Abstract: The invention relates to methods of vitrifying waste and for lowering the melting point of glass forming systems by including lithia formers in the glass forming composition in significant amounts, typically from about 0.16 wt % to about 11 wt %, based on the total glass forming oxides. The lithia is typically included as a replacement for alkali oxide glass formers that would normally be present in a particular glass forming system. Replacement can occur on a mole percent or weight percent basis, and typically results in a composition wherein lithia forms about 10 wt % to about 100 wt % of the alkali oxide glass formers present in the composition. The present invention also relates to the high lithia glass compositions formed by these methods.

Abstract: A method is provided for adjusting, e.g., lowering, the melting and/or forming temperatures of a glass composition without substantially changing the bending and annealing temperatures of the glass composition. The method includes increasing the amount of CaO and decreasing the amount of MgO in the glass composition by the same or about the same amount.

Abstract: An SiO2-TiO2-Li2O-Na2O-based glass composition containing no lead oxide having incorporated therein specific amounts of specific components which are selected from oxides of the metal elements having an atomic number of 30 (Y) to 73 (Ta) and which hardly cause coloration of glass. The glass composition has a desirable refractive index, hardly undergoes devitrification, and hardly develops cracks on ion exchanging and is suitable as glass for a graded index lens.

Abstract: An alkali-free glass essentially consists of, by weight percent, 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, 0-10% ZnO, 0.05-2% SnO2, and 0.005-1% Cl2, and substantially contains no alkali metal oxide.

Abstract: The invention relates to an alkali-free aluminoboro-silicate glass which has the following composition (in % by weight, based on oxide): SiO2 >60-65; B2O3 6.5-9.5; Al2O3 14-21; MgO 1-8; CaO 1-6; SrO 1-9; BaO 0.1-3.5; with MgO+CaO+SrO+BaO 8-16; ZrO2 0.1-1.5; SnO2 0.1-1; TiO2 0.1-1; CeO2 0.01-1. The glass is particularly suitable for use as a substrate glass in display technology.

Abstract: A glass substrate is for use in a WDM optical filter which has an optical multilayer coated on the glass substrate and is formed by glass which has a composition related to the optical multilayer so as to assure stable multiplexing/demultiplexing operation in the optical filter. The glass includes SiO2 as a glass network-former and has an average linear thermal expansion coefficient between 100×10−7/K and 130×10−7/K within a temperature range between −30° C. and +70° C. The glass may include TiO2, Al2O3, and R2O (R: alkali metal element) in addition to SiO2 and may have a hardness suitable for the optical multilayer.

Abstract: An insulator composition which can be sintered at a relatively low temperature and which exhibits a low dielectric constant and a thermal expansion coefficient suitable for forming an insulator layer of a laminated electronic part contains a crystallized glass composition containing SiO2, MgO and CaO as main components, and Al2O3, an amorphous silicate glass composition, and a ceramic composition. The composition ratio by weight % (SiO2, MgO, CaO) of the main components of the crystallized glass composition lies in a region surrounded by point A (30, 25, 45), point B (30, 5, 65), point C (45, 5, 50) and point D (45, 25, 30) shown in a ternary composition diagram thereof. The thermal expansion coefficient of the insulator composition after sintering can easily be changed by changing the content ratio of the crystallized glass composition, the amorphous silicate glass composition and the ceramic composition.

Abstract: The dielectric constant of low loss tangent glass-ceramic compositions, such as cordierite-based glass ceramics, is modified over a range by selective addition of high dielectric constant ceramics, such as titanates, tantalates and carbides and metals, such as copper. The low loss tangent is retained or improved over a range of frequencies, and the low CTE of the glass-ceramic is maintained. BaTiO3, SrTiO3 and Ta2O5 produce the most effective results.

Abstract: An article of manufacture that has a component capable of being sealed with a copper aluminosilicate glass. The sealing glass has a coefficient of thermal expansion (CTEs) of in the range between 20-82×10-7/° C., over a range of 25-500° C.) and a softening points in the range of 660-1000° C. The glass has a composition consisting essentially, in terms of weight percent on an oxide basis, of 35-68 SiO2, 3-25 Al2O3, 2-26 B2O3, 0-20 R2O, 0-30 RO, 2-33 CuO, 0-4 F, 0-10 MxOy, where R2O is an alkali oxide selected from the group consisting of Li2O, Na2O, and K2O, and RO is an alkaline earth oxide selected from the group consisting of CaO, MgO, ZnO, SrO, and BaO, and MxOy is a transition metal oxide selected from the group consisting of Co2O3, TiO2, NiO, MnO2, and Fe2O3. The present invention also pertains to a method of sealing the article.

