And Divalent Metal Oxide (e.g., Oxides Of Zinc, Cadmium, Beryllium, Alkaline Earth Metal, Magnesium, Etc.) Patents (Class 501/69)
Calcium oxide containing (Class 501/70)
  • Glass composition for poling and glass functional product containing the same
    Patent number: 7285510
    Abstract: The present invention provides a glass composition suitable for producing a poling effect. This glass composition includes 0.001 to 0.5 mol % of univalent metal ions in terms of oxide thereof, 0.1 to 40 mol % of Al2O3, and 0 to 15 mol % of B2O3, and a ratio of the number of moles of Al2O3 to a sum of moles of oxide in terms of which the univalent metal ions is expressed is at least 1.0. As the univalent metal ions are suitable Li, Na, K, Cs, Ag, Cu, and Au.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: October 23, 2007
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Koichi Sakaguchi, Shigeki Nakagaki
  • Glass flake
    Patent number: 7285508
    Abstract: The present invention provides a glass flake that is substantially free of boron trioxide (B2O3), barium oxide (BaO), zinc oxide (ZnO), and fluorine (F) and has sufficient heat resistance and good formability for glass flake. The glass flake of the present invention includes a glass composition that contains the following components, expressed in mol %; 50?SiO2?65; 4?Al2O3<12; 5?SrO?25; 10<(MgO+SrO)?30; 20?(MgO+CaO+SrO)?45; and 0<(Li2O+Na2O+K2O)<2; wherein the glass composition is substantially free of B2O3, BaO, ZnO, and F. This glass flake is useful for resin compositions, paints, cosmetics, ink compositions, and the like.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: October 23, 2007
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Kosuke Fujiwara, Akihiro Koyama
  • Glass compositions having high thermal and chemical stability and methods of making thereof
    Publication number: 20070191207
    Abstract: Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs). In accordance with certain of its aspects, the glasses possess good dimensional stability as a function of temperature.
    Type: Application
    Filed: February 9, 2007
    Publication date: August 16, 2007
    Inventors: Paul S. Danielson, Adam J.G. Ellison, Natesan Venkataraman
  • Clad glass composition for graded-index rod lens, graded-index rod lens, and method for manufacturing the same
    Patent number: 7250383
    Abstract: It is an object of the present invention to provide a clad glass composition for graded-index rod lens for covering, during manufacturing, a preform glass composition lens of a graded-index rod lens that does not include PbO, in which the composition substantially does not include PbO, and expressed in mol % includes SiO2: 45 to 65, Na2O: 3 to 30, K2O: 0 to 10, MgO: 0 to 15, BaO: 0 to 20, where Na2O+K2O: 3 to 35 and MgO+BaO: 0 to 25, and furthermore includes B2O3: 0 to 15, ZnO: 0 to 10, TiO2: 0 to 10, Y2O3: 0 to 7, ZrO2: 0 to 7, Nb2O5: 0 to 7, In2O3: 0 to 7, La2O3: 0 to 7, Ta2O5: 0 to 10, where B2O3+ZnO+TiO2+Y2O3+ZrO2+Nb2O5+In2O3+La2to 20, and a content of at least one of TiO2 and La2O3 is substantially 0 mol %.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: July 31, 2007
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Teruhide Inoue, Kunihiro Nomiyama, Yoshikazu Toshikiyo, Yukihito Nagashima
  • Optical glass suffering little change in refractive index by radiation of light
    Patent number: 7217672
    Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: May 15, 2007
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Akira Masumura, Muneo Nakahara, Satoru Matsumoto, Tatsuya Senoo
  • Low alkali sealing frits, and seals and devices utilizing such frits
    Patent number: 7214441
    Abstract: A solid oxide fuel cell device incorporates a sealing material resistant to hydrogen gas permeation at a sealing temperature in the intermediate temperature range of 600° C.–900° C., the seal having a CTE in the 100×10?7/° C. to 120×10?7/° C., wherein the sealing material comprises in weight %, of: (i) a 80 wt % to 100 wt % glass frit, the glass frit itself having a composition comprising in mole percent of: SiO2 15–65; Li2O 0–5; Na2O 0–5; K2O 0–10; MgO 0–5; CaO 0–32; Al2O3 0–10; B2O3 0–50; SrO 0 to 25, wherein the total amount of alkalis is less than 10 mole %; and (ii) zirconia or leucite addition 0 wt % to 30 wt.
