Abstract: An optically detectable, floatable arsenic- and antimony-free, glazable lithium-aluminosilicate glass that can be prestressed and the glass ceramic converted therefrom are described. The glass or the glass ceramic has a composition (in % by weight based on oxide) of essentially SiO2 55-69, Al2O3 19-25, Li2O 3.2-5, Na2O 0-1.5, K2O 0-1.5, MgO 0-2.2, CaO 0-2.0, SrO 0-2.0, BaO 0-2.5, ZnO 0-<1.5, TiO2 1-3, ZrO2 1-2.5, 0.1-<1, ?TiO2+ZrO2+SnO2 2.5-5, P2O5 O-3, Nd2O3 0.01-0.6, CoO 0-0.005, F 0-1, B2O3 0-2.

Abstract: Solid oxide fuel cell stack obtainable by a process comprising the use of a glass sealant with composition 50-70 wt % SiO2, 0-20 wt % Al2O3, 10-50 wt % CaO, 0-10 wt % MgO, 0-2 wt % (Na2O+K2O), 5-10 wt % B2O3, and 0-5 wt % of functional elements selected from TiO2, ZrO2, F, P2O5, MoO3, Fe2O3, MnO2, La—Sr—Mn—O perovskite (LSM) and combinations thereof.

Abstract: To Provide a polarizing glass with better weatherability than conventional polarizing glasses, affording high long-term reliability without the above-described surface deterioration. To provide an optical isolator employing polarizing glass of improved weatherability, affording good weatherability and high reliability for extended periods. [Means for Solving] A polarizing glass comprising geometrically anisotropic particles dispersed in an oriented manner in at least one surface layer of a glass base body. The glass base body does not comprise an oxide of alkali earth metal and PbO, and consists of borosilicate glass comprising at least one additive component selected from the group consisting of Y2O3, ZrO2, La2O3, CeO2, Ce2O3, TiO2, V2O5, Ta2O5, WO3, and Nb2O5, and the geometrically anisotropic metal particles are metallic cupper particles. An optical isolator employing the polarizing glass.

Abstract: Pressable glass-ceramic compositions for dental purposes of the composition I, II or III I II III (percent by weight) (percent by weight) (percent by weight) ZrO2 17-70%? ZrO2/ 15-70%? Al2O3 15-70% Al2O3 SiO2 17-59%? SiO2 17-59%? SiO2 17-59% Al2O3 ?2-15% ZrO2 32-15%? ZrO2 2-15% Y2O3 ??0-6% Y2O3 ??0-6% Y2O3 0-6% K2O 3-12.5%? K2O 3-12.5%? K2O 3-12.5% Na2O 0.2-8.5%?? Na2O 0.2-8.5%?? Na2O 0.2-8.5% Li2O 0-1.5% Li2O 0-1.5% Li2O 0-1.5% CaO 0.3-2% CaO 0.3-2% CaO 0.3-2% B2O3 0.1-5% B2O3 0.1-5% B2O3 0.1-5% F 0-2.5% F 0-2.5% F 0-2.5% CeO2 0.2-2% CeO2 0.2-2% CeO2 0.2-2% TiO2 0-1.5% TiO2 0-1.5% TiO2 0-1.5% are particularly suitable for the manufacturing of ceramic veneer frames.

Abstract: The present invention provides processes to immobilize radioactive and/or hazardous waste in a borosilicate glass, the waste containing one or more of radionuclides, hazardous elements, hazardous compounds, and/or other compounds. The invention also provides borosilicate glass compositions for use in immobilizing radioactive and/or hazardous waste.

Abstract: Provided are glass compositions with higher softening point temperatures than conventional glasses, which improve flame penetration test performance of flexible duct insulation. In particular, the glass compositions have a softening point in the range of about 1230-1276° F., a log-3 viscosity temperature in the range of about 1802-1879° F., and a temperature difference between log-3 viscosity and liquidus temperatures of at least 150° F. These glasses are specially formulated to increase softening point while only minimally increasing log-3 viscosity temperature, so as to allow fiber insulation manufacturing without requiring increased energy use.