Abstract: A process is described for the preparation of shaped translucent lithium disilicate glass ceramic products which are characterized by high strength and good chemical stability and may be processed by pressing in the plastic state or milling to finished glass ceramic products which may be used in particular as dental restorations.

Abstract: A glass substrate for magnetic recording medium, having a composition of, in % by weight: 61-70% SiO2, 9-18% Al2O3, 2-4.5% Li2O, 6-13% Na2O, 0-5% K2O, 10-16% R2O (with the proviso of R2O=Li2O+Na2O+K2O), 0-3.5% MgO, 1-7% CaO, 0-2% SrO, 0-2% BaO, 2-10% RO (with the proviso of RO=MgO+CaO+SrO +BaO), 0-2% TiO2, 0-2% CeO2, 0-2% Fe2O3, and 0-1% MnO (with the proviso of TiO2+CeO2+Fe2O3+MnO=0.01-3%). The glass substrate has melting temperature and working temperature suitable for the float process, and has good water resistance and weathering resistance after tempering treatment.

Abstract: A glass consisting essentially of antimony oxide. An optically active glass consisting essentially of antimony oxide and up to about 4 mole % of an oxide of a rare earth element. A rare earth-doped, antimony oxide-containing glass including 0-99 mole % SiO2, 0-99 mole % GeO2, 0-75 mole % (Al, Ga)2O3, 0.5-99 mole % Sb2O3, and up to about 4 mole % of an oxide of a rare earth element. The oxide of the rare earth element may comprise Er2O3. The glass of the invention further includes fluorine, expressed as a metal fluoride. An optical energy-producing or light-amplifying device, in particular, an optical amplifier, comprising the above-described glass. The optical amplifier can be either a fiber amplifier or a planar amplifier, either of which may have a hybrid composition. Embodiments of the glass of the invention can be formed by conventional glass making techniques, while some of the high content antimony oxide embodiments are formed by splat or roller quenching.

Abstract: The lead-free bismuth-containing silicate glasses, which are particularly suitable for use as funnel glass or neck glass for cathode ray tubes and as soldering glass, have the following respective compositions (in % by weight, based on oxide): SiO2 40-60; Bi2O3, 10-30; ZrO2, 0-3; Al2O3, 0.5-5; MgO, 0-6; CaO, 0.5-5; SrO, 1-15; BaO, 0-15; sum of the alkaline earth metal oxides, 2-20; ZnO, 0-2; Li2O, 0-10; Na2O, 1-10; K2O, 2-10; Cs2O, 0-3, sum of the alkali metal oxides, 5-20; CeO2, 0-8; WO3, 0.5-5; MoO3, 0-5 and Sb2O3, 0-0.6; and SiO2 30-50; Bi2O3, 20-40; ZrO2, 0-3; Al2O3, 0.5-5; MgO, 0-4; CaO, 0.5-4; SrO, 1-15; BaO, 0-15; sum of the alkaline earth metal oxides, 2-20; ZnO, 0-2; Li2O, 0-5; Na2O, 1-12; K2O, 2-15; Cs2O, 0-3, sum of the alkali metal oxides, 5-20; CeO2, 0-8; WO3, 0.5-5; MoO3, 0-5 and Sb2O3, 0-0.6.

Abstract: Glass-ceramic sealants for ceramic membrane reactors, ceramic membrane sealed to holders or substrates and methods of making seals between two ceramic materials or between a ceramic and a metal or metal alloy are provided. These sealants combine silicate glass-ceramic materials with selected metal oxides and, optionally, materials similar or identical to the materials being sealed, and employ thermal processing so that the resultant materials will have a thermal expansion coefficient that substantially matches the thermal expansion coefficients of the two materials. Surfaces of the ceramic sealant that are exposed to reactive atmospheres can be protected by providing a metal or metallic alloy layer over the ceramic seal.

Abstract: A glass composition consisting essentially by mol percent of about 55<SiO2<75; 5<BaO<30; and 2 <MgO<22 for use as a matrix of composite materials. A method of making a glass matrix-ceramic particulate composition useful for sealing electrochemical structures, such as solid oxide fuel cells is also disclosed. Method steps include the admixture of finely divided Mg2SiO4 particulates with the matrix glass, to reach an overall composition by mol percent of about 55<SiO2<65; 5<BaO<15; and 25<MgO<35.