    Type: Grant
    Filed: February 3, 2005
    Date of Patent: May 8, 2007
    Assignee: Corning Incorporated
    Inventors: Jeffrey Earl Cortright, Lisa Ann Lamberson, Pamela Arlene Maurey, Robert Michael Morena
  • Optical glass suffering little change in refractive index by radiation of light
    Patent number: 7196027
    Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43 W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: March 27, 2007
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Akira Masumura, Muneo Nakahara, Satoru Matsumoto, Tatsuya Senoo
  • Sealing materials and devices utilizing such materials
    Patent number: 7189470
    Abstract: A solid oxide fuel cell device incorporates a sealing material resistant to hydrogen gas permeation at a sealing temperature in the intermediate temperature range of 600° C.–800° C., the seal having a CTE in the 100×10?7/° C. to 120×10?7/° C., wherein the sealing material comprises in weight %, of: (i) a 80 to 95 wt % of glass frit, the glass frit itself having a composition in mole percent of: SiO2 70–85%; Al2O3 0–5%; Na2O3 0–8%; K2O 10–25%; ZnO 0–10%; ZrO2 0–6%; MgO 0–7%; TiO2 0–2%; and (ii) and 5 wt % to 25 wt % of addition comprising at least one of: alumina, zirconia or leucite.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: March 13, 2007
    Assignee: Corning Incorporated
    Inventors: Jeffrey E Cortright, Lisa A Lamberson, Pamela A Maurey, Robert M Morena
  • Glass compositions
    Patent number: 7189671
    Abstract: Improved glass fibers compositions, typically useful for fire resistant blankets or containers to provide high burn-through resistance at high temperatures of 2,400° F. and higher, and typically comprising silica, sodium oxide, potassium oxide, calcium oxide, magnesium oxide, ferrous+ferric oxide, and titanium oxide; the improved glass compositions may further include alumina, lithium oxide, and boron oxide.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: March 13, 2007
    Assignee: Glass Incorporated
    Inventor: Albert Lewis
  • Leucite glass ceramic doped with nanoscale metal oxide powder, method for producing the same, and dental materials and dental products formed therefrom
    Patent number: 7172649
    Abstract: The disclosure relates to a leucite glass ceramic doped with nanoscale metal oxide, to a doped leucite glass ceramic powder suitable for its production, to a method for producing the doped leucite glass ceramic, to its use as dental material, to a dental product containing it and to the use of the nanoscale metal oxide powders for the production of the doped glass ceramic or of the doped leucite glass ceramic powder.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: February 6, 2007
    Assignees: Chemichl AG
    Inventors: Thomas Conrad, Gerhard Meyer
  • Aluminosilicate glass
    Patent number: 7169470
    Abstract: A short optical glass is disclosed which does not comprise any silver, copper, thallium, lead or boron and is particularly suited for the application imaging, projection, telecommunication, optical information technology, and/or laser technology, also particularly suited for fiber applications (light guides or imaging guides). Preferably the glass has a refractive index of 1.55?nd?1.65 and an Abbe coefficient of 48?vd?57 and also has good attenuating and ion exchange characteristics, good chemical stability and good crystallization stability. The glass comprises 35 to <50 wt.-% SiO2; 1 to 10 wt.-% Al2O3; 5 to 15 wt.-% Na2O+K2O+CS2O+Li2O; 20 to 30 wt.-% BaO; 0 to 15 wt.-% ZnO; 0 to 10 wt.-% La2O3; 0 to 10 wt.-% ZrO2; 0 to 6 wt.-% P2O5; 0 to 8 wt.-% MgO+CaO+SrO; 0 to 3 wt.-% of other oxides, and Cs2O<1, Li2O<1, and TiO2<1 wt.-%.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: January 30, 2007
    Assignee: Schott AG
    Inventors: Silke Wolff, Ute Woelfel, Uwe Kolberg, Holger Kasprzik
  • Zinc oxide-alumina-silica-based crystallized glass
    Patent number: 7169476
    Abstract: A zinc oxide-alumina-silica-based crystallized glass is provided, containing zinc oxide, alumina and silica as main components, and zirconia as a nucleating agent. The main components are provided in a ratio of 20–30% by mass of zinc oxide, 15–25% by mass of alumina and 50–60% by mass of silica to amount to 100% by mass in total. The nucleating agent is contained in an amount of 3–6 parts by mass based on 100 parts by mass of the main components. The crystallized glass also includes at least one modification component selected from the group consisting of lithium oxide, sodium oxide, potassium oxide, diphosphorus pentoxide, niobium oxide and tantalum oxide in addition to the main components and the nucleating agent.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: January 30, 2007
    Assignees: NGK Insulators, Ltd., NGK Optoceramics Co., Ltd.
