Abstract: The invention relates to the use of ions of weakly basic oxides as linking ions for polyacids in cements, preferably polyelectrolyte cements. Suitable ions comprise elements of the scandium series, for example, Sc3+, Y3+, La3+, Ce4+ and all subsequent tri- and tetra-valent lanthanides and the ions Mg2+, Zn2+, Ga2+, In2+. The application of said ions permits a regulation of the cement reaction without surface treatment of the glass powder.

Abstract: An infra-red absorption glass for a reed switch is suitable for encasement of a reed switch using magnetic wire members made of Fe—Ni based alloy (52 alloy). In the infra-red absorption glass, an infra-red transmittance at a wavelength of 1050 nm is not greater than 10% for a thickness of 0.5 mm and the content of Cl in the glass is not greater than 150 ppm. In the glass, a coefficient of thermal expansion in a temperature range between 30 and 380° C. is preferably 85-100×10−7/° C. In addition, the infra-red absorption glass preferably has a composition consisting essentially of, by weight percent, 60-75% of SiO2, 1-10% of Al2O3, 0-10% of B2O3, 3.5-10% of RO (R being one or more selected from Ca, Mg, Ba, Sr, and Zn), 0.5-5% of Li2O, 8-17% of Na2O+K2O, 2-10% of Fe3O4.

Abstract: The invention relates to the use of a mixture of bioactive glass and dental glass for producing an agent for a permanent dental filling. The bioactive glass is preferably contained in a binding agent for binding a dental filling to a tooth, in a glass-ionomer cement, in a glass-plastic composite, in a composite-reinforced glass-ionomer cement and/or in an agent for treating the tooth root, the neck of the tooth and/or the tooth crown and preferably contains fluoride ions.

Abstract: A laminated glass having a low haze ratio and an excellent infrared rays shield performance and a glass composition suitable for use in a laminated glass and easy with respect to melting and molding works, which is a glass composition comprising 65 to 74% of SiO2, 0 to 5% of B2O3, 1.9 to 2.5% of Al2O3, 1.0 to 3.0% of MgO, 5 to 10% of CaO, 0 to 10% of SrO, 0 to 10% of BaO, 0 to 5% of Li2O, 13 to 17% of Na2O, 0.5 to 5% of K2O, 0 to 0.40% of TiO2 and 0.3 to 2.0% of total iron oxide in terms of Fe2O3, on a weight basis, in which the sum of MgO, CaO, SrO and BaO is from 10 to 15% and the sum of Li2O, Na2O and K2O is from 14 to 20%, wherein the glass composition has a visible light transmittance of 80% or more as measured with the CIE Standard illuminant A and a total solar energy transmittance of not more than 62% at a thickness of 2.1 mm, and a laminated glass using a glass sheet made of that glass composition.

Abstract: The present invention is a green soda-lime-silica glass composition. The composition comprises 68 to 75% SiO2, 10 to 18% Na2O, 5 to 15% CaO, 0 to 10% MgO, 0 to 5% Al2O3, and 0 to 5% K20, where CaO+MgO is 6 to 15% and Na2O+K20 is 10 to 20%, and colorants comprising: 0.3 to 0.8 wt. % total iron as Fe2O3 wherein the ratio of FeO/total Fe as Fe2O3 is 0.35 to 0.62; 0.05 to 0.5 wt. % manganese compound as MnO2; 0 to 0.1 wt. % titanium oxide as TiO2; and 0 to 1 wt. % cerium oxide as CeO2. The colored glass has the following spectral properties at 4.0 mm. thickness: 65 to 81% light transmittance using Illuminant A (LTA) and using Illuminant C has a dominant wavelength of 494 to 555 nanometers with an excitation purity of 2 to 9%.

