Phosphorus Containing Patents (Class 501/45)
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Patent number: 5328874Abstract: This invention relates to the preparation of a glass exhibiting a transition temperature normally below about 300.degree., a working temperature below about 400.degree., while, at the same time, exhibiting excellent resistance to attack by water. Specifically, the present invention discloses a glass consisting essentially in terms of mole percent on the oxide basis, of 15-35% P.sub.2 O.sub.5, 1-25% SO.sub.3, 30-55% ZnO, 0-25% R.sub.2 O, wherein R.sub.2 O is selected from the group consisting of 0-25% Li.sub.2 O, 0-25% Na.sub.2 O, and 0-25% K.sub.2 O, and up to a total of 15% of optional ingredients in the indicated proportions selected from the group consisting of 0-10% Al.sub.2 O.sub.3, 0-10% MgO, 0-10% CaO, 0-10% SrO, 0-10% BaO, 0-10% MnO, 0-10% transition metal oxides and 0-15% Cl+F, as analyzed in weight percent.Type: GrantFiled: October 18, 1993Date of Patent: July 12, 1994Assignee: Corning IncorporatedInventors: George H. Beall, Joseph E. Pierson
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Patent number: 5322820Abstract: Phosphate glass compositions which exhibit both athermal behavior under high thermal loading and high thermal shock resistance without special conditioning. High gain, laser rods, discs and other optical elements formed of these phosphate glass compositions are also described.Type: GrantFiled: December 8, 1992Date of Patent: June 21, 1994Assignee: Kigre, Inc.Inventors: John D. Myers, Shibin Jiang
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Patent number: 5296026Abstract: Disclosed are useful and unique glass phosphate cement compositions and methods for their use as surgical implant materials to fill cavities in bone and canals in teeth. The cement compositions consist of glass powders having a range of chemicals including P.sub.2 O.sub.5, CaO, SrO and Na.sub.2 O in combination with an aqueous liquid and with or without therapeutic agents. Mixing the powder and liquid results in a hardening reaction. When the cement is implanted into hard tissue, it serves as a filler/graft material and along with the release of leachable constituents it can assist in the healing and maintenance of healthy bone.Type: GrantFiled: December 2, 1988Date of Patent: March 22, 1994Inventors: Eugene A. Monroe, Wei-Shi Chen
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Patent number: 5286683Abstract: This invention is directed to the production of glasses exhibiting transition temperatures below 375.degree. C., preferably below 350.degree. C., and superior resistance to attack by boiling water. The glasses contain at least 10% copper, as expressed in terms of CuO, the predominant proportion of the copper being present in the Cu.sup.+2 oxidation state. The glasses consist essentially, in mole percent, of______________________________________ Li.sub.2 O 0-15 MgO 0-15 B.sub.2 O.sub.3 0-5 Na.sub.2 O 0-20 CaO 0-20 ZnO 0-37 K.sub.2 O 0-10 SrO 0-20 Sb.sub.2 O.sub.3 0-36 Tl.sub.2 O 0-15 BaO 0-20 CeO.sub.2 0-3 Li.sub.2 O + Na.sub.2 O + 12-30 MgO + 0-25 MoO.sub.3 0-7 K.sub.2 O + Tl.sub.2 O CaO + SrO + BaO CuO 10-50 Al.sub.2 O.sub.3 + B.sub.2 O.sub.3 0-5 RE.sub.2 O.sub.3 0-2 P.sub.2 O.sub.5 28-36 Al.sub.2 O.sub.3 0-5 WO.sub.3 0-7 MnO 0-20 ______________________________________wherein at least two alkali metal oxides are present and up to 12% by weight fluoride may optionally be present.Type: GrantFiled: November 5, 1992Date of Patent: February 15, 1994Assignee: Corning IncorporatedInventor: Bruce G. Aitken
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Patent number: 5281560Abstract: Lead-free, tin phosphate glasses contain 25-50 mole percent P.sub.2 O.sub.5, 30-70% SnO, 0-15% ZnO, the mole ratio of SnO:ZnO being greater than 5:1, and an effective amount up to 25% total of at least one oxide in the indicated proportion selected from the group consisting of up to 25% R.sub.2 O, wherein R.sub.2 O consists of 0-25% Li.sub.2 O, 0-25% Na.sub.2 O, and 0-25% K.sub.2 O, up to 20% B.sub.2 O.sub.3, up to 5% Al.sub.2 O.sub.3, up to 5% SiO.sub.2, and up to 5% WO.sub.3. The glasses are particularly useful as sealing glass frits in sealing material to join component parts in electrical and electronic devices. The sealing glass material may contain mill additions to reduce the effective coefficient of thermal expansion in a seal, as well as a strength reinforcing additive having a coefficient of thermal expansion preferably below 120.times.10.sup.-7 /.degree.C.Type: GrantFiled: June 21, 1993Date of Patent: January 25, 1994Assignee: Corning IncorporatedInventors: Gaylord L. Francis, Robert Morena