    Inventors: Takashi Ota, Kazuki Ootou
  • Glass sheet designed to be heat tempered
    Patent number: 7153798
    Abstract: The subject of the invention is a glass sheet intended to be thermally toughened, the matrix of which is of the silica-soda-lime type, having an expansion coefficient ? of greater than 100×10?7 K?1, a Young's modulus E of greater than 60 GPa and a thermal conductivity k of less than 0.9 W/m.K.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: December 26, 2006
    Assignee: Saint-Gobain Glass France
    Inventors: Frederic Bordeaux, Lucas Duffrene
  • Flat float glass
    Patent number: 7141521
    Abstract: This invention relates to a flat float glass that can be prestressed or transformed into a glass ceramic with high quartz mixed crystals or keatite mixed crystals. To eliminate undesirable surface defects during floating and to achieve superior characteristics of the glass or of the glass ceramic, in particular with regard to a low coefficient of thermal expansion and high light transmittance, the glass has a concentration of less than 300 ppb Pt, less than 30 ppb Rh, less than 1.5 wt. % ZnO and less than 1 wt. % SnO2, and is refined during melting without the use of the conventional fining agents arsenic oxide and/or antimony oxide.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: November 28, 2006
    Assignee: Schott Glas
    Inventors: Friedrich Siebers, Peter Nass, Gerhard Lautenschläger, Otmar Becker
  • Process for producing alkali-free aluminosilicate glass
    Patent number: 7137278
    Abstract: The process of the invention produces alkali-free aluminosilicate glass having an Al2O3-content of more than 12% by weight with the addition of from 0.005% by weight to 0.6% by weight of sulfate for batch formulation.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: November 21, 2006
    Assignee: Schott AG
    Inventors: Franz Ott, Karin Naumann, Otmar Becker, Ralf Diezel
  • Glass for a light filter and a light filter
    Patent number: 7101625
    Abstract: Glass for a light filter capable of preventing variation of refractive index in a band-pass filter has a coefficient of thermal expansion within a range from 90×10?7/° C. to 120×10?7/° C. within a temperature range from ?20° C. to +70° C. and, preferably, Young's modulus of 75 GPa or over and Vickers hardness of 550 or over, and light transmittance for plate thickness of 10 mm of 90% or over within a wavelength range from 950 nm to 1600 nm.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: September 5, 2006
    Assignee: Kabushiki Kaisha Ohara
    Inventor: Naoyuki Goto
  • Glass-ceramic and its production and use
    Patent number: 7091142
    Abstract: The invention encompasses a glass-ceramic comprising a continuous glass phase and a crystal phase comprising tetragonal leucite, wherein the glass-ceramic has a crack-free glass phase and a crystal phase comprising leucite crystals distributed essentially homogeneously in the glass phase. The crystal phase has a particle size distribution made of from about 5% to about 70% of a first group of leucite crystals having particle sizes of <1 ?m and from about 30% to about 95% of a second group of leucite crystals having particle sizes of ?1 ?m. The proportion of Li2O in the glass-ceramic is preferably below 0.5% by weight. It is preferred that not only the glass phase but also the crystal phase is essentially free of cracks. The corresponding glass-ceramics are particularly suitable for use in the dental sector, in particular as facing ceramics.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: August 15, 2006
    Assignee: Wieland Dental Ceramics GmbH
    Inventors: Steffen Assmann, Peter Appel, Reinhard Armbrust
  • Glass sheet and glass sheet photoelectric converter device
    Patent number: 7087307
    Abstract: The present invention provides a glass sheet formed on molten tin, that exhibits a high transmittance that is originally inherent to its composition. In this glass sheet, the difference between a visible light reflectance of a surface formed in contact with the molten tin and a visible light reflectance of a surface on the opposite side thereof is not greater than 0.25%. And when the glass sheet's thickness is 4 mm, a light transmittance at 540 nm wavelength is at least 91.5%, and a light transmittance at 450 nm wavelength is at least 91.0%, and after irradiating UV light for 6 hours as specified in the radiation-proofing test according to JIS R3212, a light transmittance at 540 nm wavelength is at least 91.0% and a light transmittance at 450 nm wavelength is at least 90.5%.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: August 8, 2006
    Assignee: Nippon Sheet Glass Company, Limited
    Inventors: Yukihito Nagashima, Masahiro Hirata, Akihiro Koyama, Akira Fujisawa
  • Thick film dielectric compositions for use on aluminum nitride substrates
    Patent number: 7087293
    Abstract: The present invention relates to a Cd-free and Pb-free glass composition comprising, based in mol %, 1–10% MO where M is selected from Ba, Sr, Ca and mixtures thereof, 5–30% MgO, 0.3–5% CuO, 0–2.5% P2O5, 0–2.5% ZrO2, 24–45% ZnO, 2–10% Al2O3, 35–50% SiO2 and 0.1–3% A2O where A is selected from the group of alkali elements and mixtures thereof wherein the glass composition is useful in thick paste dielectric materials which are compatible with AlN substrates.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: August 8, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Yong Cho, Kenneth Warren Hang