Abstract: A glass composition of the present invention includes the following components, in terms of mass % and mass ppm: 60 to 79% SiO2; 0 to 13% B2O3 (exclusive of 13%); 0 to 10% Al2O3; 0 to 10% Li2O; more than 0% but not more than 20% Na2O; 0 to 15% K2O; 0 to 10% MgO; 0 to 15% CaO; 0 to 15% SrO; 0 to 15% BaO; 0 to 10% ZnO; 0 to 15% Nb2O5; 0 to 20% Ta2O5; more than 0.02% but not more than 10% TiO2; and 0.5 to 50 ppm T-Fe2O3 (where T-Fe2O3 denotes a total iron oxide obtained by converting all of iron compounds into Fe2O3).

Abstract: An ultraviolet ray transmitting glass composition including the following components, in terms of mass % or mass ppm: 60 to 79% SiO2; 0 to 1% B2O3; exceeded 0% but not more than 20% Al2O3; 0 to 10% Li2O; 5 to 20% Na2O; 0 to 15% K2O; 0 to 10% MgO; 0 to 10% CaO; 0 to 15% SrO; 0 to 2% refining agent; 2 to 20 ppm T-Fe2O3 (in which T-Fe2O3 denotes a total iron oxide content obtained by converting all of iron compounds into Fe2O3); and 0 to 200 ppm TiO2. The ultraviolet ray transmitting glass composition is suitable for a glass article, such as a bioanalytical device that is used for analysis using ultraviolet rays.

Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Abstract: Pressable glass-ceramic compositions for dental purposes of the composition I, II or III I II III ZrO2 17-70%? ZrO2/Al2O3 15-70%? Al2O3 ??15-70% SiO2 17-59%? SiO2 17-59%? SiO2 ??17-59% Al2O3 ?2-15% ZrO2 ?2-15% ZrO2 ???2-15% Y2O3 ??0-6% Y2O3 ??0-6% Y2O3 ???0-6% K2O 3-12.5%? K2O 3-12.5%? K2O ?3-12.5% Na2O 0.2-8.5%?? Na2O 0.2-8.5%?? Na2O 0.2-8.5% Li2O 0-1.5% Li2O 0-1.5% Li2O ???0-1.5% CaO 0.3-2% CaO 0.3-2% CaO ???0.3-2% B2O3 0.1-5% B2O3 0.1-5% B2O3 ???0.1-5% F 0-2.5% F 0-2.5% F ???0-2.5% CeO2 0.2-2% CeO2 0.2-2% CeO2 ???0.2-2% TiO2 0-1.5% TiO2 0-1.5% TiO2 ???0-1.5% are particularly suitable for the manufacturing of ceramic veneer frames.

Abstract: Glass compositions are provided that are useful in electronic applications, e.g., as reinforcements in printed circuit board substrates. Reduced dielectric constants are provided relative to E-glass, and fiber forming properties are provided that are more commercially practical than D-glass.

Abstract: An optical glass for the manufacture of large transmission optics, such as lenses having a thickness of 100 millimeters or more, comprises 35 to 70 wt.-% SiO2, 17 to 35 wt.-% Al2O3, 3 to 17 wt.-% P2O5, 0 to 6 wt.-% Li2O, 0.5 to 4 wt.-% MgO, 0.5 to 3 wt.-% ZnO, a maximum of 1 wt.-% CaO, a maximum of 0.5 wt. % BaO, 0.5 to 6 wt.-% TiO2, 0.5 to 3 wt.-% ZrO2, 0 to 1 wt.-% Na2O, 0 to 1 wt.-% K2O, a maximum of 1 wt.-% of refining agents (As2O3, SP2O3) and a maximum of 500 ppm of other contaminants. The glass composition may be equal to the composition of the glass ceramic Zerodur® and allows to manufacture large transmission optics in a cost-effective way, has a maximum of transmittance which is in the range of a He—Ne lasers and has a CTE of about 3·10?6/K.

Abstract: Decorative paints are typically burned in at relatively high temperatures, preferably in connection with the thermal ceramicizing process. In order to provide a glass ceramic panel having a cooking surface with a pleasing deep black, very smooth decoration by a burned-in decorative paint, the glass ceramic panel is formed from a melt that is black and the decorative paint on the black glass ceramic panel contains a colorless glass flux and from 0 to 10 percent by weight of at least one black pigment. The decorative paint can consist of the colorless melted-on glass flux. The glass flux preferably has a composition in percent by weight of Li2O, 0-5; Na2O, 0-5; K2O, <2; ?Li2O+Na2O+K2O, 1-10; MgO, 0-3; CaO, 0-4; SrO, 0-4; BaO, 0-4; ZnO, 0-4; B2O3, 15-27; Al2O3, 10-20; SiO2, 43-58; TiO2, 0-3; ZrO2, Sb2O3, 0-2; F, 0-3.