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Patent number: 5256604Abstract: This invention is directed to the production of glasses exhibiting an annealing point between 290.degree.-325.degree. C., an index of refraction between 1.57-1.66, a linear coefficient of thermal expansion (25.degree.-300.degree. C.) between 130-160.times.10.sup.-7 /.degree.C., and a weight loss after exposure to boiling water for six hours no greater than 0.1% consisting essentially, expressed in terms of mole percent on the oxide basis, of______________________________________ Li.sub.2 O 0-10 CaO + SrO + 0-20 BaO(RO) Na.sub.2 O 0-10 ZnO 26-50 Li.sub.2 O + Na.sub.2 O 1-20 RO + ZnO 26-50 K.sub.2 O 0-8 SnO 0-5 Li.sub.2 O + Na.sub.2 O + 5-25 Sb.sub.2 O.sub.3 0-8 K.sub.2 O(R.sub.2 O) Ag.sub.2 O 0-13 Al.sub.2 O.sub.3 0.25-5 Tl.sub.2 O 0-12 P.sub.2 O.sub.5 30-36 Ag.sub.2 O + Tl.sub.2 O 1-14 B.sub.2 O.sub.3 0-5 R.sub.2 O + Ag.sub.2 O + Tl.sub.2 O 15-30 CuO 0-5 CaO 0-20 Bi.sub.2 O.sub.3 0-3 BaO 0-10 CeO.sub.Type: GrantFiled: April 24, 1992Date of Patent: October 26, 1993Assignee: Corning IncorporatedInventor: Bruce G. Aitken
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Patent number: 5252523Abstract: This invention is directed towards the production of a bioabsorbable glass-polymer alloy comprising a bioabsorbable glass and a bioabsorbable polymer, said glass having a working temperature below about 350.degree. C., a transition temperature no higher than about 250.degree. C., and which exhibits a dissolution weight loss rate which is similar to the rate at which a bioabsorbable polymer is absorbed by the body. Such exemplary bioabsorbable polymers include poly(lactic) acid, poly(glycolic) acid, poly(dioxanone), polyethylene terephthalate, polyethylene oxide poly(caprolactone), copolymers of lactic acid and glycolic acid, and mixtures thereof.The glass disclosed herein consists essentially, expressed in terms of weight percent on the oxide basis, of at least 85% total of 30-55% P.sub.2 O.sub.5, 12-35% ZnO, 10-30% Cl, and 15-40% R.sub.2 O, wherein R.sub.2 O consists of at least one alkali metal oxide in the indicated proportions selected from the group consisting 5-25% Na.sub.2 O, 0-25% K.sub.Type: GrantFiled: April 2, 1992Date of Patent: October 12, 1993Assignee: Corning IncorporatedInventors: George H. Beall, Beth C. Monahan, Candace J. Quinn
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Patent number: 5249076Abstract: Provided is an optical filter structure which has excellent solarization resistance, and stably gives a constant wavelength distribution and constant irradiation energy for a long time, and which efficiently cuts off infrared light including near infrared light and ultraviolet light having a short wavelength and is sufficiently permeable to visible light. The optical filter structure has a glass filter 7 formed of phosphate or fluorophosphate glass containing 0.1 to 5% by weight, as an oxide, of copper oxide and an aquafilter 6 having a liquid layer 5 measuring 3 to 50 mm as a light path length, the glass filter 7 being placed either outside a container wall, 2a or 2b, of the aquafilter 6 or within the liquid layer 5, and the optical filter structure has optical characteristics that the absorption edge on a short wavelength side is a region of light having a wavelength of 250 to 330 nm and that the maximum value of the spectral transmittance on a long wavelength side beyond 780 nm is not more than 40%.Type: GrantFiled: August 25, 1992Date of Patent: September 28, 1993Assignees: Hoya Corporation, Dainippon Plastics Co., Ltd.Inventors: Shigetoshi Fujiwara, Yoshio Kishima, Tadasu Inoue
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Patent number: 5246892Abstract: Faraday rotation glass having a practically sufficiently large Verdet's constant, which contains 60 to 75 mol % of P.sub.2 O.sub.5, 10 to 20 mol % of Tb.sub.2 O.sub.3 and 10 to 25 mol % of K.sub.2 O and having substantially no platinum inclusion.Type: GrantFiled: June 22, 1992Date of Patent: September 21, 1993Assignee: Hoya CorporationInventors: Hiroaki Yanagita, Hisayoshi Toratani, Tomoko Kasuga
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Patent number: 5246890Abstract: Lead-free, SnO-ZnO-P.sub.2 O.sub.5 glasses contain 25-50 mole percent P.sub.2 O.sub.5 and SnO and ZnO in amounts such that the mole ratio of SnO:ZnO is in the range of 1:1 to 5:1. Optionally, the glasses may contain up to 20 mole percent of modifying oxides including up to 5 mole percent SiO.sub.2, up to 20 mole percent B.sub.2 O.sub.3 and up to 5 mole percent Al.sub.2 O.sub.3, as well as one or more crystallization promoters selected from 1-5 mole percent zircon and/or zirconia and 1-15 mole percent R.sub.2 O. The glasses are particularly useful as sealing glass frits in sealing material to join component parts in articles such as cathode ray tubes. The sealing glass material may contain mill additions to reduce the effective coefficient of thermal expansion in a seal.Type: GrantFiled: August 3, 1992Date of Patent: September 21, 1993Assignee: Corning IncorporatedInventors: Bruce G. Aitken, Dana C. Bookbinder, Margaret E. Greene, Robert M. Morena