  • Cerammable mineral glass, glass-ceramic articles and preparation thereof
    Patent number: 7071131
    Abstract: The present invention relates to novel mineral glasses which are cerammable and which have a composition, expressed in percentages by weight of oxides, consisting essentially of: SiO2 65–70; Al2O3 18–20.5; Li2O 2.5–3.8; MgO 0.55–1.5; ZnO 1.2–2.8; BaO 0–1.4; SrO 0–1.4; with BaO+SrO 0.4–1.4; with MgO+BaO+SrO 1.1–2.3; Na2O 0–<1; K2O 0–<1; with Na2O+K2O 0–<1; with ? ? 2.8 ? ? Li 2 ? O + 1.2 ? ZnO 5.2 ? ? MgO > 1.8 ; TiO2 1.8–3.5; ZrO2 0.8–2.5; with ? ? 2.2 < TiO 2 ZrO 2 < 4.5 ; ? preferably ? ? 2.3 < TiO 2 ZrO 2 < 4.5 ; and, optionally, an effective, non-excess amount of at least one fining agent. The present invention also relates to glass-ceramic articles made from such glass as well as processes for making such glass-ceramic articles.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: July 4, 2006
    Assignee: Corning Incorporated
    Inventors: Marie Comte, Eric Papin
  • Colored glass for lighting, colored glass bulb and method for producing thereof
    Patent number: 7049255
    Abstract: The present invention provides colored glass containing no hazardous substances, such as CdS, CdSe and PbCrO4, and used for lamps and covers for lighting, a colored glass bulb with yellow to orange color produced by using said colored glass, and a method for producing said colored glass and said colored glass bulb. Glass composition having a formula of R?2O—RO—SiO2 (wherein R? is an alkali metal element and R is an alkaline earth metal element) is added with 0.01–0.6 of weight ratio of Mo (molybdenum) as MoO3 and 0.01–1.0 of weight ratio of S to obtain the colored glass and the colored glass bulb therefrom. The colored glass having a formula of R?2O—RO—SiO2 is formed to a desired shape to obtain the colored glass bulb, and the shaped hollow article is heated to 400–620° C. to apply a coloring treatment thereto.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: May 23, 2006
    Assignees: Maeda Kogyo Co., LTD, Nippon Electric Glass Co., LTD
    Inventors: Hideki Oyama, Yukio Takagi
  • High refractive index glass beads for high retroreflectivity surfaces
    Patent number: 7045475
    Abstract: Glass formulations, and a method of converting such glass formulations to glass beads having a refractive index of at least 1.59 and a high level of retroreflectivity, are provided. The methods and formulations provide beads also having high levels of resistance to degradation by environmental exposure.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: May 16, 2006
    Assignee: PQ Corporation
    Inventors: Ufuk Senturk, Michael P. Lanci, Raymond Jackson, John W. Lau
  • Thick film dielectric compositions for use on aluminum nitride substrates
    Patent number: 7030048
    Abstract: present invention relates to a Cd-free and Pb-free glass composition comprising, based in mol %, 1–10% MO where M is selected from Ba, Sr, Ca and mixtures thereof, 5–30% MgO, 0.3–5% CuO, 0–2.5% P2O5, 0–2.5% ZrO2, 24–45% ZnO, 2–10% Al2O3, 35–50% SiO2 and 0.1–3% A2O where A is selected from the group of alkali elements and mixtures thereof wherein the glass composition is useful in thick paste dielectric materials which are compatible with AlN substrates.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: April 18, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Yong Cho, Kenneth Warren Hang
  • Glass for fluorescent lamp, glass tube for fluorescent lamp, and fluorescent lamp
    Patent number: 7026753
    Abstract: The present invention provides glass for a fluorescent lamp, comprising: CeO2 of 0.1% to 1.0%, Sb2O3 of 0.05% or lower, SiO2 of 60% to 75%, Al2O3 of 0.5% to 10%, B2O3 of 0% to 5%, CaO of 0% to 8%, MgO of 0% to 8%, SrO of 0% to 15%, BaO of 1% to 12%, R2O of 13% to 22% (R represents Li, Na or K), Fe2O3 of 0% to 0.2%, TiO2 of 0% to 1.0%, and PbO of 0.05% or lower, the percent each being by mass; a glass tube for a fluorescent lamp comprises the above glass; and a fluorescent lamp comprises the above glass tube as an envelope.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: April 11, 2006
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Tsutomu Futagami, Yukio Takagi
  • Glass member resistant to plasma corrosion
    Patent number: 7015163
    Abstract: It is an object of the present invention to provide a glass member resistant against plasma corrosion suitably used as a jig material in producing semiconductors, which exhibits excellent resistance against plasma corrosion, and which is free from the generation of particles. The above problem is solved by a glass member resistant to plasma corrosion, comprising a portion to be exposed to plasma gas, which is made of a glass material containing, as the essential component, one compound component selected from the group consisting of compounds expressed by one of the chemical formulae SiO2—Al2O3—CaO, SiO2—Al2O3—MgO, SiO2—BaO—CaO, SiO2—ZrO2—CaO, SiO2—TiO2—BaO, provided that the constitution ratio of the compound components is within the vitrification range.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: March 21, 2006
    Assignees: Heraeus Quarzglas GmbH & Co. KG, Shin-Etsu Quartz Products Co., Ltd.
