, 7-33% Al2O3, 0-20% K2O, 0-15% Na2O, 0-6 Li2O and 5-30% K2O+Na2O, the glass ceramic microstructure containing a crystal phase comprising at least 5%, by weight, of aluminogallate spinel crystals. Another aspect disclosed is optical element selected from the group consisting of an optical fiber, a gain or laser medium, and an amplifier component, a saturable absorber, with the element comprising a transparent glass-ceramic of the same composition and containing a crystallinity of at least about 5% by weight of aluminogallate spinel crystals.Type: GrantFiled: May 2, 2002Date of Patent: October 14, 2003Assignee: Corning IncorporatedInventors: George H. Beall, Linda R. Pinckney, Bryce N. Samson
-
Patent number: 6627567Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 35 to 60 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO and from 0.1 to 1.8 wt % of P2O5.Type: GrantFiled: July 13, 2000Date of Patent: September 30, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
-
Patent number: 6624101Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 51 to 57.5 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 0.1 to 6.8 wt % of TiO2.Type: GrantFiled: July 13, 2000Date of Patent: September 23, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
-
Patent number: 6620747Abstract: A low-temperature-sintering apatite glass ceramic is described which is characterized by a high chemical stability, a low coefficient of expansion as well as high translucency and which is particularly suitable on its own or together with glasses or other glass ceramics as coating or veneering material for ceramic dental restorations.Type: GrantFiled: June 22, 2001Date of Patent: September 16, 2003Assignee: Ivoclar Vivadent AGInventors: Marcel Schweiger, Volker Rheinberger, Wolfram Höland
-
Publication number: 20030166448Abstract: Glass powder for a dielectric material has a nature that, when fired, diopside (CaMgSi2O6) and at least one of titanite (CaTi(SiO4)O) and titania (TiO2) are precipitated. Preferably, the glass powder has a composition including SiO2, CaO, MgO, and TiO2 and the total content of these components is 80 mass % or more. Preferably, the glass powder comprises, by mass percent, 35-65% SiO2, 10-30% CaO, 10-20% MgO, and 12-30% TiO2.Type: ApplicationFiled: March 4, 2003Publication date: September 4, 2003Applicant: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Yoshikatsu Nishikawa, Yoshio Umayahara
-
Patent number: 6610620Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 48 to 54.8 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 2.4 to 10 wt % of Li2O.Type: GrantFiled: July 13, 2000Date of Patent: August 26, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
-
Patent number: 6605554Abstract: The present invention refers to glass-ceramics consisting of the mixtures (I): ZrO2—SiO2—MeIIO, or (II) SiO2—MeIIIO2—MeIIO, wherein: MeII is chosen in the group consisting of: Ca, Ba, Mg, Zn or mixture thereof; MeIII is chosen in the group consisting of Al, B or mixtures thereof; each of the above said constituents being present in determined quantities; the invention refers also to a process for preparing the glass-ceramics above defined; porcelain stonewares and glazes containing them and their use for preparing ceramic items.Type: GrantFiled: February 7, 2000Date of Patent: August 12, 2003Assignee: Colorobbia Italia S.p.A.Inventors: Marco Bitossi, Giovanni Baldi, Davide Settembre Blundo, Enrico Generali
-
Patent number: 6596659Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 35 to 50 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 2.6 to 8 wt % of Li2O.Type: GrantFiled: July 13, 2000Date of Patent: July 22, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
-
Patent number: 6593259Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 54.5 to 59.5 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 3 to 12 wt % of Li2O.Type: GrantFiled: July 13, 2000Date of Patent: July 15, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
-
Patent number: 6585951Abstract: Methods for manufacturing a powder of a dielectric compound include mixing particle components that are combinable to form the dielectric compound with matrix components. The mixture is melted, and the molten mixture is quenched to produce a solid material. The dielectric power is extracted from the solid material. A molar ratio of particle components to matrix components can be selected so that the solid material produced by quenching is amorphous. Particle components can be selected to produce Ba1−xSrxTiO3 powder, wherein 0≦x≦1. Matrix components consist essentially of Na2O·2B2O3 and Na2O·SiO2·9H2O or can be selected from a group consisting of zinc oxide, zinc carbonate, and zinc hydroxide.Type: GrantFiled: October 30, 2000Date of Patent: July 1, 2003Assignee: Idaho Research Foundation, Inc.Inventors: Yang-Ki Hong, Mun-Hyoun Park
-
Patent number: 6583077Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 50.5 to 56 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 4.2 to 10.6 wt % of TiO2.Type: GrantFiled: July 13, 2000Date of Patent: June 24, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
-
Patent number: 6583078Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 47.5 to 58 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 0.1 to 2.8 wt % of ZrO2.Type: GrantFiled: July 13, 2000Date of Patent: June 24, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
-
Patent number: 6579818Abstract: Disclosed is a glass ceramic sintered product which contains as crystal phases: (i) a gahnite crystal phase; (ii) a celsian crystal phase containing needle-like crystals having an aspect ratio of not smaller than 3; and (iii) at least one kind of crystal phase selected from the group consisting of AlN, Si3N4, SiC, Al2O3, ZrO2, 3Al2O3.2SiO2 and Mg2SiO4; and has an open porosity of not larger than 0.3%. The glass ceramic sintered product is highly strong, has a high heat conductivity, a high Young's modulus, is dense, and can be produced through the firing at a low temperature of not higher than 1000° C., and is very useful as an insulating substrate that has wiring layers of a low-resistance conductor such as Cu, Ag or Au on the surface thereof or in the inside thereof.Type: GrantFiled: August 28, 2001Date of Patent: June 17, 2003Assignee: Kyocera CorporationInventors: Shinya Kawai, Masanari Kokubu, Yoshitake Terashi
-
Patent number: 6573206Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 47.5 to 52.5 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 6.2 to 7.8 wt % of TiO2.Type: GrantFiled: July 13, 2000Date of Patent: June 3, 2003Assignee: Minolta Co., Ltd.Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
-
Patent number: 6572955Abstract: High-frequency ceramics containing SiO2, Al2O3, MgO, ZnO and B2O3 as constituent components, said ceramics comprising: 30 to 50% by weight of a crystal phase containing ZnO and Al2O3; 5 to 15% by weight of a crystal phase containing SiO2 and MgO; and 40 to 60% by weight of an amorphous phase comprising substantially SiO2 or SiO2 and B2O3; wherein the content of the SiO2 crystal phase is suppressed to be not larger than 6% by weight. The ceramics has a dielectric loss at 60 GHz of not larger than 15×10−4, exhibiting excellent high-frequency characteristics, and is very useful as an insulating substrate for the wiring boards that deal with high-frequency signals.Type: GrantFiled: April 27, 2001Date of Patent: June 3, 2003Assignee: Kyocera CorporationInventors: Yoshitake Terashi, Masahiro Tomisako, Satoshi Hamano, Kazuyoshi Kodama, Katsuhiko Onitsuka