Abstract: The invention relates to an opaque dental ceramic for burning on a rack or implant of dental restoration at least comprising SiO2, Al2O3, B2O3, Na2O, K2O as well as TiO2. To cover the non-dental-coloured implant material sufficiently the invention provides that the opaque dental ceramic is clouded by precipitation of one or more crystalline TiO2 phases.

Abstract: The present invention relates to a boroaluminosilicate glass which exhibits excellent UV transmission. In particular, the present invention is directed at an alkali fluorine-doped boroaluminosilicate glass comprising, in mole percent on the oxide basis, of 30-80% SiO2, 1-20% Al2(O, F2)3, 5-35% B2O3, 5-20% R2O, where R is Li, Na, K, Rb or Cs, and an amount of up to 12% of F. The glass possesses an R/Al molar ratio of between 0.4 to 3 and an F/O molar ratio of no greater than 0.35. The alkali fluorine-doped boroaluminosilicate glass of the present invention exhibits a UV transmission at 300 nm, of greater than 80%/mm.

Abstract: A glass composition of the present invention relates to a multicomponent oxide glass composition manufactured by melting glass raw materials, which contains: 10 ppm or more of at least one type of a polyvalent element; minimum valence cations of the polyvalent element in a ratio of the minimum valence cation content to the total polyvalent element content of 5 to 98% in mass ratio; and 0.01 to 2 ?l/g (0° C., 1 atm) of helium.

Abstract: A pressable dental ceramic comprising a mixture of glass and glass-ceramic frits. A refractory filler is also combined with the frits. The dental ceramic contains an amount of leucite less than about 35 percent by weight. Other additives may be included such as pigments, opacifying agents and fluorescing agents. The dental ceramic comprises a cellular-like microstructure comprised of glassy regions surrounded by clusters of leucite crystals distributed around those glassy regions forming a cellular three-dimensional network.

Abstract: The invention relates to a photostructurable body, in particular glass or glass-ceramic, in which the glass is a multicomponent glass and/or the glass-ceramic is a multicomponent glass-ceramic, in each case having a positive change in refractive index ?n as a result of the action of light.

Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.

Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43 W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.

Abstract: The invention relates to an antimicrobial, anti-inflammatory and disinfecting glass, whereby the glass comprises: 30–95 wt. % SiO2,0–40 wt. % Na 2O, 0–40 wt. % K2O, 0–40 wt. % Li2O, 0–35 wt. % CaO, 0–10 wt. % MgO, 0–10 wt. % Al2O3, 0–15 wt. % P2O5 wt. % B2O3?, 0–10 wt. % NaF, 0–10 wt. % LiF, 0–10 wt. % KF, 0–10 wt. % CaF2, 0–5 wt. % Ag2O, 0–10 wt. % MgF2,0–2 wt. % Fe2O3and 0–10 wt. % XJy, where X?Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Ag or Zn and y=1 or y=2 and the sum of XJy> is 10 ppm.

Abstract: Disclosed are glass compositions and glass fibers formed from certain embodiments of the disclosed glass compositions. Certain embodiments of the glass compositions include, among other components, bismuth oxide. Certain embodiments of the glass composition include about 0.5–30% bismuth oxide of the composition by weight and silica oxide at about 54–70% of the composition by weight. Embodiments of the glass compositions may also include other components. For example, zinc oxide can make up about 0.01–5% of the composition by weight.

Abstract: An alkali-free aluminoborosilicate glass having a coefficient of thermal expansion ?20/300 of between 2.8×10?6/K and 3.8×10?6/K, which has the following composition (in % by weight, based on oxide): silicon dioxide (SiO2)>58–65, boric oxide (B2O3)>6–11.5, magnesium oxide (MgO) 4–8, barium oxide (BaO) 0–<0.5, zinc oxide (ZnO) 0–2 and aluminum oxide (Al2O3)>14–25, calcium oxide (CaO) 0–8, strontium oxide (SrO) 2.6–<4, with barium oxide (BaO)+strontium oxide (SrO)>3, or aluminum oxide (Al2O3)>14–25, calcium oxide (CaO) 0–<2, strontium oxide (SrO)>0.5–<4, or aluminum oxide (Al2O3)>21–25, calcium oxide (CaO) 0–8, strontium oxide (SrO)>2.6–<8, with barium oxide (BaO)+strontium oxide (SrO)>3, and which is highly suitable for use as a substrate glass both in display technology and in thin-film photovoltaics.