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Patent number: 5236495Abstract: A calcium phosphate type glass-ceramic which comprises from 64 to 72% by weight of phosphorus oxide in terms of P.sub.2 O.sub.5, from 13 to 20% by weight of calcium oxide in terms of CaO, from 6 to 13% by weight of strontium oxide in terms of SrO, and from 3 to 15% by weight in total of at least one member selected from the group consisting of aluminum oxide, cerium oxide and lanthanum oxide respectively in terms of Al.sub.2 O.sub.3, Ce.sub.2 O.sub.3 and La.sub.2 O.sub.3, a molar ratio of (CaO+SrO)/P.sub.2 O.sub.5 being 0.78-0.86.Type: GrantFiled: August 21, 1991Date of Patent: August 17, 1993Assignee: Asahi Glass Company Ltd.Inventors: Tsuneo Manabe, Hirosi Usui, Yasuko Osaki
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Patent number: 5227148Abstract: Vitreous solid compositions at 25.degree. C. are useful as solid state electrolytes and are comprised of either Li.sub.3 PO.sub.4 or LiPO.sub.3 as a network former and/or network modifier.Type: GrantFiled: May 19, 1992Date of Patent: July 13, 1993Assignee: Eveready Battery Company, Inc.Inventors: James R. Akridge, Steven D. Jones
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Patent number: 5218035Abstract: New surgical cements for use in medical applications such as orthopedic and maxillofacial surgeries and dental applications are disclosed. These surgical cements comprise a hardened cement formed from a mixture comprising a cementing component selected from the group consisting of ceramics having the formulaw(RO)--x(R.sub.2 O)--y(P.sub.2 O.sub.5)--z(X)wherein RO is selected from the group consisting of CaO and mixtures of CaO and MgO, R.sub.2 O is selected from the group consisting of alkali metal oxides and mixtures thereof, X is selected from the group consisting of SO.sub.4 and Cl, and w, x, y and z are the mole fractions of the respective constituents in the ceramic, when X is SO.sub.4, w is in the range of about 0.25 to about 0.5, x is in the range of about 0.05 to about 0.4, y is in the range of about 0.05 to about 0.25 and z is in the range of about 0.01 to about 0.25, and when X is Cl, w is in the range of about 0.25 to about 0.5, x is in the range of about 0.05 to about 0.Type: GrantFiled: February 3, 1992Date of Patent: June 8, 1993Inventor: Sung-Tsuen Liu
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Patent number: 5215563Abstract: A process for preparing an improved durable glass composition is described. In the first step of the process, a glass batch containing from 40 to 80 mole percent of phosphorous and from 3 to 40 mole percent of iron is provided. In the second step of the process, the glass batch is melted under an enriched oxygen atmosphere.Type: GrantFiled: November 1, 1990Date of Patent: June 1, 1993Assignee: Alfred UniversityInventors: William C. LaCourse, Steve T. Lin, Thirukumar Vethanyagam
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Patent number: 5173454Abstract: Glass or crystal particles of nanocrystalline size having a minor dimension of 0.1 to 100 Angstrom units. They may be prepared by controlled thermal separation of phase-separable glasses. Preferred crystal forms are zinc pyrophosphate and lithium disilicate. A crystallizable glass is combined with phyllosilicate particles and sintered to form an oriented composite body. During slow sintering, the crystal grows epitaxially on the phyllosilicate.Type: GrantFiled: January 9, 1992Date of Patent: December 22, 1992Assignee: Corning IncorporatedInventor: Hermann L. Rittler
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Patent number: 5173212Abstract: An aluminophosphate glass containing copper(II) oxide having a low transmission in the near infrared range with a steep absorption edge as well as a very uniform high transparency in the visible range is particularly suitable as filter glass for color video cameras or as filter glass, e.g., for goggles and color displays, said glass comprising, in % by weight on the oxide basis, 67-77 of P.sub.2 O.sub.5 ; 8-13 of Al.sub.2 O.sub.3 ; 0-5.5 of B.sub.2 O.sub.3 ; 0-2.1 of SiO.sub.2 ; 0-2.5 of Li.sub.2 O; 0-6 of Na.sub.2 O; 0-14 of K.sub.2 O; 0-2.5 of Rb.sub.2 O; 0-2.5 of Cs.sub.2 O; .SIGMA. alkali metal oxide 3-14; 2.5-4.9 of MgO; 0-2.5 of CaO; 0-2.5 of SrO; 0-2.5 of BaO; 0-2.5 of ZnO; .SIGMA. alkaline-earth metal oxides+ZnO less than 5; 2-7.5 of CuO; 0.001-0.5 of V.sub.2 O.sub.5 ; CuO+V.sub.2 O.sub.5 of 2-7.5.Type: GrantFiled: October 4, 1991Date of Patent: December 22, 1992Assignee: Schott GlaswerkeInventors: Burkhard Speit, Ansgar Karnehm, Magdalena Winkler-Trudewig