    Inventors: Tatsuhiro Sato, Kazuo Koya
  • Crystallized glass for optical filter substrate, and optical filter
    Patent number: 7008891
    Abstract: A crystallized glass for an optical filter substrate, which has an average linear expansion coefficient ?L of from 95×10?7/° C. to 130×10?7/° C. at from ?30° C. to 70° C. and which has a crystal or the like of Na4-xKxAl4Si4O16 (1<x?4) precipitated therein. Further, a crystallized glass for an optical filter substrate, which comprises from 35 to 60% of SiO2, from 10 to 30% of Al2O3, from 1 to 15% of TiO2+ZrO2, from 4 to 20% of Na2O, from 4 to 20% of K2O, from 0.1 to 10% of CaO+SrO+Bao, from 0 to 10% of MgO, etc., and which has ?L of from 95×10?7/° C. to 130×10?7/° C. and which has a crystal or solid solution precipitated therein.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: March 7, 2006
    Assignee: Asahi Glass Company, Limited
    Inventors: Tomoyuki Kobayashi, Kei Maeda, Motoyuki Hirose
  • Glass for a light filter and a light filter
    Patent number: 7005187
    Abstract: Glass for a light filter capable of preventing variation of refractive index in a band-pass filter has a coefficient of thermal expansion within a range from 90×10?7/° C. within a temperature range from ?20° C. to +70° C. and, preferably, Young's modulus of 75 GPa or over and Vickers hardness of 550 or over, and light transmittance for plate thickness of 10 mm of 90% or over within a wavelength range from 950 nm to 1600 nm.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: February 28, 2006
    Assignee: Kabushiki Kaisha Ohara
    Inventor: Naoyuki Goto
  • Low-density glass for flat panel display substrates
    Patent number: 6992030
    Abstract: Disclosed is a glass material essentially free of BaO and alkali oxide particularly suitable for the glass substrate of LCDs. The glass material consists essentially, expressed in mole percent on an oxide basis, of 70–80%, preferably 72–77% of SiO2, 3–9%, preferably 4–7% of Al2O3, 8–18%, preferably 10–16% B2O3, 3–10%, preferably 3–8% of CaO, 0–4%, preferably 0–3% RO, 0–0.2%, preferably 0–0.1% SnO, 0–1%, preferably 0 to 0.5% of XO, where RO represents, collectively, MgO, SrO and ZnO, XO represents, collectively, TiO2, ZrO2, Y2O3 and La2O3. The glass has a strain point in the range of over about 600° C., a coefficient of thermal expansion (CTE) in the range of about 23–35×10?7/° C., a density lower than about 2.35 g/cm3, a liquidus temperature lower than or equal to about 1200° C. and a durability in BHF less than or equal to 0.5 mg/cm2 weight loss.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: January 31, 2006
    Assignee: Corning Incorporated
    Inventor: Thomas E. Paulson
  • Method for producing aluminosilicate glass
    Patent number: 6992031
    Abstract: The invention relates to a method for producing aluminosilicate glass that is devoid of alkali and that has a B2O3 content of between 0 and <5 wt.-% and a BaO content in excess of 5.5 wt.-%. Said method is characterised by the addition of between 0.05 wt.-% and 1.0 wt.-% SnO2 during the preparation of the mixture.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: January 31, 2006
    Assignee: Schott Glas
    Inventors: Karin Naumann, Franz Ott, Ralf Diezel, Otmar Becker
  • Panel glass for cathode ray tube
    Patent number: 6956000
    Abstract: Panel glass, for a cathode ray tube, which has an SrO/(SrO+BaO) ratio of from 0.35 to 0.70, an X-ray absorption coefficient of 36.0 cm?1 or more at the wavelength of 0.6 angstrom, wherein Na2O/R2O, K2O/R2O and Li2O/R2O (R2O: Na2O+K2O+Li2O) molar ratios fall within a range surrounded by the points A (0, 0.2, 0.8), B (0.2, 0.2, 0.6), C (0.4, 0.6, 0), D (0.2, 0.8, 0) and E (0, 0.4, 0.6) in the ternary phase diagram as shown in FIG. 1.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: October 18, 2005
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Hiroshi Komori, Hiroki Yamazaki
  • Glass for substrate and glass substrate
    Patent number: 6949485
    Abstract: A glass for substrate, which consists, as represented by mass percentage, essentially of: SiO2 40 to 59%, Al2O3 ?5 to 20%, B2O3 ?0 to 8%, MgO ?0 to 10%, CaO ?0 to 12%, SrO ?2 to 20%, BaO ?0 to 2%, ZnO ?0 to 4%, Li2O ?0 to 2%, Na2O ?0 to 10%, K2O ?0 to 12%, TiO2 ?0 to 10%, and ZrO2 ?0 to 5%, wherein MgO+CaO+SrO+BaO is at least 15%.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: September 27, 2005
    Assignee: Asabi Glass Company, Limited
    Inventors: Tetsuya Nakashima, Yasumasa Nakao
  • Composition for insulating ceramics and insulating ceramics using the same
    Patent number: 6946415
    Abstract: An insulating ceramic composition includes a mixture of a ceramic powder containing MgAl2O4 and a glass powder containing 30-60% by mole of silicon oxide on the basis of SiO2 and 20-55% by mole of magnesium oxide on the basis of MgO, and the ceramic powder further includes Mg2SiO4 and TiO2. The insulating ceramic composition can be fired at 1000° C. and co-sintered with Ag and Cu. An insulating ceramic obtained by sintering the insulating ceramic composition has a high Q-factor and is therefore suitable for ceramic multilayer substrates used at high frequencies.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: September 20, 2005
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Osamu Chikagawa, Sadaaki Sakamoto, Yoichi Moriya