Abstract: A silicate based composition for optical glass used as a substrate for thin film optical interference filters having a stable transmission band center wavelength and bandwidth has a relatively high coefficient of thermal expansion, high Young's modulus and high optical transmittance in the near infrared (NIR) wavelength range of about 950 nm to about 1600 nm. The coefficient of thermal expansion of the glass composition is adjustable to particular values to result in minimal wavelength shift in filters made by depositing thin films of particular dielectric materials onto a substrate made of the glass, the composition being varied from a preferred baseline composition consisting of about 43.2% SiO2, 7% Al2O3, 12.7% CaO, 7.3% SrO, 7.8% Li2O, 13.2% Na2O, 8.0% K2O, 0.7% ZrO, and 0.1% Sb2O3, the baseline composition having a coefficient of thermal expansion of about 112×10−7/° C. over the temperature range of −30° C. to +70° C., a Young's modulus E of 88.

Abstract: A glass composition including from 0.10 to 2.0% yttrium oxide (e.g., Y2O3) and employing in its colorant portion iron (total iron expressed as Fe2O3), erbium (e.g., Er2O3), and/or holmium (e.g., Ho2O3). In certain embodiments, the glass may be grey in color.

Abstract: A glass article of the present invention has a rate of dissolution in an acidic liquid of from 10 to 100 nm/min in terms of etching rate in immersing in a 0.1% by weight 50° C. aqueous solution of hydrofluoric acid and an average linear thermal expansion coefficient of 70×10−7/° C. or higher as measured in the range of from −50° C. to 70° C., and the working temperature T4 (° C.) and the liquidus temperature TL (° C.) thereof satisfy the relationship: T4−TL≧−100° C.

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, 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.

Abstract: A light blue flat glass which is soda-lime-silica glass and which contains Nd in such an amount that the content based on Nd2O3 represented by mass percentage, is from 0.001 to 0.1%, and no Co or Co in such an amount that the content based on CoO as represented by mass percentage, is less than 0.1 ppm.

Abstract: A glass ceramic, for use as a resistor or a gas-tight glass ceramic solder for use in a spark plug, includes a fused seal of a starting glass fused from a starting mixture containing SiO2, Al2O3, TiO2 and CaO, the fused seal including crystalline phases in at least some areas. A method for producing such a glass ceramic provides for the starting glass to be processed in a first method step to form a starting material, which is heated for a first period of time in a second method step from a starting temperature, which is below the softening temperature of the starting glass, to a fusion temperature, which is above the softening temperature of the starting glass, and is kept at that temperature for a second period of time and finally is cooled again. A spark plug may include a terminal stud and a center electrode, which are electrically connected across a resistor that is formed in at least some areas by the glass ceramic.

Abstract: In a sintered glass ceramic product including at least three layers each of which is formed by a glass ceramic material, the layers are stacked to be substantially symmetrical in a stacking direction and integrally sintered. Among the sintered layers, each of outermost layers and an inner layer adjacent thereto have crystal phases different from each other. Each of the outermost layers and the inner layer have thermal expansion coefficients &agr;1 and &agr;2 selected so that the relationship given by 0<&agr;2−&agr;1<5 ppm is satisfied.

Abstract: A glass having a visible transmission of no greater than 28% and low IR transmission, and employing a colorant portion: 1 total iron (expressed as Fe2O3):  0.7 to 1.8% cobalt oxide (e.g., Co3O4): 0.001 to 1.0% titanium oxide (e.g., TiO2):  0.25 to 3.0% selenium (e.g., Se):    0 to 0.0020% chromium oxide (e.g., Cr2O3):    0 to 0.010%.

Abstract: The invention describes a lead-free and arsenic-free special short flint glass with a refractive index 1.60≦nd<1.65, an Abbe number of 41≦&ngr;d<52, a relative partial dispersion 0.551≦PgF<0.570 in the blue spectral region, a relative partial dispersion 0.507≦PCs≦0.525 in the red spectral region, a negative deviation of the relative partial dispersion from the normal line &Dgr; Pg,F≦−0.0045 and an improved chemical resistance which has the following composition (in % by weight): 1 SiO2 >50-65   Al2O3 0-7 B2O3 0-6 Li2O 0-6 Na2O  3-11 K2O 0-6 MgO  0-12 CaO  1-12 BaO 0-8 La2O3  0-15 Ta2O5  0-10 Nb2O5  4-20 ZrO2 >10-20   &Sgr;(CaO + MgO + BaO)  1-25 &Sgr;(Na2O + K2O + Li2O)  3-20 SiO2/(ZrO2 + La2O3 + Nb2O5 + Ta2O5) 1.5-2.