Abstract: The invention encompasses a glass-ceramic comprising a continuous glass phase and a crystal phase comprising tetragonal leucite, wherein the glass-ceramic has a crack-free glass phase and a crystal phase comprising leucite crystals distributed essentially homogeneously in the glass phase. The crystal phase has a particle size distribution made of from about 5% to about 70% of a first group of leucite crystals having particle sizes of <1 ?m and from about 30% to about 95% of a second group of leucite crystals having particle sizes of ?1 ?m. The proportion of Li2O in the glass-ceramic is preferably below 0.5% by weight. It is preferred that not only the glass phase but also the crystal phase is essentially free of cracks. The corresponding glass-ceramics are particularly suitable for use in the dental sector, in particular as facing ceramics.

Abstract: The present invention provides processes to immobilize radioactive and/or hazardous waste in a borosilicate glass, the waste containing one or more of radionuclides, hazardous elements, hazardous compounds, and/or other compounds. The invention also provides borosilicate glass compositions for use in immobilizing radioactive and/or hazardous waste.

Abstract: An alkaline-earth aluminosilicate glass having a composition (in % by weight, based on oxide) of SiO2>55-64; Al2O3 13-18; B2O3 0-5.5; M5O 0-7; CaO 5.5-14; SrO 0-8; BaO 6-17; ZrO2 0-2; CeO2 0-0.3; TiO2 0-0.5; CoO 0.01-0.035; Fe2O3 0.005-0.05; and NiO 0-0.

Abstract: A method of producing a single-phase composition Mn+1AzXn, primarily the production of the single-phase material Ti3SiC2, where n lies within a range of 0.8-3.2, where z lies within a range of 0.8-1.2, where M is at least one metal taken from the group of metals Ti (titanium), Sc (scandium), V (vanadium), Cr (chromium), Zr (zirconium), Nb (niobium) and Ta (tantalum), where X is at least one of the non-metals C (carbon) and N nitrogen), and where A is at least one of the chemical elements Si (silicon), Al (aluminum) and Sn (tin) or a compound of those elements, such that the final, desired compound will include the components Mn+1AzXn. A powder mixture of the components is formed and is ignited under an inert atmosphere to prevent promotion of dissociation and to cause the components to react.

Abstract: A birefringent glass composed of a phase-separated glass is provided. The phase-separated glass includes a borosilicate glass in which fluorine and a constituent that tends to crystallize into a high refractive index phase as a consequence of phase separation are included. In one embodiment, the constituent comprises TiO2.

Abstract: The present invention relates to preferably lead-free and arsenic-free optical glasses, having a refractive index of 1.48?nd?1.56, an Abbe number of 64??d?72, a low transformation temperature (Tg?500° C.) and good ion exchange properties, as well as good chemical resistance and crystallization stability, and comprising the following composition (in % by weight): SiO2 53-58 B2O3 11-15 Al2O3 16-20 Na2O ?0-13 K2O ?0-13 ?M2O ?9-13 F 0.5-4?? The glass may additionally contain standard refining agents. The invention also relates to the use of the optical glasses according to the invention in the application areas of imaging, projection, telecommunications, optical communication technology and/or laser technology.

Abstract: An optical glass having a positive anomalous dispersion comprises, in mass %, SiO2 40-60% B2O3 3-9% TiO2 ?3-15% Nb2O5 0.1-5.0% Al2O3 ?3-15% WO3 0.5-5.0% MgO 0-3% CaO 0-3% SrO 0-3% BaO 0-3% K2O exceeding 10% and up to 21% Na2O ?0-10% Sb2O3 0-1% and a fluoride or fluorides of a metal element or elements ??3-10%, contained in the above metal oxides, a total amount of F contained in the fluoride or fluorides is free of PbO and As2O3 except for unavoidable mixing of these compounds as impurities, has optical constants of a refractive index (nd) within the range from 1.48 to less than 1.55 and an Abbe number (?d) within the range from 45 to 55, and has an anomalous dispersion (??g,F) of +0.0010 or over.