  • Lead-free enamel composition, the corresponding enamels and glass-ceramic articles, a new lead-free mineral glass
    Patent number: 6911408
    Abstract: Objects of the present invention are: a lead-free enamel composition comprising finely divided glass particles, finely divided pigment particles and an organic binder, characterised in that the glass of said particles is a lead-free mineral glass, essentially having the composition below, which is expressed in percentages by weight of oxides: SiO2 45-60 CaO ?0-12 B2O3 ?0-10 BaO 13-27 Al2O3 ?6-17 ZnO ?3-17 Na2O 0- 7 MgO 0- 9 K2O 0-7 TiO2 0-2 Li2O 0- 7 ZrO2 0- 7 with Na2O + K2O + Li2O > 4 the enamel able to be obtained by firing of said composition; glass-ceramic articles, which are decorated with said enamel; and new lead-free mineral glasses.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: June 28, 2005
    Assignee: EuroKera
    Inventors: Lionel Beunet, Sebastien Hyvart, Fabrice Minier, Sophie Peschiera, Christophe Remy
  • Compositions for the decoration of ceramic materials
    Patent number: 6881690
    Abstract: New decorating materials suitable for the decoration of ceramic materials comprise a lead-free glass flux and at least one pigment. The glass flux comprises two lead-free glass compositions. One of the two glass compositions comprises, in weight percent, SiO2: 45 to 60%, Al2O3: 5 to 20%, B2O3: 15 to 30%, and one or more alkali metal oxides: 5 to 10%, provided that Li2O is contained in an amount of 2% or more, with the proviso that the total amount of said oxides is 90% or more of the total weight of the composition. The other of the two glass compositions comprises, in weight percent, SiO2: 60 to 75%, Al203: 5 to 20%, at least one of MgO, CaO, ZnO: 5 to 20% in total, and one or more alkali metal oxides: 0.5 to 5%, provided that Li2O is contained in an amount of 0.5% or more, with the proviso that the total amount of said oxides is 90% or more of the total weight of the composition.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: April 19, 2005
    Assignee: Noritake Co., Ltd.
    Inventors: Takuya Kawamura, Hiromichi Hayashi, Nobuhiro Inoko
  • Method of preparing CRT funnel glass capable of effectively recycling another glass member
    Patent number: 6865909
    Abstract: A method for producing CRT funnel glass having a glass composition containing MgO, CaO, SrO, BaO and ZnO as essential components. Further, the total content of MgO, CaO, SrO, BaO and ZnO falls within a range of 5 to 13 mass %. As a glass material of the CRT funnel glass, CRT panel glass or CRT neck glass may be used. The method comprises preparing the glass material so as to contain MgO, CaO, SrO, BaO, and ZnO as essential components and so that the total content of MgO+CaO+SrO+BaO+ZnO falls within a range of 5 to 13 mass %; and melting the glass material.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: March 15, 2005
    Assignee: Nippon Electric Glass Co., Ltd
    Inventors: Hiroshi Komori, Hiroki Yamazaki
  • Optical glass having an anomalous dispersion
    Patent number: 6867157
    Abstract: An optical glass having a positive anomalous dispersion comprises, in mass %, SiO2 40-60% B2O3 3-9% TiO2 ?3-15% Nb2O5 0.1-5.0% Al2O3 ?3-15% WO3 0.5-5.0% MgO 0-3% CaO 0-3% SrO 0-3% BaO 0-3% K2O exceeding 10% and up to 21% Na2O ?0-10% Sb2O3 0-1% and a fluoride or fluorides of a metal element or elements ??3-10%, contained in the above metal oxides, a total amount of F contained in the fluoride or fluorides is free of PbO and As2O3 except for unavoidable mixing of these compounds as impurities, has optical constants of a refractive index (nd) within the range from 1.48 to less than 1.55 and an Abbe number (?d) within the range from 45 to 55, and has an anomalous dispersion (??g,F) of +0.0010 or over.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: March 15, 2005
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Junko Ishioka, Masahiro Onozawa
  • Lead-free glass tubing, especially for encapsulating diodes and diodes encapsulated with same
    Patent number: 6864197
    Abstract: The lead-free glass tubing of the SiO2—B2O3—R2O—BaO—ZnO—TiO2 system has a composition, in percent by weight on an oxide basis, consisting essentially of: SiO2, 34 to 52; B2O3, 10 to 25; Al2O3, 0 to 25; Li2O, 2 to 6; Na2O, 4 to 10; K2O, 2 to 6; CaO, 0 to 4; BaO, 1 to 5; ZnO, 4 to 12; TiO2, 2 to 6, and at least one refining agent in an effective amount for refining. An encapsulated diode consisting of a diode encapsulated with this lead-free glass tubing is also disclosed.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: March 8, 2005
    Assignee: Schott Glas
    Inventors: Peter Brix, Helmar Vetter, Oliver Fritz
  • Glass fiber composition
    Patent number: 6852656
    Abstract: The invention relates to a biologically-degradable glass fiber composition having good mechanical properties, good workability and in particular fiber-forming-capabilty features and resistance to humidity. The concentrations expressed in percent by weight for each component being the object of the invention are: SiO2: 61 to 66; Al2O3: 1.1 to 2.1; (CaO+MgO): higher than 9; (Na2O+K2O): higher than 18; B2O3: 4 to 15; P2O5: 0 to 5; SO3: 0 to 1; Fe2O3: 0 to 0.5; Others: less than 2.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: February 8, 2005
    Assignee: Techint Compagnia Tecnica Internazionale S.p.A.