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.

Abstract: The present invention provides a glass fiber composition comprising: 52 to 62 percent by weight SiO2, 0 to 2 percent by weight Na2O, 16 to 25 percent by weight CaO, 8 to 16 percent by weight Al2O3, 0.05 to 0.80 percent by weight Fe2O3, 0 to 2 percent by weight K2O, 1.7 to 2.6 percent by weight MgO, 0 to 10 percent by weight B2O3, 0 to 2 percent by weight TiO2, 0 to 2 percent by weight BaO, 0 to 2 percent by weight ZrO2, and 0 to 2 percent by weight SrO, and further including at least one material selected from the group consisting of: 0.05 to 1.5 percent by weight Li2O, 0.05 to 1.5 percent by weight ZnO, 0.05 to 3 percent by weight MnO, and 0.05 to 3 percent by weight MnO2, wherein the glass composition has a forming temperature of no greater than 2280° F. based on an NIST 714 reference standard and a liquidus temperature of no greater than 2155° F.

Abstract: A blue-green colored glass composition includes a base portion, such as a conventional soda-lime-silica base, and major colorants. In one embodiment, the major colorants include 0.7 to 0.9 weight percent total iron (Fe2O3), 0.2 to 0.3 weight percent FeO, and 0 to 5 ppm CoO. The glass is characterized by a dominant wavelength in the range of 490 nm to 495 nm and an excitation purity in the range of 3% to 11%. The glass of the invention can be essentially free of Se.

Abstract: The invention relates to low-alkali or alkali-free alkaline-earth aluminoborosilicate glasses of the following composition (in wt.-% on an oxide basis) SiO2>49-65; B2O3 0.5-4.5; Al2O3>10-23; MgO>2.7-7; CaO 0.5-10; SrO>15-22; BaO 0.5-7; provided that MgO+CaO+SrO+BaO>20-35; SnO2 0-2; ZrO2 0-2; ZrO2 0-2; TiO20-2; CeO20-1.5; ZnO 0-1; Na2O 0-2; K2O 0-2; provided that Na2O+K2O equals 0-3. The inventive glasses are especially suitable for use as substrates in thin film photovoltaic technology and as glasses for bulbs.

Abstract: The present invention provides a high redox, ultraviolet and/or infrared absorbing radiation absorbing, and colored glass using a standard soda-lime-silica glass base composition and additionally at least on essential solar absorbing and colorant set of components. The solar absorbing flat glass article has two opposing major surfaces with a thickness of 1.5 to 12 mm. and a redox value in the range of greater than 0.38 to about 0.6, a retained sulfate measured as (SO3) value in the range of greater than 0.005 to less than 0.18 weight percent, and is essentially free of coloration from inorganic polysulfides.

Abstract: The present invention relates to a container for high-grade natural products and a glass composition for such a container. Natural products, such as natural dietary supplements, phyto-therapeutic agents, etheric oils or homeopathic medicines, are high-grade products and can be stored in such a container. The container is made of clear glass in which the composition of the glass has incorporated therein particular mineral oxides including at least aluminum oxide, silicon oxide, sodium oxide, potassium oxide, magnesium oxide, calcium oxide, cobalt oxide, nickel oxide, manganese oxide, chromium oxide, iron oxide, and titanium oxide, such that the glass is capable of substantially blocking visible light but allowing for the transmittance of ultraviolet and infrared light.

Abstract: A special glass formed by maintaining a high redox ratio, and a large amount of total iron. The redox is preferably maintained at greater than 50 percent, more preferably greater than 80 percent. The total iron is maintained at least that 0.5 percent, and more preferably at 0.8 percent or greater.

Abstract: The present invention can provide an alkali free glass containing as a refining agent, a tin oxide and at least one selected from the group consisting of a cerium oxide, a manganese oxide, a tungsten oxide, a tantalum oxide and a niobium oxide.