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Patent number: 5173456Abstract: A low-or no-silica, low- or no-alkali phosphate glass useful as a laser amplifier in a multiple pass, high energy laser system having a high thermal conductivity, K.sub.90.degree. C. >0.85 W/mK, a low coefficient of thermal expansion, .alpha..sub.20.degree.-300.degree. C. <80.times.10.sup.-7 /.degree.C., low emission cross section, .sigma.<2.5.times.10.sup.-20 cm.sup.2, and a high fluorescence lifetime, .tau.>325 .mu.secs at 3 wt. % Nd doping, consisting essentially of (on an oxide composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 52-72 Al.sub.2 O.sub.3 0-<20 B.sub.2 O.sub.3 >0-25 ZnO 0-31 Li.sub.2 O 0-5 K.sub.2 O 0-5 Na.sub.2 O 0-5 Cs.sub.2 O 0-5 Rb.sub.2 O 0-5 MgO >0-<30 CaO 0-20 BaO 0-20 SrO 0-<20 Sb.sub.2 O.sub.3 0-<1 As.sub.2 O.sub.3 0-<1 Nb.sub.2 O.sub.5 0-<1 Ln.sub.2 O.sub.3 up to 6.5 PbO 0-<5 SiO.sub.2 0-3 ______________________________________whereinLn.sub.2 O.sub.Type: GrantFiled: December 20, 1990Date of Patent: December 22, 1992Assignee: Schott Glass Technologies, Inc.Inventors: Yuiko T. Hayden, Donna Guesto-Barnak
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Patent number: 5164343Abstract: Ion-exchangeable phosphate glass compositions containing in mole percent from about 50 to 70% P.sub.2 O.sub.5, from about 5 to 30% Li.sub.2 O, from about 5 to 25% MO, where M is selected from the group consisting of Be, Mg, Ca, Sr, Ba, and Zn, and about 5 to 30% X.sub.2 O.sub.3, where X is selected from the group consisting of Al, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu are provided. In another aspect, the phosphate glass compositions of the present invention also contain in mole percent up to 10% R.sub.2 O, where R is selected from the group consisting of Na, K, Rb and Cs. Solarization inhibitors and minor amounts of anhydrous fluorides and chlorides are also included in some embodiments. Optical quality phosphate glass articles formed of the phosphate glass compositions of the present invention are readily ion- exchangeable when contacted with certain salts. Optical quality phosphate glass articles are also provided having good thermal shock resistance.Type: GrantFiled: May 22, 1991Date of Patent: November 17, 1992Assignee: Kigre, Inc.Inventor: John D. Myers
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Patent number: 5162267Abstract: A biocompatible, strong, radio-opaque high melting glass is obtained by reacting at the melt mono-basic calcium phosphate with phosphoric acid and a radio-opaque-imparting component such as bismuth oxide (Bi.sub.2 O.sub.3) or barium oxide (BaO). After soaking, cooling and drying, the glass may be ground to desired particle size, and is admirably suited for use as a filler, binder, or structural mass in the dental and medical fields.Type: GrantFiled: September 27, 1991Date of Patent: November 10, 1992Inventor: Milagros B. Smyth
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Patent number: 5153151Abstract: This invention is drawn to fluorine-free glasses having refractive indices of at least 1.65 which generally consist, in mole percent, of:______________________________________ P.sub.2 O.sub.5 24-36 ZnO 0-45 Li.sub.2 O 0-15 Na.sub.2 O 0-20 K.sub.2 O 0-10 Ag.sub.2 O 0-25 Tl.sub.2 O 0-25 Li.sub.2 O + Na.sub.2 O + K.sub.2 O + Ag.sub.2 O + Tl.sub.2 O 15-30 PbO 0-20 CaO 0-20 CuO 0-5 CeO.sub.2 0-2 SrO 0-20 BaO 0-20 CaO + SrO + BaO 0-25 Sb.sub.2 O.sub.3 0-61 Bi.sub.2 O.sub.3 0-10 Sb.sub.2 O.sub.3 + Bi.sub.2 O.sub.3 0-61 Sb.sub.2 O.sub.3 + Bi.sub.2 O.sub.3 + Ag.sub.2 O + Tl.sub.2 O 7-76 SnO 0-5 Al.sub.2 O.sub.3 0-5 B.sub.2 O.sub.3 0-10 Al.sub.2 O.sub.3 + B.sub.2 O.sub.Type: GrantFiled: May 6, 1991Date of Patent: October 6, 1992Assignee: Corning IncorporatedInventor: Bruce G. Aitken
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Patent number: 5108477Abstract: A method for foming glass articles of substantial thickness from unstable glass compositions which normally devitrify when formed by conventional casting or molding processes, is disclosed. The method includes the steps of quench-cooling the glass to form a crystal-free glass feedstock material, and then pressure-consolidating the feedstock at a temperature between the transition temperature and the crystallization temperature of the glass.Type: GrantFiled: May 21, 1990Date of Patent: April 28, 1992Assignee: Corning IncorporatedInventors: Lauren K. Cornelius, Linda H. Marks, Teresa C. Nolet, Paul A. Tick, Donald M. Trotter, Jr.