Abstract: The invention relates to a silica yarn and to woven or nonwoven fabrics produced from said yarn, which comprises 30 to 1500 ppm by weight of aluminum and 10 to 200 ppm by weight of titanium in oxidized form, the sum of the mass of the chemical elements different from Si and O being less than 5000 ppm by weight, the following elements being absent or present in a very small quantity: boron, sodium, calcium, potassium and lithium. The fabrics comprising this silica yarn have an excellent high-temperature withstand and thus retain their flexibility for a long time at above 600° C. They are useful especially in uses requiring good high-temperature flexibility, such as for furnace seals.

Abstract: Low-boron, high-barium glass compositions and fine-diameter glass fibers for forming clean room HEPA and ULPA filters, are provided. The compositions and resulting glass fibers preferably comprise a low concentration, less than about 1 weight percent, of boric oxide, a relatively high concentration of barium, such as from about 5.5 to about 18 weight percent barium oxide, and a concentration of alkali oxide ranging from about 10 to about 14.5 weight percent. Alumina is preferably present in the glass fiber compositions and the resulting glass fibers in a range of from about 4 weight percent to about 8 weight percent, and calcium oxide and magnesium oxide are preferably present in a range of from about 1 weight percent to about 6 weight percent and from about 0 weight percent to about 3.5 weight percent, respectively. The glass fiber compositions also preferably include from about 2 to about 6 weight percent zinc oxide, from about 0.1 to about 1.

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 optical colored glass with a composition (in percent by weight based on oxide) of SiO2 30-75; K2O 5-35; TiO2 0-5; B2O3>4-17; ZnO 5-37; F 0.01-10 MIMIIIY2II 0.1-3, whereby MI=Cu+, Ag+, MIII=In3+, Ga3+, Al3+, YII=S2−, Se2−, Te2−, as well as the use of this glass as a long-pass cutoff filter.

Abstract: The present invention relates generally to UV (ultraviolet) photosensitive bulk glass, and particularly to batch meltable alkali boro-alumino-silicate glasses. The photosensitive bulk glass of the invention exhibits photosensitivity to UV wavelengths below 250 nm. The photosensitivity of the alkali boro-alumino-silicate bulk glass to UV wavelengths below 250 nm provide for the making of refractive index patterns in the glass. With a radiation source below 250 nm, such as a laser, refractive index patterns are formed in the glass. The inventive photosensitive optical refractive index pattern forming bulk glass allows for the formation of patterns in glass and devices which utilize such patterned glass.

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 glass for covering electrodes, which consists, as represented by mass percentage based on the following oxides, essentially of: Mass percentage PbO 44 to 68% Bi2O3 0 to 18%, B2O3 19 to 23%, SiO2 1.2 to 5%, Al2O3 2 to 6%, ZnO 4 to 9%, CuO 0.1 to 0.5%, In2O3 1.1 to 2%, SnO2 0 to 1%, and CeO2 0 to 1%.

Abstract: The invention concerns alkali-poor or alkali-free alkaline earth aluminum borosilicate glasses having the following composition (weight percent based on oxides) SiO2>55-70; B2O3 1-8; Al2O3 10-18; Na2O>1-5; K2O 0-4; with Na2O+K2O >1-5; MgO 0-5; CaO 3-<8; SrO 0.1-8; BaO 4.5-12; with MgO+CaO+SrO+BaO 10-25; SnO2 0-15; ZrO2 0-3; TiO2 0-2; ZnO 0-2. Said glasses can be used especially as substrates in thin layer photovoltaics, especially for CIS-based solar cells.

Abstract: According to one aspect of the present invention an optically active glass contains Sb2O3, up to about 4 mole % of an oxide of a rare earth element, and 0-20 mole % of a metal halide selected from the group consisting of a metal fluoride, a metal bromide, a metal chloride, and mixtures thereof, wherein this metal is a trivalent metal, a divalent metal, a monovalent metal, and mixtures thereof. In addition, any of the glass compositions described herein may contain up to 15 mole % B2O3 substituted for an equivalent amount of Sb2O3.