Abstract: A glass substrate of the present invention for magnetic recording media having high heat resistance and easy chemical strengthening ability at once has not been obtained, which is a glass composition essentially comprising 60 to 70 wt % SiO2, 5 to 20 wt % Al2O3, 0 to 1 wt % Li2O, 3 to 18 wt % Na2O, 0 to 9 wt % K2O, 0 to 10 wt % MgO, 1 to 15 wt % CaO, 0 to 4.5 wt % SrO, 0 to 1 wt % BaO, 0 to 1 wt % TiO2 and 0 to 1 wt % ZrO2, wherein the sum of Li2O, Na2O and K2O is from 5 to 25 wt %, and the sum of MgO, CaO, SrO and BaO is from 5 to 20 wt %.

Abstract: Glass is provided so as to have high visible transmission and/or fairly clear or neutral color. In certain example embodiments of making glass according to examples of the invention, the glass batch may include a base glass (e.g., soda lime silica base glass) and, in addition, by weight percentage: 1 total iron (expressed as Fe2O3):  0.01 to 0.30% erbium oxide (e.g., Er2O3):  0.01 to 0.30% cerium oxide (e.g., CeO2): 0.005 to 0.30%.

Abstract: Mathematical relationship for ingredients for fiber glass compositions are use to identify properties of the glass. In particular the forming temperature and delta T. In one embodiment, the mathematical relationship of the ingredients is of a generic quaternary SiO2, CaO, Al2O3 and MgO glass system. The relationship of SiO2, CaO, Al2O3 and MgO of interest include RO=CaO+MgO, SiO2/CaO, SiO2/RO, SiO2/Al2O3; Al2O3/CaO; SiO2+Al2O3; SiO2−RO and Al2O3/RO or RO/Al2O3. when other ingredients or components are added to the glass batch materials to alter the forming and/or liquidus temperatures of the glass, for example Na2O, Li2O, K2O and B2O3 the following mathematical relationships are of interest, (SiO2+Al2O3)/(R2O+RO+B2O3) where RO is as previously defined and R2O=Na2O+Li2O+K2O. Each of the compositional features of the glass identified above reflects the relative balance between the fluidity (i.e.

Abstract: A CRT funnel of a non beam-index type is made of a lead glass which contains 10-30 mass % of PbO and has an X-ray absorption coefficient of 40 cm−1 or more at 0.6 Å. The lead glass further contains Sb2O3 and an additive including at least one of CeO2 and SnO2. In case where the additive includes CeO2, it is preferable that the content of CeO2 is not smaller than 0.01 mass % and is smaller than 0.5 mass %. In case where the additive includes SnO2, the content of SnO2 preferably falls within a range of 0.001-2 mass %.

Abstract: A tungsten sealing glass for use in a fluorescent lamp has 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, 0-10% TiO2+Sb2O3+PbO, and 0-2% ZrO2, where Na2O/(Na2O+K2O)≦0.6.

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: The silicate glass has a composition (in % by weight, based on oxide) of SiO2, 54-72; Al2O3, 0.5-7; ZrO2, 10-20; B2O3, 0-<5; Na2O, 3-<8; K2O, 0-5; with Na2O+K2O, 2-<8; CaO, 3-11; MgO, 0-10; SrO, 0-8; BaO, 0∝10; with CaO+MgO+SrO+BaO, >5-24; La2O3, 0-5; and TiO2, 0-4. The glass also contains at least 0.6 percent by weight of La2O3 or at least 0.1 percent by weight TiO2. The glass has a hydrolytic resistance in hydrolytic glass 1, an acid resistance in acid class 3 or better, preferably acid class 1, a caustic lye resistance in lye class 1, a glass transition temperature (Tg) of at least 650° C., a thermal expansion coefficient (&agr;20/300) of 4.1×10−6 to 7.4×10−6/K, a refractive index (nd) of 1.53 to 1.63, an Abbé number (&ngr;d) of 48 to 58 and a negative anomalous partial dispersion in a blue spectral region (&Dgr;Pg,F) of up to −0.0130.