Abstract: A low-viscosity dental material contains a non-settling nanoscale filler. Improvements of the mechanical properties of the dental materials, including the abrasive resistance and the compressive strength are provided. Furthermore, the dental materials have increased resistance to microleakage and have increased bond strengths. The filler forms a stable sol with low-viscosity dental materials and the filler may be prepared by surface treatment of fillers having a primary particle size of from about 1 to about 100 nanometers.

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 &agr; 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.

Abstract: A compositional range for a mother glass composition for graded index lenses which has a desired refractive index and is less apt to be devitrified and to develop cracks upon ion exchange was obtained by incorporating at least a given amount of one or more ingredients which are selected from oxides of metal elements ranging from yttrium, atomic number 39, to tantalum, atomic number 73, and which are less apt to cause glass coloration into a glass based on SiO2-TiO2-Li2O-Na2O and containing no lead oxide. In particular, a compositional range in which a large angular aperture is obtained and devitrification is less apt to occur was obtained by incorporating Ta2O5 and ZrO2 in a specific proportion and in specific amounts.

Abstract: A glass for a data storage medium substrate, which consists essentially of the following components as represented by mol %: SiO2 60 to 72, Al2O3  2 to 9 MgO  3 to 9, CaO  2 to 10, SrO  0 to 15, ZnO  0 to 4, TiO2  0 to 8, ZrO2  0 to 4, Li2O  1 to 12, Na2O  0 to 8, K2O  0 to 5, Y2O3  0 to 5, La2O3  0 to 5, and Li2O + Na2O + K2O  4 to 15, and which has a Young's modulus of at least 85 GPa.

Abstract: There is provided a glass-ceramic substrate for an information storage medium usable in an information storage device of the ramp loading system. The glass ceramic substrate has a Young's modulus (GPa)/specific gravity of 37 or over and includes 5.3 to 8 weight percent (expressed on an oxide basis) of Al2O3. The glass ceramic substrate has, as its predominant crystal phases, lithium disilicate (Li2O.2SiO2) and &agr;-quartz (&agr;-SiO2), 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. and has a surface roughness (Ra) (arithmetic mean roughness) of 9 Å or below.

Abstract: A glass composition is disclosed which has a high modulus of elasticity (Young's modulus) and a high rigidity (modulus of elasticity/specific gravity) and is capable of being effectively inhibited from bending or vibrating. Also disclosed is process for producing the glass composition. The glass composition comprises, in terms of mol %, 40 to 65% SiO2, 5 to 25% Al2O3, 2 to 20% Li2O, 0 to 9% Na2O, 0 to 10% TiO2, 0 to 10% ZrO2, 0 to 25% MgO, 0 to 25% CaO, and 0 to 10% SrO, provided that the content of RO (RO=MgO+CaO+SrO) is from 2 to 40% and the sum of (Li2O)/2 and Na2O is from 1 to 10 mol %, said glass composition further containing, as clarifiers, from 0.01 to 5 mol % SnO2 and up to 0.1 mol % sulfur (S) in terms of the amount of SO3.

Abstract: A glass-ceramics having a high elastic modulus, processes for producing the same, and an information recording medium substrate effectively inhibited from bending or vibrating are disclosed. The glass-ceramics has a major crystalline phase which has a Mohs' hardness of 6 or higher and is constituted of crystals containing manganese (Mn).

Abstract: The object of the present invention is to provide an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, whereby energy can be accumulated by radiation excitation, for example, by &ggr;-rays, X-rays, UV-rays, etc. and light emission can be continued for a long time even after stopping the excitation. That is, the present invention relates to an oxide glass capable of exhibiting a long lasting afterglow and photostimulated luminescence, characterized by a constitutional composition comprising, at least, terbium oxide (Tb2O3) or manganese oxide (MnO), gallium oxide (Ga2O3) or aluminum oxide (Al2O3), alkali metal oxide or alkaline earth metal oxide and boron oxide (B2O3) or silicon oxide (SiO2) or zinc oxide (ZnO).

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.