    Inventors: Marco La Greca, Roberto Massini, Jorge Pasalaigua Huguet
  • Low-dielectric-constant glass fiber and glass fiber fabric made thereof
    Patent number: 6846761
    Abstract: Low-dielectric-constant glass fibers having a glass composition comprising, by weight %, 50 to 60% of SiO2, 10 to 18% of Al2O3, 14% to less than 20% of B2O3, 1% to less than 6% of MgO, 2 to 5% of CaO, 0.5 to 5% of TiO2, 0 to 0.3% of Li2O, 0 to 0.3% of Na2O, 0 to 0.5% of K2O and 0 to 2% of F2, the content of MgO+CaO being 4 to 11% and the content of Li2O+Na2O+K2O being 0 to 0.6%. The glass fiber has a low dielectric constant and a low dielectric tangent, is excellent in productivity and workability and is also excellent in water resistance, and the glass fiber is suitable for reinforcing printed wiring boards for high-density circuits.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: January 25, 2005
    Assignee: Nitto Boseki Co., Ltd.
    Inventor: Shinichi Tamura
  • Flat float glass
    Patent number: 6846760
    Abstract: This invention relates to a flat float glass that can be prestressed or transformed into a glass ceramic with high quartz mixed crystals or keatite mixed crystals. To eliminate undesirable surface defects during floating and to achieve superior characteristics of the glass or of he glass ceramic, in particular with regard to a low coefficient of thermal expansion and high light transmittance, the glass has a concentration of less than 300 ppb Pt, less than 30 ppb Rh, less than 1.5 wt. % ZnO and less than 1 wt. % SnO2, and is refined during melting without the use of the conventional fining agents arsenic oxide and/or antimony oxide.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: January 25, 2005
    Assignee: Schott Glas
    Inventors: Friedrich Siebers, Peter Nass, Gerhard Lautenschläger, Otmar Becker
  • Matrix glass for cathode ray tube panel, panel for cathode ray tube, and process for the production of the panel
    Publication number: 20040242396
    Abstract: A matrix glass for a cathode ray tube panel having excellent melt shapability and properties necessary for a cathode ray tube panel and a panel for a cathode ray tube are provided. The matrix glass is for use as a cathode ray tube panel glass after chemical strengthening, comprises, by mol %, 45 to 70% of SiO2, 0.1 to 20% of Al203, 7 to 20% of Li2O, 0.1 to 20% of Na2O, 1 to 13% of SrO, 0.1 to 3% of TiO2, 0.1 to 10% of ZrO2 and 0.01 to 1% of CeO2, and (1) exhibits a temperature of 980° C. or lower at a viscosity of 103 Pa·s or (2) contains none of MgO and CaO. The panel for a cathode ray tube is obtained by chemical strengthening of a shaped product formed of the above matrix glass.
    Type: Application
    Filed: January 24, 2003
    Publication date: December 2, 2004
    Inventor: Yoichi Hachitani
  • Glass-ceramic cooking panel that makes deposited material, such as dirt, less conspicuous
    Patent number: 6821628
    Abstract: The cooking panel is made from an opaque glass-ceramic material uniformly colored throughout and having keatite mixed crystals as the predominant crystalline phase. The cooking panel is made by ceramicizing a ceramicizable glass or a transparent glass-ceramic with high quartz mixed crystals as the predominant crystalline phase in a definite color location range with a brightness parameter value (L*) less than 85 and a color shade and chromaticity according to its later service and wear pattern. The cooking panel makes deposited material, such as dirt and the like, less conspicuous.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: November 23, 2004
    Assignee: Schott Glas
    Inventors: Bernd Schultheis, Waldemar Weinberg, Monica Cotlear De Witzmann, Roland Dudek, Friedrich Siebers, Klaus Schoenberger
  • CRT panel glass containing SrO and BaO
    Patent number: 6822383
    Abstract: In order to suppress production of devitrifying stones such as barium disilicate and strontium silicate and to achieve a high X-ray absorbability, a CRT panel glass does not substantially contain PbO and contains, in mass percent, 9-9.5% SrO and 8.5-9% BaO. In addition, the value of SrO/(SrO+BaO) is set to 0.50-0.53. Therefore, the CRT panel glass has an X-ray absorption coefficient of 28.0 cm−1 or more at 0.6 Å.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: November 23, 2004
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Hiroshi Komori, Hiroki Yamazaki
  • Tungsten sealing glass for use in a fluorescent lamp
    Patent number: 6815385
    Abstract: A tungsten sealing glass for use in a fluorescent lamp, said glass having a composition of, by mass percent, 65-76% SiO2, 10-25% B2O3, 2-6% Al2O3, 0.5-5.8% MgO+CaO+SrO+BaO+ZnO, 3-8% Li2O+Na2O+K2O, 0.01-4% Fe2O3+CeO2, 0.1-5% TiO2, 0.1-10% TiO2+Sb2O3+PbO, and 0-2% ZrO2, wherein Na2O/(Na2O+K2O)≦0.6.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: November 9, 2004
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Hiroyuki Kosokabe, Koichi Hashimoto
  • Aluminosilicate glass
    Publication number: 20040220038
    Abstract: A short optical glass is disclosed which does not comprise any silver, copper, thallium, lead or boron and is particularly suited for the application imaging, projection, telecommunication, optical information technology, and/or laser technology, also particularly suited for fiber applications (light guides or imaging guides). Preferably the glass has a refractive index of 1.55≦nd≦1.65 and an Abbe coefficient of 48≦vd≦57 and also has good attenuating and ion exchange characteristics, good chemical stability and good crystallization stability. The glass comprises 35 to <50 wt.-% SiO2; 1 to 10 wt.-% Al2O3; 5 to 15 wt.-% Na2O+K2O+CS2O+Li2O; 20 to 30 wt.-% BaO; 0 to 15 wt.-% ZnO; 0 to 10 wt.-% La2O3; 0 to 10 wt.-% ZrO2; 0 to 6 wt.-% P2O5; 0 to 8 wt.-% MgO+CaO+SrO; 0 to 3 wt.-% of other oxides, and Cs2O<1, Li2O<1, and TiO2<1 wt.-%.