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Patent number: 5085953Abstract: Vitreous solid compositions at 25.degree. C. are useful as solid state electrolytes and are comprised of either Li.sub.3 PO.sub.4 or LiPO.sub.3 as a network former and/or network modifier.Type: GrantFiled: September 18, 1990Date of Patent: February 4, 1992Assignee: Eveready Battery Company, Inc.Inventors: James R. Akridge, Steven D. Jones
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Patent number: 5071795Abstract: This invention is directed to the production of glasses demonstrating working temperatures below about 450.degree. C., transition temperatures no higher than about 350.degree. C., and good resistance to attack by mild aqueous alkaline solutions consisting essentially, expressed in terms of mole percent on the oxide basis of______________________________________ Li.sub.2 O 0-25 ZnO 25-50 Na.sub.2 O 5-20 Al.sub.2 O.sub.3 0-3 K.sub.2 O 0-12 P.sub.2 O.sub.5 25-37 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 15-35 SnO 0-10 ______________________________________to which are included 0.5-8% Cl and 0-5% F., as analyzed in weight percent.Type: GrantFiled: January 9, 1991Date of Patent: December 10, 1991Assignee: Corning IncorporatedInventors: George H. Beall, Candace J. Quinn
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Patent number: 5053360Abstract: Ion-exchangeable phosphate glass compositions containing in mole percent from about 50 to 70% P.sub.2 O.sub.5, from about 5 to 30% Li.sub.2 O, from about 5 to 25% MO, where M is selected from the group consisting of Be, Mg, Ca, Sr, Ba, and Zn, and about 5 to 30% X.sub.2 O.sub.3, where X is selected from the group consisting of Al, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu are provided. In another aspect, the phosphate glass compositions of the present invention also contain in mole percent up to 10% R.sub.2 O, where R is selected from the group consisting of Na, K, Rb and Cs. Solarization inhibitors and minor amounts of anhydrous fluorides and chlorides are also included in some embodiments. Optical quality phosphate glass articles formed of the phosphate glass compositions of the present invention are readily ion-exchangeable when contacted with certain salts. Optical quality phosphate glass articles are also provided having good thermal shock resistance.Type: GrantFiled: June 29, 1989Date of Patent: October 1, 1991Assignee: Kigre, Inc.Inventor: John D. Myers
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Patent number: 5045508Abstract: A method of improving surface-dependent properties of phosphate glass such as durability and wear resistance without significantly affecting its thermal expansion coefficient is provided which comprises annealing the glass in a dry ammonia atmosphere at temperatures approximating the transition temperature of the glass. The ammonia annealing treatment of the present invention is carried out for a time sufficient to allow incorporation of a thin layer of nitrogen into the surface of the phosphate glass, and the treatment improves the durability of the glass without the reduction in the thermal expansion coefficient that has restricted the effectiveness of prior ammonia treatments. The improved phosphate glass resulting from this method is superior in wear resistance, yet maintains suitable thermal expansion properties so that it may be used effectively in a variety of applications requiring hermetic glass-metal seals.Type: GrantFiled: April 30, 1990Date of Patent: September 3, 1991Assignee: The United States of America as represented by the United States Department of EnergyInventors: Richard K. Brow, Delbert E. Day
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Patent number: 5032315Abstract: A low- or no-silica phosphate glass useful as a high average power laser medium and having a high thermal conductivity, K.sub.90.degree. C. >0.8 W/mK, and a low coefficient of thermal expansion, .alpha..sub.20.degree.-300.degree. C. <90.times.10.sup.-7 /.degree.C., consisting essentially of (on a batch composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 45-70 Li.sub.2 O 0-14 Na.sub.2 O 0-12 K.sub.2 O 0-6 Al.sub.2 O.sub.3 9-15 Nd.sub.2 O.sub.3 0.01-6 La.sub.2 O.sub.3 0-6 SiO.sub.2 0-8 B.sub.2 O.sub.3 0-8 MgO 6-30 CaO 0-15 SrO 0-9 BaO 0-9 ZnO 0-15 .SIGMA. MgO + Li.sub.2 O 20-30 ______________________________________whereby said glass has K.sub.90.degree. C. >0.8 W/mK and .alpha..sub.20.degree.-300.degree. C. <90.times.10.sup.-7 /.degree.C. The Nd.sub.2 O.sub.3 can be replaced by other lasing species.Type: GrantFiled: May 18, 1989Date of Patent: July 16, 1991Assignee: Schott Glass Technologies, Inc.Inventors: Joseph S. Hayden, Julia M. Ward
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Patent number: 5021366Abstract: This invention is drawn particularly to the production of glasses having essentially fluorine-free compositions consisting essentially, in mole percent, of:______________________________________ Li.sub.2 O 5-10 P.sub.2 O.sub.5 30-36 Na.sub.2 O 5-15 Al.sub.2 O.sub.3 0-5 K.sub.2 O 0-6 CeO.sub.2 0-2 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 15-25 SnO 0-20 ZnO 10-33 PbO 0-20 CaO 0-20 Sb.sub.2 O.sub.3 0-12 SrO 0-20 Bi.sub.2 O.sub.3 0-6 BaO 0-20 SnO + PbO + 0-20. Sb.sub.2 O.sub.3 + Bi.sub.2 O.sub.Type: GrantFiled: October 19, 1990Date of Patent: June 4, 1991Assignee: Corning IncorporatedInventor: Bruce G. Aitken
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Patent number: 4997718Abstract: Extremely low-melting oxide glasses useful in silver/glass die-attach materials are disclosed. These glasses are composed of silver oxide, phosphorus oxide and a third component comprising PbO, CdO, ZnO or combination thereof. Their melting point lies in the 200.degree.-300.degree. C. range.Type: GrantFiled: November 8, 1989Date of Patent: March 5, 1991Assignee: VLSI Packaging Materials, Inc.Inventors: Maurice E. Dumesnil, Leo Finkelstein