Abstract: The silicate glass has a composition (in % by weight, based on oxide) of SiO2, 54-72; Al2O3, 0.5-7; ZrO2, >10-<18; B2O3, 0-<5; Na2O, 2-<10; K2O1 0-5; with Na2O+K2O, 2-<10; caO, 3-11; MgO, 0-10; SrO, 0-8; BaO, 0-12; with CaO+MgO+SrO+BaO, >5-24; La2O3, 0-6; and TiO2, 0-4. The glass has at least 0.6% by weight of La2O3 or at least 0.1% by weight TiO2. The glass is in hydrolytic glass 1, acid class 3 or better, preferably acid class 1, and lye class 1. It has a glass transition temperature (Tg) of at least 640° C., a thermal expansion coefficient (&agr;20/30O) of 4.1×10−6 to 8.0×10−6/K, a refractive index (nd) of 1.53 to 1.63, an Abbé number (&ngr;d) of 47 to 66 and a negative anomalous partial dispersion in a blue spectral region (&Dgr;Pg,F) of up to −0.0130.

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: 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 for shifting the absorption peak wavelength in the wavelength range 900-1600 nm of an infrared radiation absorbing glass from less than 1100 nm to 1100 nm or longer without substantially changing the tint of the glass, comprising the step of irradiating with ultraviolet light of 400 nm or shorter at an energy density of 1.0×106 J/m2/hr or more to increase the content of FeO in the irradiated glass by reducing Fe (III) to Fe (II), the ultraviolet light irradiated glass thereby comprising 0.02 wt. % or more FeO in terms of Fe2O3. The glass to be irradiated comprises, in % by weight: 65 to 80% SiO2, 0 to 5% Al2O3, 0 to 10% MgO, 5 to 15% CaO, 10 to 18% Na2O, 0 to 5% K2O, 5 to 15% MgO+CaO, 10 to 20% Na2O+K2O, and 0 to 5% B2O3; 0.02% or more total iron oxide (T-Fe2O3) in terms of Fe2O3, 0 to 2.0% CeO2, 0 to 1.0% TiO2, 0 to 0.005% CoO, and 0 to 0.005% Se.

Abstract: Glass is provided so as to have high visible transmission and/or fairly clear or neutral color. In certain example embodiments of making glass according to examples of the invention, the glass batch may include a base glass (e.g., soda lime silica base glass) and, in addition, by weight percentage: total iron (expressed as Fe2O3): 0.01 to 0.30% erbium oxide (e.g., Er2O3): 0.01 to 0.30% cerium oxide (e.g., CeO2): 0.005 to 0.30%.  Optionally, neodymium oxide (e.g., Nd2O3) may also be provided in the glass in certain example embodiments. In other embodiments, the cerium oxide may be replaced with or supplemented by NaNO3 or some other nitrate(s) as an oxidizer.

Abstract: A glass for a cathode ray tube which glass can be decreased in thickness and weight, a glass panel for a cathode ray tube, a cathode ray tube and methods for producing them. Strengthened glass having a high bending strength and a thick stress-strain layer, a glass for a display which is made of the strengthened glass, particularly, a glass panel for a cathode ray tube and a cathode ray tube. The glasses include (1) a glass for a cathode ray tube which is made of a chemically strengthened glass and has a Young's modulus of at least 90 GPa, (2) a glass for a cathode ray tube, which is a chemically strengthened glass from a matrix glass which contains SiO2, Al2O3, an alkali metal oxide, SrO and ZrO2 and has an Al2O3 content of more than 4% by weight but not more than 20% by weight and an SrO content of 5 to 20% by weight, and (3) a strengthened glass formed by chemical strengthening of a physically strengthened matrix glass at a temperature lower than the strain temperature of the matrix glass.

Abstract: Glass is made from batch components having a source of ferrous iron to increase the starting amount of ferrous iron in the glass batch. The ferrous iron source is an iron silicate material, such as fayalite (2FeO.SiO2), iron garnet (3FeO.Fe2O3.3SiO2) magnesium-iron olivine (2(Mg,Fe)O.SiO2), grunerite (6FeO.8SiO2FeOH)2, actinolite (CaO.3(Mg,Fe)O.4SiO2) or iron rich anthophyllite ((Mg,Fe)O.SiO2). The presence of the ferrous iron source in the glass batch components decreases or eliminates the amount of coal and also leads to a glass article having a redox ratio greater than about 0.25.