    Type: Application
    Filed: February 24, 2004
    Publication date: November 4, 2004
    Inventors: Silke Wolff, Ute Woelfel, Uwe Kolberg, Holger Kasprzik
  • Glass composition for an electric lamp, stem and bulb for an electric lamp using the same, and electric lamp using the same
    Patent number: 6812175
    Abstract: To suppress breakage of glass for an electric lamp in a process in which the glass that has already been formed is processed further, a glass composition for an electric lamp is provided. The glass composition contains, expressed in mol %, 70 to 85% of SiO2, 12 to 17% of R2O, and 2 to 8.5% of MO (where R represents at least one selected from Li, Na and K, and M represents at least one selected from Mg, Ca, Sr, Ba, Zn and Pb). In the glass composition, the respective contents of CaO, MgO, BaO and SrO satisfy the relationship, CaO+MgO>BaO+SrO. The glass composition has a brittleness index value B determined by the Vickers hardness test of 7,000 m−1/2. Preferably, the contents of SrO and BaO are 0 to 0.5% and 0.1 to 1%, respectively. More preferably, the respective contents of K2O and Na2O satisfy the relationship, K2O>Na2O.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: November 2, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akira Kawase, Tomoko Atagi, Masanobu Ito
  • Lighting glass and colored glass bulbs, and manufacturing method thereof
    Patent number: 6812173
    Abstract: Lighting glass containing 0.3 to 1.0% by weight of Sb as Sb2O3 and 0.5 to 1.0% by weight of S as SO3 in a SiO2—Al2O3—R1O—R22O-based glass (where R1 represents Ca, Sr, Mg and Ba and R2 represents Na, K and Li) in which colloids comprising SbS2 and/or Sb2S3 are generated in the glass.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: November 2, 2004
    Assignee: Nipro Corporation
    Inventor: Yoshihisa Ishihara
  • Glass composition
    Publication number: 20040186000
    Abstract: A glass composition of the present invention relates to a multicomponent oxide glass composition manufactured by melting glass raw materials, which contains: 10 ppm or more of at least one type of a polyvalent element; minimum valence cations of the polyvalent element in a ratio of the minimum valence cation content to the total polyvalent element content of 5 to 98% in mass ratio; and 0.01 to 2 &mgr;l/g (0° C., 1 atm) of helium.
    Type: Application
    Filed: February 17, 2004
    Publication date: September 23, 2004
    Inventors: Toru Kawamoto, Yoshifumi Sato, Toshifumi Matsuda
  • Glass-ceramics for a light filter
    Patent number: 6794043
    Abstract: There is provided a glass-ceramic which is suitable for use as a light filter. The glass-ceramic has Young's modulus (GPa) within a range from 95 to 120 and includes 5.3-8 weight percent of Al2O3, 0.5-3.5 weight percent of ZrO2 and 71-81 weight percent of SiO2, based respectively on the total content of the oxides. The glass-ceramic preferably has, as its predominant crystal phases, (a) lithium disilicate (Li2O.2SiO2) and (b) at least one of &agr;-quartz (&agr;-SiO2) and &agr;-quartz solid solution (&agr;-SiO2 solid solution), has specific gravity within a range from 2.4 to 2.6 and has a coefficient of thermal expansion within a range from 65×10−7/° C. to 130×10−7/° C. within a temperature range from −50° C. to +70° C.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: September 21, 2004
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Naoyuki Goto, Junko Ishioka, Yasuyuki Kawashima
  • Glasses for display panels and photovoltaic devices
    Patent number: RE38959
    Abstract: An aluminosilicate glass having a composition consisting essentially of, as calculated in weight percent on an oxide basis, of 58-70% SiO2, 12-22% Al2O3, 3-15% B2O3, 2-12% CaO, 0-3% SrO, 0-3% BaO, 0-8% MgO, 10-25% MCSB (i.e., MgO+CaO+SrO+BaO), and SrO and BaO in combination being less than 3%.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: January 31, 2006
    Assignee: Corning Incorporated
    Inventor: Jeffrey T. Kohli