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Patent number: 4996172Abstract: This invention is concerned with the preparation of glasses exhibiting transition temperatures below 450.degree. C., working temperatures below 500.degree. C., and exceptional resistance to mild aqueous alkaline solutions consisting essentially, expressed in terms of mold percent on the oxide basis, of:______________________________________ ZnO 12-55 K.sub.2 O 0-25 P.sub.2 O.sub.5 28-40 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 10-35 Li.sub.2 O 0-25 Rare earth metal oxide 1-5 Na.sub.2 O 0-25 ______________________________________At least two alkali metal oxides will most desirably be present.Type: GrantFiled: June 29, 1989Date of Patent: February 26, 1991Assignee: Corning IncorporatedInventors: George H. Beall, James E. Dickinson, Jr., Candace J. Quinn
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Patent number: 4962067Abstract: Phosphate laser glass compositions which include erbium ions as the active laser ion material. In one aspect, ytterbium, chromium and cerium ions are present as auxiliary dopants. The ytterbium, chromium and cerium additives serve to sensitize the erbium-doped phosphate glasses of the present invention. The glasses are particularly useful in applications where an "eye-safe" wavelength is desirable.Type: GrantFiled: July 14, 1989Date of Patent: October 9, 1990Assignee: Kigre, Inc.Inventor: John D. Myers
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Patent number: 4940677Abstract: This invention is directed to the preparation of glasses exhibiting a transition temperature below 450.degree. C., a working temperature below 500.degree. C., and excellent resistance to attack by water and mild aqueous alkaline solutions. The glasses consist essentially, in mole percent, of at least 65% total of 23-55% ZnO, 28-40% P.sub.2 O.sub.5, and 10-35% R.sub.2 O, wherein R.sub.2 O consists of at least two alkali metal oxides in the indicated proportions selected from the group consisting of 0-25% Li.sub.2 O, 0-25% Na.sub.2 O, and 0-25% K.sub.2 O, and up to 35% total of optional ingredients in the indicated proportions selected from the group consisting of 0-6% Al.sub.2 O.sub.3, 0-8% B.sub.2 O.sub.3, 0-8% Al.sub.2 O.sub.3 +B.sub.2 O.sub.3, 0-15% Cu.sub.2 O, 0-5% F, 0-35% PbO, 0-35% SnO, 0-35% PbO+SnO, 0-5% ZrO.sub.2, 0-4% SiO.sub.2, and 0-15% MgO+CaO+SrO+BaO+MnO, consisting of 0-10% MgO, 0-10% CaO, 0-10% SrO, 0-12% BaO, and 0- 10% MnO.Type: GrantFiled: December 26, 1989Date of Patent: July 10, 1990Assignee: Corning IncorporatedInventors: George H. Beall, Candace J. Quinn
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Patent number: 4929387Abstract: A low- or no-silica phosphate glass useful as a laser medium and having a high thermal conductivity, K.sub.90.degree. C. >0.8 W/mK, and a low coefficient of thermal expansion, .alpha..sub.20.degree.-40.degree. C. <80.times.10.sup.-7 /.degree.C., consists essentially of (on a batch composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 45-70 Li.sub.2 O 15-35 Na.sub.2 O 0-10 Al.sub.2 O.sub.3 10-15 Nd.sub.2 O.sub.3 0.01-6 La.sub.2 O.sub.3 0-6 SiO.sub.2 0-8 B.sub.2 O.sub.3 0-8 MgO 0-18 CaO 0-15 SrO 0-9 BaO 0-9 ZnO 0-15 ______________________________________the amounts of Li.sub.2 O and Na.sub.2 O providing an average alkali metal ionic radius sufficiently low whereby said glass has K.sub.90.degree. C. >0.8 W/mK and .alpha..sub.20.degree.-40.degree. C. <80.times.10.sup.-7 /.degree.C., and wherein, when the batch composition is melted in contact with a silica-containing surface, the final glass composition contains at most about 3.Type: GrantFiled: April 3, 1989Date of Patent: May 29, 1990Assignee: Schott Glass Technologies, Inc.Inventors: Joseph S. Hayden, David L. Sapak, Julia M. Ward
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Patent number: 4875920Abstract: Ion-exchangeable phosphate glass compositions containing in mole percent from about 50 to 70% P.sub.2 O.sub.5, from about 5 to 30 % Li.sub.2 O, from about 5 to 25% MO, where M is selected from the group consisting of Be, Mg, Ca, Sr, Ba, and Zn, and about 5 to 30% X.sub.2 O.sub.3, where X is selected from the group consisting of Al, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu are provided. In another aspect, the phosphate glass compositions of the present invention also contain in mole percent up to 10% R.sub.2 O, where R is selected from the group consisting of Na, K, Rb and Cs. Solarization inhibitors and minor amounts of anhydrous fluorides and chlorides are also included in some embodiments. Optical quality phosphate glass articles formed of the phosphate glass compositions of the present invention are readily ion- exchangeable when contacted with certain salts. Optical quality phosphate glass articles are also provided having good thermal shock resistance.Type: GrantFiled: December 4, 1987Date of Patent: October 24, 1989Assignee: Kigre, IncInventor: John D. Myers
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Patent number: 4857486Abstract: Disclosed are an adhesive for oxide ceramics, which comprises as its effective ingredient a crystallized glass mainly comprising SiO.sub.2, Al.sub.2 O.sub.3, Li.sub.2 O, MgO and/or ZnO, and TiO.sub.2 and/or ZrO.sub.2, and also a method of bonding oxide ceramics together, which comprises heating oxide ceramics to be bonded together at 1200.degree. to 1600.degree. C. with the adhesive placed between the ceramics.Type: GrantFiled: May 12, 1988Date of Patent: August 15, 1989Assignee: Japan as represented by Director General of Agency of Industrial Science and TechnologyInventors: Yoshihiro Ebata, Masanori Kouyama, Nobuyuki Tamari, Takamichi Kawamoto