Abstract: A glass composition is disclosed which has a high modulus of elasticity (Young's modulus) and a high rigidity (modulus of elasticity/specific gravity) and is capable of being effectively inhibited from bending or vibrating. Also disclosed is a substrate for information recording media, which comprises the glass composition. The glass composition comprises the following components in terms of mol %: 50 to 64% SiO2, 6 to 18% Al2O3, 7 to 15% Li2O, 3 to 12% Na2O, 0 to 2% K2O, 0 to 10% TiO2, 0 to 4% ZrO2, 0 to 6% MgO, 0 to 9% CaO, and 0 to 6% SrO, provided that the content of RO (RO=MgO+CaO+SrO) is from 2 to 15%.

Abstract: Potassium-zinc-silicate glasses are described which because of their high chemical stability as well as their optical properties and favorable working properties are suitable in particular as coating or veneering materials for ceramic dental suprastructures and thus for the preparation of all-ceramic dental restorations, such as crowns or bridges.

Abstract: A mineral fiber composition which is soluble in biological fluids contains substantially 45-65% by weight of SiO2 15-40% by weight of CaO 0-20% by weight of MgO 0-6% by weight of Na2O+K2O and in addition aluminium and/or iron oxides as well as phosphorus oxide in such amounts that the weight ratio of P2O5 to the sum of Al2O3 and iron oxide is circa 0.4 to 6.

Abstract: The use of P2O5 and or B2O3 as a component to improve the refractoriness of inorganic fibres comprising SiO 2, and CaO and/or MgO is described. The inorganic fibres have a composition such that SiO 2+P2O5 (58+(if MgO 10, 0.5×(MgO10) else 0)) 2.4 wt. %.

Abstract: 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.

Abstract: A glass having an oxide-converted composition of 35 to 65 wt % of SiO2, 5 to 35 wt % of B2O3, 2 to 20 wt % of CaO, 5 to 25 wt % of Al2O3 where the ratio of CaO to Al2O3 is 1/1 to 1/2.5, 0.5 to 5 wt % of TiO2, 0.5 to 5 wt % of ZrO2, 0.5 to 5 wt % of ZnO, 0 to 5 wt % of MgO, 0 to 5 wt % of SrO, 0 to 5 wt % of BaO and 0 to 1 wt % of the total of group 1A element oxides such as Na2O, K2O and Li2O, or a glass having an oxide-converted composition of 10 to 45 wt % of SiO2, 20 to 50 wt % of CaO, 20 to 45 wt % of Al2O3, 0.1 to 5 wt % of MgO, 0.1 to 5 wt % of SrO, 0.1 to 5 wt % of BaO, 0.1 to 5 wt % of TiO2, 0.1 to 5 wt % of ZnO, 0.1 to 5 wt % of ZrO2 and 0 to 3 wt % of a group 1A element oxide has a low glass softening point, can be calcined as a composite with a variety of ceramics at a temperature below 1000° C., precipitates crystals during the calcination process, and can provide a glass ceramic exhibiting a low dielectric constant and a low dielectric loss.

Abstract: The present invention provides a glass-ceramic glaze composition for use in the production of ceramic tile. The glaze composition comprises a glass composition from which diopside crystals can be formed, a diopside crystallization rate controller, a surface texture controller, and other optional fillers, pigments and additives. Preferably, the glass composition comprises one or more glass frits containing precursors from which diopside crystals can be formed. The diopside crystallization rate controller comprises mill added sodium feldspar, potassium feldspar, nepheline, and/or spodumene, with sodium feldspar being preferred. The surface texture controller preferably comprises zinc oxide and calcined alumina. When fired on a ceramic tile, the glaze composition of the present invention provides a semi-transparent to translucent, smooth matte finish that displays excellent chemical durability and abrasion resistance.

Abstract: A glass ceramic sintered product obtained by sintering a mixture powder containing a BaO-containing glass, metal oxide particles having a coefficient of linear thermal expansion at 40 to 400° C. of not smaller than 6 ppm/°C., and a Zr compound and, particularly, containing the Zr compound in an amount of from 0.1 to 30% by weight calculated as Zr02, and exhibiting a coefficient of linear thermal expansion at 40 to 400° C. of from 8.5 to 18 ppm/°C. The glass ceramic sintered product exhibits excellent resistance against chemicals and does not discolor even when subjected to treatment with an acidic or alkaline solution in the step of plating. A wiring board using the glass ceramic sintered product as an insulating substrate exhibits a coefficient of linear thermal expansion substantially similar to that of an external circuit board, effectively suppressing the occurrence of thermal stress and cracking.