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: The invention provides a dental porcelain product, comprising a core layer of core material and a repair layer of repair material. The core layer has a higher melting temperature than the repair layer. The core material comprising a portion of crystalline core material and a portion of glass core material. The repair material comprises a portion of crystalline repair material and a portion of glass repair material. The portion of crystalline core material is greater than the portion of the crystalline repair material. The core material and the repair material each are formed from powder materials and each comprising silicon dioxide, aluminum oxide, sodium oxide, potassium oxide, calcium oxide, cerium oxide and boron trioxide. Preferably, the core material comprises a component selected from the group consisting of barium oxide and titanium oxide. Preferably, the repair material comprises a component selected from a group consisting of lithium oxide, magnesium oxide and terbium oxide.

Abstract: The present invention relates to an oxyhalide glass matrix including 0-70 mol. % SiO2, 5-35 mol. % Al2O3, 1-50 mol. % B2O3, 5-35 mol. % R2O, 0-12 wt. % F, 0-12 wt. % Cl, and 0 to 0.2 mol. % rare earth element, wherein R is Li, Na, K, Rb, or Cs. The present invention further relates to a method of producing the glass matrix and to a method of modifying the spectral properties of an oxyhalide glass.

Abstract: The present invention is directed at a leaded copper boroaluminosilicate glass, having coefficients of thermal expansion (CTES) of between 25-55×10−7/°C. (over a range of 25-300° C.) and a softening point in the range of 550-725° C., being suitable for use as a sealing glass, especially for borosilicate glasses, and having a composition consisting essentially, in terms of weight percent on an oxide basis, of 27-60 SiO2, 3-14 Al2O3, 9-28 B2O3, 0.0-10 R2O, 0.1-40 PbO, 0.1-11 CuO, where R2O is an alkali oxide selected from the group consisting of Li2O, Na2O, K2O, Rb2O and Cs2O.

Abstract: The object of the present invention is colorless inorganic glasses, as well as products manufactured from said glasses. Said glasses are of the type containing copper halides or copper cadmium halides and having a sharp optical absorption cutoff between 370 nm and 425 nm essentially having the composition below, expressed in cationic percentages: 23-73% SiO2 15-45% B2O3  0-24% Al2O3  0-12% Li2O  0-20% Na2O  0-12% K2O 0-5% CaO + BaO + SrO 0.125-1%    Cu2O 0-1% CdO 0-5% ZrO2 with   0-1.75% Cl 0.

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: Lead- and barium-free crystal glass for the manual or machine production of high-grade glass objects with a refractive index higher than 1.52 and a density of at least 2.45 g/cc, wherein the crystal glass comprises the following components in weight percent. SiO2 59.0-71.0 TiO2 0.001-8.0  Al2O3 0.01-4.0  CaO  2.0-10.0 MgO 0.5-8.0 ZnO 0.01-11.0 K2O 0.08-11.0 Na2O  3.0-15.5 Sb2O3 or AS2O3 0.001-1.5  SrO 0.001-0.1  B2O3 0.01-3.0  Li2O 0.01-2.0  SO42− 0.0008-1.2   F− 0.008-0.2  as well as at least two components selected from the group consisting of Er2O3, Nd2O3, CeO2, CoO, Pr2O3, SeO, NiO and MnO and has a moisture content of 0.025 to 0.07% by weight.

Abstract: A method for processing a glass fiber material, wherein the glass fiber material has been heat treated at a temperature less than or equal to the annealing temperature of the glass for a length of time effective to prevent separation and fraying of the edges of the material upon cutting.

Abstract: The present invention provides a new and improved lead-free and cadmium-free glass enamel composition that displays good flow at traditional glass enamel firing temperatures and upon firing produces an enamel finish that displays no cracking, good chemical resistance, good weatherability, and improved color values. The glass enamel composition of the present invention includes a glass component, an oxidizer, a pigment system, and optional vehicles and fillers. The presence of the oxidizer in the composition, which can be included as part of the glass component, as a separately added material, or both, improves the color values of the fired enamel as compared to enamels formed using similar glass enamel compositions having no oxidizer present.

Abstract: A low-dielectric-constant glass fiber having a glass composition comprising, by % by weight, 45 to 60% of SiO2, 8 to 20% of Al2O3, 15 to 30% of B2O3, 0 to 5% of MgO, 5%, exclusive of 5%, to 12% of CaO, 0 to 1.0% of Li2O+Na2O+K2O, 0.5 to 5% of TiO2 and 0 to 2% of F2 is suitable for use for reinforcing a high-density printed wiring board required to have a low dielectric tangent and its peripheral members.