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Patent number: 4849001Abstract: A porous water soluble glass body is formed by sintering powdered glass, compacted to a predetermined density, at a temperature near the glass softening temperature (T.sub.s). The porous body may be impregnated with an organic material for subsequent release at a rate determined by the glass solubility.Type: GrantFiled: August 19, 1987Date of Patent: July 18, 1989Assignee: STC PLCInventors: Cyril F. Drake, Alfred J. Arch, Mary Tripp
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Patent number: 4847219Abstract: The invention described and claimed in the specification relates to the discovery that effective addition of Fe.sub.2 O.sub.3 to a lead phosphate glass results in a glass having enhanced chemical durability and physical stability, and consists essentially of the glass resulting from melting a mixture consisting essentially of, in weight percent, 40-66 percent PbO, 30-55 percent P.sub.2 O.sub.5 and an effective concentration up to 12 percent Fe.sub.2 O.sub.3.Type: GrantFiled: March 18, 1987Date of Patent: July 11, 1989Assignee: Martin Marietta Energy Systems, Inc.Inventors: Lynn A. Boatner, Brian C. Sales
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Patent number: 4847008Abstract: Lead-iron phosphate glasses containing a high level of Fe.sub.2 O.sub.3 for use as a storage medium for high-level radioactive nuclear waste. By combining lead-iron phosphate glass with various types of simulated high-level nuclear waste, a highly corrosion resistant, homogeneous, easily processed glass can be formed. For corroding solutions at 90.degree. C., with solution pH values in the range between 5 and 9, the corrosion rate of the lead-iron phosphate nuclear waste glass is at least 10.sup.2 to 10.sup.3 times lower than the corrosion rate of a comparable borosilicate nuclear waste glass. The presence of Fe.sub.2 O.sub.3 in forming the lead-iron phosphate glass is critical. Lead-iron phosphate nuclear waste glass can be prepared at temperatures as low as 800.degree. C., since they exhibit very low melt viscosities in the 800.degree. to 1050.degree. C. temperature range. These waste-loaded glasses do not readily devitrify at temperatures as high as 550.degree. C.Type: GrantFiled: May 23, 1986Date of Patent: July 11, 1989Assignee: The United States of America as represented by the Department of EnergyInventors: Lynn A. Boatner, Brian C. Sales
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Patent number: 4820573Abstract: A fiber glass is provided for filling in a defect or hollow portion of bone. The fiber glass comprises calcium phosphate as a main ingredient and has a negative zeta potential. The calcium phosphate has a molar ratio of Ca/P of not less than 0.2 and less than 0.6 and the total content of CaO plus P.sub.2 O.sub.5 in the fiber glass is less than 80 wt %. The fiber glass is of long filament form or staple fiber form. The fiber glass of long filament form may be woven to form a woven filler.Type: GrantFiled: August 28, 1987Date of Patent: April 11, 1989Assignee: Mitsubishi Mining and Cement Co., Ltd.Inventors: Hideo Tagai, Masahiro Kobayashi, Shigeo Niwa, Hiroyasu Takeuchi, Mikiya Ono
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Patent number: 4771020Abstract: An optical glass which is a P.sub.2 O.sub.5 system glass including ingredients selected from two groups of R.sub.2 O.sub.3 ingredients of specific contents have excellent resistivity to devitrification, homogeneity, light transmissivity and chemical durability.Type: GrantFiled: July 31, 1987Date of Patent: September 13, 1988Assignee: Kabushiki Kaisha OharaInventors: Hajime Omata, Nobuhiro Nozawa
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Patent number: 4770811Abstract: A sensitized laser glass which includes a primary lasing dopant and auxiliary dopants which absorb in regions of the flashlamp emission spectrum away from the absorption bans of the primary dopant and transfer the energy absorbed to the primary dopant, thus improving the efficiency and sensitivity of the laser glass. The auxiliary dopant comprises the combination of cerium and chromium as Ce.sub.2 O.sub.3 and Cr.sub.2 O.sub.3 and the primary dopant is a rare earth metal, preferably neodymium or erbium as Nd.sub.2 O.sub.3 or Er.sub.2 O.sub.3. Th auxiliary dopant consists essentially of 0.1 to 5% by weight Ce.sub.2 O.sub.3 and 0.025 to 0.1% by weight Cr.sub.2 O.sub.3, however the preferred concentration of the auxiliary dopant is 2 to 4% by weight Ce.sub.2 O.sub.3 plus 0.03 to 0.07% by weight Cr.sub.2 O.sub.3. The experimental data establishes that such auxiliary dopants are particularly suitable for phosphate laser glasses.Type: GrantFiled: March 22, 1985Date of Patent: September 13, 1988Assignee: Kigre, Inc.Inventor: John D. Myers
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Patent number: 4735857Abstract: A fiber glass is provided for filling in a defect or hollow portion of bone. The fiber glass comprises calcium phosphate as a main ingredient and has a negative zeta potential. The calcium phosphate has a molar ratio of Ca/P of not less than 0.2 and less than 0.6 and the total content of CaO plus P.sub.2 O.sub.5 less than 80 wt %. The fiber glass is of long filament form or staple fiber form. The fiber glass of long filament form may be woven to form a woven filler.Type: GrantFiled: July 8, 1986Date of Patent: April 5, 1988Assignee: Mitsubishi Mining & Cement Co., Ltd.Inventors: Hideo Tagai, Masahiro Kobayashi, Shigeo Niwa, Hiroyasu Takeuchi, Mikiya Ono