Abstract: A process is described for the preparation of shaped translucent lithium disilicate glass ceramic products which are characterized by high strength and good chemical stability and may be processed by pressing in the plastic state or milling to finished glass ceramic products which may be used in particular as dental restorations.

Abstract: A glass composition is disclosed which has a high modulus of elasticity (Young's modulus) and a high rigidity (modulus of elasticity/specific gravity) and is capable of being effectively inhibited from bending or vibrating. Also disclosed is a substrate for information recording media, which comprises the glass composition. The glass composition comprises the following components in terms of mol %: 40 to 60% SiO2, 8 to 25% Al2O3, 2 to 20% Li2O, 0 to 5% Na2O; provided that the content of R2O (R2O=Li2O+Na2O) is from 2 to 20%, 0 to 10% TiO2, 0 to 10% ZrO2, 5 to 25% MgO, 0 to 25% CaO and 0 to 6% SrO, provided that the content of RO (RO=MgO+CaO+SrO) is from more than 15 to 40%.

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 &agr; 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.

Abstract: A glass composition is disclosed which has a high modulus of elasticity (Young's modulus) and a high rigidity (modulus of elasticity/specific gravity) and is capable of being effectively inhibited from bending or vibrating. Also disclosed is a substrate for information recording media which comprises the glass composition. The glass composition comprises the following components, in terms of mol %: 55 to 65% SiO2, 0.5 to less than 6% Al2O3, 12 to 22% Li2O, 0 to 5% Na2O, 0 to 10% TiO2, 0 to 3% ZrO2, 0 to 8% MgO, 0 to 18% CaO, and 0 to 6% SrO, provided that the content of RO (RO=MgO+CaO+SrO) is 5 to 18%.

Abstract: The subject of the invention is a glass composition intended to be converted into glass ribbon, comprising the constituents below in the following proportions by weight: SiO2 55-71% Al2O3 >2% MgO 4-11%, and > 8% if Al2O3 < 5% Na2O 9-16.5% K2O 4-10%.

Abstract: Oxynitride glass whose composition is represented by Al—Si—O—N or M—Al—Si—O—N (where M denotes Ca, Mg, or rare earth element), wherein the content of O and N as non-metallic components is in the range of 0 eq %<N≦30 eq %, with O+N=100 eq %, the content of M, Al, and Si as metallic components is in the range of 20 eq %≦Al≦30 eq % and 70 eq %≦Si≦80 eq %, respectively, with Al+Si=100 eq % (if M does not exist) and the content of M, Al, and Si as metallic components is within the hatched area in the composition diagrams shown in FIGS. 1 to 3, if M is Ca, Mg, or rare earth metal, or within the hatched area in the composition diagrams shown in FIGS. 4 to 8, if the content of N is in the range of 5 eq %≦N≦25 eq %. This glass is superior in specific rigidity and fabricability. It contains nitrogen in a controlled amount so that it has improved specific rigidity without its specific gravity increasing.

Abstract: Glasses are disclosed which are used to produce substrates in flat panel display devices. The glasses exhibit a density less than about 2.45 gm/cm3 and a liquidus viscosity greater than about 200,000 poises, the glass consisting essentially of the following composition, expressed in terms of mol percent on an oxide basis: 65-75 SiO2, 7-13 Al2O3, 5-15 B2O3, 0-3 MgO, 5-15 CaO, 0-5 SrO, and essentially free of BaO. The glasses also exhibit a strain point exceeding 650° C.

Abstract: A glass for a substrate, having an average thermal expansion coefficient in the range of from 60×10−7 to 75×10−7/° C. at 50 to 350° C., which consists essentially of the following composition expressed by wt %: wt % SiO2 more than 62 to 74, Al2O3  1 to 15, MgO  0 to 9, CaO  0 to 14, Na2O  0 to 12, K2O  0 to 13, SiO2 + Al2O3 72 to 82, MgO + CaO  5 to 24, Na2O + K2O  1 to 15, MgO + CaO + Na2O + K2O 18 to 28.

Abstract: A living tissue replacement of crystallized glass having bioaffinity and mechanical strength is briefly obtained simply by pressure molding or machining without using a special equipment. A glass material having a softening point below its crystallization temperature and exhibiting viscous flow at temperatures below its melting point is heated at a temperature above its Tg and pressed at the temperature to mold to a desired shape, thereby manufacturing a living tissue replacement such as a dental crown. Molding can be done under a pressure of up to 20 MPa.