Abstract: An ultraviolet ray-absorbing, colorless and transparent soda-lime-silica glass is disclosed, which glass is prepared by irradiating a cerium containing soda-lime-silica glass with light having wavelengths in far- to near-ultraviolet region and thereby reducing transmittance to light with wavelengths in the region of 300-400 nm.

Abstract: The present invention is a blue soda-lime-silica glass composition. The composition comprises 68 to 75% SiO2, 10 to 18% Na2O, 5 to 15% CaO, 0 to 10% MgO, 0 to 5% Al2O3, and 0 to 5% K2O, where CaO+MgO is 6 to 15% and Na2O+K2O is 10 to 20%, and colorants comprising: 0.3 to 0.8 wt. % total iron oxide as Fe2O3 wherein the ratio of FeO/total Fe as Fe2O3 is 0.35 to 0.62; 0.05 to 0.5 wt. % manganese compound as MnO2, 0 to 0.30 wt. % titanium oxide as TiO2; and 0 to 0.8 wt. % cerium oxide as CeO2. The colored glass has the following spectral properties at 4.0 mm. thickness: 65 to 81% light transmittance using Illuminant A (LTA) and using Illuminant C has a dominant wavelength of 488 to 494 nanometers with an excitation purity of 4 to 11%.

Abstract: The invention concerns a colored soda glass of green shade comprising at most 0.27 wt. % of FeO and has under a standard illuminant A and for a thickness of 4 mm, a light transmission (TLA-4) less then 70%, a selectivity (SE4) higher than 1.50 and an ultraviolet radiation transmission (TUV4) less than 20%. Said glass is particularly suited for vehicle side glazing and rear windows.

Abstract: A high transmittance glass sheet is provided that is formed of a soda-lime-silica glass composition containing, expressed in wt. %, less than 0.020% of total iron oxide in terms of Fe2O3 and 0.006 to 2.0% of zinc oxide. The glass sheet allows the formation of nickel sulfide particles to be suppressed by the addition of a zinc compound to a glass raw material.

Abstract: An alkali-free glass applicable to a light transparent glass substrate in a liquid crystal display essentially consists, by weight, of basic elements of 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, and 0-10% ZnO, and a fining agent of a combination of 0.05-3% Sb2O3 and at least one of 0.05-2% SnO2 and 0.005-1% Cl2, which fining agent makes the resultant glass free from bubbles without the use of toxic As2O3 which has been known as the fining agent in the art.

Abstract: The present invention is to provide a high transmittance glass sheet that has a composition containing as coloring components, expressed in wt. %, 0.005 to less than 0.02% of total iron oxide in terms of Fe2O3, less than 0.008% of FeO, and 0 to 0.25% of cerium oxide and having a ratio of FeO in terms of Fe2O3 to the total iron oxide of lower than 40%, and exhibits high visible light transmittance and solar radiation transmittance. Alternatively, a high transmittance glass sheet is provided that contains not more than 0.06% of total iron oxide and 0.025 to 0.20% of cerium oxide and has a ratio of a fluorescence intensity at 395 nm to a fluorescence intensity at 600 nm of 10% or higher when subjected to ultraviolet irradiation at a wavelength of 335 nm.

Abstract: A glass composition including from 0.10 to 2.0% yttrium oxide (e.g., Y2O3) and employing in its colorant portion iron (total iron expressed as Fe2O3), erbium (e.g., Er2O3), and/or holmium (e.g., Ho2O3). In certain embodiments, the glass may be grey in color.

