Abstract: This invention relates to glasses especially suitable for use as substrates in plasma display panels, the glasses being essentially free from alkali metal oxides and consisting essentially, in weight percent, of______________________________________ SiO.sub.2 39-43 CaO 0-2.5 Al.sub.2 O.sub.3 2.5-9.5 SrO 10.5-21.5 B.sub.2 O.sub.3 1.5-4.5 BaO 25.5-39 MgO 0-1.5 MgO + CaO + SrO +BaO 45.5-52.5 Fining Agents 0-1.5.

Abstract: A UV-absorbing, polarizing glass article and method of making, the glass having an R.sub.2 O-B.sub.2 O.sub.3 -SiO.sub.2 base glass composition, a sharp spectral cut-off at about 400 nm, a precipitated crystal phase consisting of a halide selected from the group composed of cuprous, cadmium and mixed cuprous-cadmium halides, the crystallites in the crystal phase being elongated, and a portion of the crystallites near the surface of the article being at least partially reduced to colloidal copper, whereby the article exhibits permanent dichroic behavior.

Abstract: This invention is related to glasses for use as substrates in flat panel display devices; more specifically, for use as substrates in LCDs which utilize polycrystalline silicon thin film transistors. The compositions for the inventive glasses are essentially free from alkali metal oxides and consist essentially, in mole percent, of______________________________________ SiO.sub.2 64-70 Y.sub.2 O.sub.3 0-5 Al.sub.2 O.sub.3 9.5-14 MgO 0-5 B.sub.2 O.sub.3 5-10 CaO 3-13 TiO.sub.2 0-5 SrO 0-5.5 Ta.sub.2 O.sub.5 0-5 BaO 2-7 Nb.sub.2 O.sub.5 0-5 MgO + CaO + SrO + BaO 10-20.

Abstract: This invention is directed to glass compositions particularly designed for use as substrates in flat panel display devices and, more expressly, for use as substrates in LCDs which employ polycrystalline silicon thin film transistors. The glass compositions are essentially free from alkali metal oxides and consist essentially, in mole percent, of______________________________________ SiO.sub.2 65-76 MgO 0-5 ZrO.sub.2 0-2.5 Al.sub.2 O.sub.3 7-11 CaO 0-10 TiO.sub.2 0-3 BaO 12-19 SrO 0-10 Ta.sub.2 O.sub.5 0-3 B.sub.2 O.sub.3 0-5 MgO + 0-15 ZrO.sub.2 + 0.5-5. CaO + TiO.sub.2 + SrO Ta.sub.2 O.sub.

Abstract: This invention is directed to the production of transparent glasses which can be chemically strengthened within a period of time not exceeding four hours to develop a surface compression layer having a sufficient depth to survive the Drop Ball Test after abrasion, the glasses consisting essentially, in weight percent, of______________________________________ SiO.sub.2 55-65 CaO 0-1.5 B.sub.2 O.sub.3 5-20 MgO 0-4 Al.sub.2 O.sub.3 4-10 TiO.sub.2 0-4 B.sub.2 O.sub.3 + Al.sub.2 O.sub.3 14-26 ZrO.sub.2 0-7 Li.sub.2 O 0-3 MgO + TiO.sub.2 + ZrO.sub.2 0-10 Na.sub.2 O 6-18 As.sub.2 O.sub.3 0-0.5 K.sub.2 O 2-10 ZnO 0-1.5 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 13-22. ______________________________________Where desired, 3.5-5.5% Fe.sub.2 O.sub.3 may be included to yield glasses which, at a thickness of 2 mm, will not transmit more than 1% of ultraviolet radiation at a wavelength of 380 nm. Where an ultraviolet absorbing glass exhibiting a neutral gray, fixed tint is desired, 0.02-0.035% Co.sub.3 O.sub.4 and 0.08-0.

Abstract: This invention is directed to a glass containing elongated silver halide crystals selected from the group consisting of AgCl, AgBr, AgI, and mixtures thereof which is capable of polarizing radiation in the visible portion of the radiation spectrum and which does not exhibit photochromism when exposed to radiation in the ultraviolet/visible portions of the radiation spectrum, wherein the composition of the glass is essentially free of copper and includes an amount of CeO.sub.2 effective to retain the silver in the glass composition in the oxidized state.

Abstract: This invention is directed to glasses exhibiting annealing points above 625.degree. C., strain points above 600.degree. C., linear coefficients of thermal expansion (25.degree.-300.degree. C.) below 90.times.10.sup.-7 /.degree. C., refractive indices below 1.8, and, in thicknesses of 2 mm, infrared transmissions of at least 50% to wavelengths longer than 6 .mu.m, consisting essentially expressed in terms of cation % on the oxide basis, of 5-40% KO.sub.0.5, 4-22% LaO.sub.1.5, 50-76% GaO.sub.1.5, and up to 15% total of at least one additional component in the indicated properties selected from the group consisting of______________________________________ BaO 0-5 NaO.sub.0.5 0-5 CaO 0-5 PbO 0-5 CsO.sub.0.5 0-10 ZnO 0-5 ReO.sub.1.5 0-5 Cl 0-5.

Abstract: This invention is drawn to heavy metal oxide glasses exhibiting high nonlinear susceptibility and infrared transmission consisting essentially, in weight percent, of 42-48% PbO, 33-44% Bi.sub.2 O.sub.3, 10-15% Ga.sub.2 O.sub.3, and up to 15% total of at least one member of the group consisting of up to 5% SiO.sub.2 and/or GeO.sub.2 and up to 15% Tl.sub.2 O. This invention also comprehends the fabrication of light guiding fibers from those glasses.

Abstract: The invention is concerned with glasses for use as substrates in flat panel display devices which use polycrystalline silicon thin film transistors. The compositions for these glasses are essentially free from alkali metal oxides and MgO and consist essentially, in mole percent, of:______________________________________ SiO.sub.2 65-75 CaO and/or BaO 0-10 Al.sub.2 O.sub.3 6-10 B.sub.2 O.sub.3 0-5 SrO 15-26 [CaO and/or BaO] + B.sub.2 O.sub.

Abstract: This invention relates to the preparation of thermally stable, chemically durable, heavy metal oxide glasses exhibiting good transmission of infrared radiation to wavelengths of about 7 microns consisting essentially, in weight percent, of 7.5-25% Ga.sub.2 O.sub.3, 70-92% Bi.sub.2 O.sub.3, and 0.25-12% R.sub.2 O, wherein R.sub.2 O consists of at least one alkali metal oxide selected from the group consisting of Na.sub.2 O and K.sub.2 O.

Abstract: This invention is drawn to heavy metal oxide glasses exhibiting high nonlinear susceptibility and infrared transmission consisting essentially, in weight percent, of 42-48% PbO, 33-44% Bi.sub.2 O.sub.3, 10-15% Ga.sub.2 O.sub.3, and up to 15% total of at least one member of the group consisting of up to 5% SiO.sub.2 and/or GeO.sub.2 and up to 15% Tl.sub.2 O. This invention also comprehends the fabrication of light guiding fibers from those glasses.