Abstract: Alkali silicate glasses are described which, in view of their good chemical stability and their optical properties and processing properties, are particularly suitable as a coating or veneering material for ceramic dental frameworks and hence for the production of all-ceramic dental restorations such as crowns or bridges.

Abstract: A glass composition is disclosed which has a high modulus elasticity (Young's modulus) and a high rigidity (modulus of elasticity/specific gravity) and is capable of being effectively inhibited from bending or vibrating. Also disclosed is a process for producing the glass composition. The glass composition comprises, in terms of mol %, 40 to 65% SiO2, 5 to 25% Al2O3, 2 to 20% Li2O, 0 to 9% Na2O, 0 to 10% TiO2, 0 to 10% ZrO2, 0 to 25% MgO, 0 to 25% CaO, and 0 to 10% SrO, provided that the content of RO (RO=MgO+CaO+SrO) is from 2 to 40% and the sum of (Li2O)/2 and Na2O is from 1 to 10 mol %, said glass composition further containing, as clarifiers, from 0.01 to 5 mol % SnO2 and up to 0.1 mol % sulfur (S) in terms of the amount of SO3.

Abstract: A glass for a substrate consisting essentially of: SiO2 45 to 65 wt %, Al2O3 6 to 20 wt %, B2O3 0.5 to 6 wt %, MgO 2 to 5 wt %, CaO 1 to 10 wt %, SrO 0 to 6.5 wt %, BaO 0 to 2 wt %, MgO + CaO + SrO + BaO 10 to 17 wt %, ZrO2 0 to 7 wt %, and Na2O + K2O 7 to 15 wt %.

Abstract: These sealing glass frits are a class of frits that seal in the intermediate temperature range of 600°-800° C. The frits are based on high strain point/high CTE alkali-zinc-silicate glass compositions. The sealing frits are useful in planar solid oxide fuel cells (SOFC).

Abstract: An apatite glass ceramic is described which is characterized by good chemical stability, a low expansion coefficient and high translucence, and is particularly suitable, by itself or together with glasses or other glass ceramics, as a veneering material for ceramic dental restorations.

Abstract: Novel boron-free glass compositions are described which are particularly suited for making fine diameter glass fibers for HEPA electronic clean-room filtration media using flame-attenuation or rotary glass processing.

Abstract: The present invention provides an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, can be used not only as a material for confirming an infrared laser or controlling an optical axis, but also as a material for recording or reproducing of &ggr;-rays, X-rays or UV-rays images and further can be used as an optical recording material of such a type that can be read. This glass material is represented, in term of atoms for making up the glass, by the following chemical composition (mol %): GeO2 21 to 80% ZnO 0 to 50% Ga2O2 0 to 55% (ZnO + Ga2O3 = 3 to 55%) Tb2O3 0 to 10% MnO 0 to 2% (Tb2O3 + MnO = 0.01 to 10%) R2O 0 to 45% (R: at least one atom selected from Li, Na, K and Cs) R′O 0 to 40% (R′: at least one atom selected from Mg, Ca, Sr and Ba) R2O + R′O 0.

Abstract: A plate glass containing B2O3, having a total content of Li2O, Na2O and K2O of from 0 to 13 mol %, a content of BaO of from 0 to 0.8 mol % and a content of SiO2 of from 50 to 75 mol %, and having an average linear thermal expansion coefficient of from 75×10−7 to 120×10−7/° C. in a range of from 50 to 350° C., a strain point of at least 550° C., a density of at most 2.65 g/cm3 at 20° C. and an oxygen atom density of from 7.2×10−2 to 9.0×10−2 mol/cm3 at 20° C.

Abstract: The invention relates to an ultraviolet ray absorbing soda-lime glass. This glass contains less than 0.10 wt % of iron in terms of Fe2O3, which is optionally contained as an impurity in the glass, 0.7-2.6 wt % of CeO2, 0-1.3 wt % of TiO2, 0-0.12 wt % of V2O5, 0.08-0.30 wt % of sulfur in terms of SO3, and 0-0.0025 wt % of CoO. The glass at a thickness of 5 mm is not higher than 10% in ultraviolet radiation transmittance, is not lower than 80% in visible light transmittance, and is from 530 to 575 nm in dominant wavelength. The glass is transparent and clear, superior in ultraviolet ray absorption capability, and high in visible light transmittance.