Abstract: Disclosed are a glass substrate for an information recording medium, having excellent scratch resistance and a light weight and having high fracture toughness, the glass substrate having a fragility index value, measured in water, of 12 &mgr;m−½ or less or having a fragility index value, measured in an atmosphere having a dew point of −5° C. or lower, of 7 &mgr;m−½ or less, or the glass substrate comprising, by mol %, 40 to 75% of SiO2, 2 to 45% of B2O3 and/or Al2O3 and 0 to 40% of R′2O in which R′ is at least one member selected from the group consisting of Li, Na and K), wherein the total content of SiO2, B2O3, Al2O3 and R′2O is at least 90 mol %, and a magnetic information recording medium comprising a magnetic recording layer formed on the glass substrate.

Abstract: A glass composition suitable for manufacturing plasma displays and large-area displays using the fusion draw process is provided. The glass composition includes 59-66 mol % SiO2, 14.5-18.0 mol % Al2O3, 8.5-12.0 mol % Na2O, 2.5-6.5 mol % K2O, 2.5-9.0 mol % CaO, 0.0-3.0 mol % MgO, 0.0-3.0 mol % SrO, 0.0-3.0 mol % BaO, and 0.0-5.0 mol % MgO+SrO+BaO.

Abstract: Low transmittance glass is composed of soda-lime-silica glass including 0.001 to 2 wt. % Li2O and, as colorant, 0.7 to 2.2 wt. % total iron oxide expressed as Fe2O3 (T-Fe2O3). The glass has visible light transmittance (YA) of not greater than 65%, measured by using the CIE illuminant A, total solar radiation transmittance (TG) of not greater than 60%, and ultraviolet transmittance defined by ISO 9050 of not greater than 25%, when the glass has a thickness between 2.1 mm and 6 mm. Ultraviolet/infrared absorbent green glass is composed of soda-lime-silica glass including 0.001 to 2 wt. % Li2O and, as colorant, 0.4 to 2 wt. % total iron oxide expressed as Fe2O3 (T-Fe2O3) wherein FeO expressed as Fe2O3 is 15 to 60% of T-Fe2O3. The glass has visible light transmittance (YA) of not less than 70%, measured by using the CIE illuminant A, and total solar radiation transmittance (TG) of not greater than 60%, when the glass has a thickness between 2.1 mm and 6 mm.

Abstract: The present invention provides a green tinted, ultraviolet absorbing, soda lime silica glass having a luminous transmittance of at least 70 percent and ultraviolet transmittance of no more than 38 percent at thickness ranging from 0.154 to 0.189 inches (3.9 to 4.9 mm). These properties are achieved in the present invention by using a colorant portion that is either (a) greater than 0.6 percent by weight total iron (expressed as Fe2O3) with a redox (FeO/total iron) of from 0.275 to less than 0.35 or (b) from greater than 0.6 to 0.85 percent by weight total iron with a redox of less than 0.35. It is preferred that the glass have a dominant wavelength of 495 to 535 nanometers.

Abstract: An alkali-free glass applicable to a light transparent glass substrate in a liquid crystal display essentially consists, by weight, of basic elements of 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, and 0-10% ZnO, and a fining agent of a combination of 0.05-3% Sb2O3 and at least one of 0.05-2% SnO2 and 0.005-1% Cl2, which fining agent makes the resultant glass free from bubbles without the use of toxic As2O3 which has been known as the fining agent in the art.

Abstract: The present invention provides a light-colored high-transmittance glass sheet including, as coloring components, in weight percent, less than 0.06% total iron oxide in terms of Fe2O3 (T—Fe2O3); 0.5 to 5 ppm CoO; and 0 to 0.45% cerium oxide; wherein the ratio of FeO in terms of Fe2O3 to T—Fe2O3 is less than 40%; and wherein the glass sheet has a dominant wavelength of 470 to 495 nm when measured at a glass sheet thickness of 10 mm. The present invention also provides a light-colored high-transmittance glass sheet of light neutral gray or bronze tint with a dominant wavelength of 560 to 585 nm.

Abstract: An alkali-free glass consisting essentially of: SiO2 64 to 76 mol %,  Al2O3 5 to 14 mol %, B2O3 5 to 16 mol %, MgO 1 to 16.5 mol %, CaO 0 to 14 mol %, SrO 0 to 6 mol %, and BaO 0 to 2 mol %.