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Patent number: 4703019Abstract: The invention relates to a photosensitive and heat-sensitive glass which is composed of 25-70 mol % of Al.sub.2 O.sub.3 and/or Ga.sub.2 O.sub.3, 30-75 mol % of at least one of CaO, BaO, SrO and MgO and 0-40 mol % of an auxiliary component which is at least one of SiO.sub.2, GeO.sub.2, B.sub.2 O.sub.3 and P.sub.2 O.sub.5. The glass is produced by melting a batch mixture of powdery raw materials. By exposure to UV rays the glass colors in yellowish brown, and the color does not fade by termination of the exposure. Bleaching of the colored glass is accomplished by heating for a short time at about 150.degree.-300.degree. C. Coloration and bleaching can be repeated without deterioration. The same glass turns into an opaline foam glass, which presents a very attractive appearance, by heat treatment at a temperature above the softening temperature. This change is irreversible. The foams created in the glass matrix are usually tens of microns in diameter.Type: GrantFiled: May 9, 1986Date of Patent: October 27, 1987Assignee: Central Glass Company, LimitedInventors: Yoshihiro Abe, Hideo Hosono
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Patent number: 4699889Abstract: A lead phosphate glass to which has been added indium oxide or scandium oe to improve chemical durability and provide a lead phosphate glass with good optical properties.Type: GrantFiled: May 9, 1986Date of Patent: October 13, 1987Assignee: The United States of America as represented by the Department of EnergyInventors: Brian C. Sales, Lynn A. Boatner
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Patent number: 4662924Abstract: A method for molding calcium phosphate type glass, which comprises pouring a melt of calcium phosphate into a mold, and cooling and solidifying it, wherein the mold contains boron nitride at least at the surface thereof.Type: GrantFiled: March 12, 1986Date of Patent: May 5, 1987Assignee: Asahi Glass Company, Ltd.Inventors: Shigeyoshi Kobayashi, Tsuneo Manabe
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Patent number: 4645749Abstract: Low concentration standard aqueous solution for analytical purposes is prepared from a water soluble glass body containing the standardizing material. The glasses are phosphorus pentoxide based glasses and provide release rates, e.g. of Na.sup.++, of 0.01 to 100 micrograms per cm.sup.2 per hour.Type: GrantFiled: June 26, 1985Date of Patent: February 24, 1987Assignee: Standard Telephones and Cables, PLCInventor: Cyril F. Drake
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Patent number: 4626514Abstract: Dental materials using calcium phosphate glass-ceramics and having the color tone with high approximation to that of natural teeth. In those dental materials, calcium phosphate composite, nickel oxide and one or more other type of compounds selected from oxides of iron, manganese, cerium, titanium and tungsten, are contained as coloring component. Also, if necessary, Al.sub.2 O.sub.3 and/or SiO.sub.2 is contained as a color assisting agent in that composite. The calcium phosphate glass-ceramic according to this invention consists of the same components as that of natural teeth. Besides, it is possible to adjust the color tone delicately to match with the color tone of each individual`s teeth. Moreover, the coloring components are incorporated in crystals of calcium phosphate. Consequently, they cause no elution during use and are therefore ideal as dental material.Type: GrantFiled: March 27, 1986Date of Patent: December 2, 1986Assignee: Kyushu Refractories Co., Ltd.Inventors: Akira Watanabe, Yoshimitsu Takeuchi, Hiroyasu Tokuda, Seiji Kihara, Yasuhiro Makino, Keiji Kamegawa
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Patent number: 4612295Abstract: A glass for an eye glass lens comprising a SiO.sub.2 (or B.sub.2 O.sub.3)-CaO-Nb.sub.2 O.sub.5 system as a basic system and having a refractive index of 1.79 or more, an Abbe number of 32 to 38 and a specific gravity of less than 3.6 is disclosed.Type: GrantFiled: April 26, 1984Date of Patent: September 16, 1986Assignee: Hoya CorporationInventor: Hiroji Sagara
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Patent number: 4604097Abstract: A spun or drawn glass fiber for use in the area of medical implants, and particularly as a reinforcement for bioabsorbable polymeric orthopaedic and dental implants. The glass fiber is bioabsorbable and has sufficient tensile strength and elasticity to be used as a reinforcement. It is made up of 5-50% calcium oxide (CaO), 50-95% phosphorous pentoxide (P.sub.2 O.sub.5), 0-5% calcium fluoride (CaF.sub.2), 0-5% water (H.sub.2 O), and 0-10% XO wherein X is either a single magnesium, zinc or strontium ion or two sodium, potassium, lithium, or aluminum ions and when X is aluminum the O represents three oxygen ions.Type: GrantFiled: February 19, 1985Date of Patent: August 5, 1986Assignee: University of DaytonInventors: George A. Graves, Jr., Binod Kumar
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Patent number: 4544974Abstract: There are described a glass composition and a magnetic head containing the same, wherein the glass composition comprises an oxide of an alkali metal or alkaline earth, and at least one non-alkali metal oxide in an amount sufficient to provide a coefficient of thermal expansion of 80-170.times.10.sup.-7 .degree. C..sup.-1, the composition featuring from 5-15 mole % Al.sub.2 O.sub.3 and an amount of a compatible glass former sufficient to insure the Al.sub.2 O.sub.3 is soluble in the composition.Type: GrantFiled: October 20, 1983Date of Patent: October 1, 1985Assignee: Eastman Kodak CompanyInventors: Bradford D. West, Jr., Jean Berchtold
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Patent number: 4544695Abstract: A polymeric flame retardant composition comprises low melting temperature phosphate-sulfate glass compositions in an amount of from about 10 to about 100 parts by weight per 100 parts by weight of said polymer. Desirably, the polymer is a halogen-containing polymer. The phosphate-sulfate combination has been found to produce synergistic results.Type: GrantFiled: September 13, 1984Date of Patent: October 1, 1985Assignee: The B. F. Goodrich CompanyInventor: Ronald E. Myers