Abstract: A method is provided for adjusting, e.g., lowering, the melting and/or forming and/or liquidus temperatures of a glass composition which can be accomplished without substantially changing the bending and annealing temperatures of the glass composition. The method includes decreasing the amount of MgO in the glass composition and increasing the amount of two or more or all of CaO, R2O (Na2O and K2O), Al2O3 and SiO2 by the same or about the same amount.

Abstract: A host material for Tm3+-doping is provided. The host material is a fluorophosphate glass having a non-zero concentration of Tm3+, cation elements that include at least an alkaline earth, phosphorus, and aluminum, and anion elements that include oxygen (O) and fluorine (F). The fluorine(F)/oxygen (O) ratio (F/(F+O)) for the fluorophosphate glass of the embodiments of the present invention can be in the range of about 0.5 to about 0.85. The fluorophosphate glass further can have an alkali metal concentration of 10 mole % or less to improve durability. The Tm-doped fluorophosphate glass can be incorporated into an amplifier or laser utilized in the 14xx nm wavelength region.

Abstract: A pressable glass ceramic which contains lithium silicate glass and leucite is disclosed. Also, disclosed is the combination of leucite and a lithium silicate glass to stably increase the coefficients of thermal expansion of the resulting glass composition, and the preparation of leucite suitable for addition to the glass composition. Also disclosed are methods for fabricating glass ceramic and dental products from the pressable glass ceramic.

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: Disclosed is a zinc phosphate glass consisting essentially, expressed in terms of mole percent on the oxide basis, of 31-34% P2O5, 0-2% Al2O3, 5-11% Li2O, 5-13% Na2O, 3-7% K2O, with Li2O+Na2O+K2O being 10-28%, 20-45% ZnO, 0-10% CaO, 0-10% BaO, 0-10% SrO, with CaO+BaO+SrO being 3-12%, and 0-2% SiO2, said glass exhibiting a stable glass transition temperature below 450° C., a working temperature below 500° C., and a water durability of no more than 5×10−7 g/cm2/min after immersion in water at 95° C. for 24 hours. The low-temperature glass of the present invention is particularly useful for producing glass/polymer blends. Glass/polymer blends containing the glass of the present invention are also disclosed.

Abstract: Provided are glass compositions uniquely applicable for the preparation of ultrafine fibers for filtration and separation applications. The glasses meet all physical and chemical criteria, including that for biodissolution rate.

Abstract: An optical glass that substantially does not contain any Ta2O5 and has high-refractivity low-dispersion optical properties and various optical parts made of such optical glass are provided stably at a low cost, and an optical part made thereof is provided, the optical glass having a glass composition comprising, by weight %, 0 to 7% of SiO2, 18 to 30% of B2O3, provided that the total content of SiO2 and B2O3 is 23 to 35%, 2 to 10% of ZnO, 30 to 50% of La2O3, 0 to 20% of Gd2O3, 0 to 20% of Y2O3, provided that the total content of La2O3, Gd2O3 and Y2O3 is 45 to 60%, 3 to 8% of ZrO2 and 3 to 12% of Nb2O5, the total content of these components being at least 95% by weight, the optical glass having a refractive index [nd] and an Abbe's number [&ngr;d] which satisfy specified relational expressions.

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: A sealing material for electric parts containing a lead-free tin silicate-phosphate glass of 50-100 volume percents and refractory fillers of the balance. The lead free tin silicate-phosphate glass consists essentially of, by molecular percent, 30-80% SnO, 5.5-20% SiO2, and 10-50% P2O5. The glass may contain at least one of glass stabilizing elements, said glass stabilizing elements including 3-25% ZnO, 0-4.9% B2O3, 0-5% Al2O3, 0-10% WO3, 0-10% MoO3, 0-10% Nb2O5, 0-10% TiO2, 0-10% ZrO2, 0-15% R2O (R is Li, Na, K, and/or Cs), 0-5% CuO, 0-5% MnO, 0-10% R′O (R′ is Mg, Ca, Sr and/or Ba), a total content of at least one of the glass stabilizing elements being up to 40%.

Abstract: A lead-free glow in the dark glaze is provided for ceramic bisques. It includes Frit, Lithium Carbonate, Borax, carboxmethylceullulose and a phosphorus pigment. In some applications, Bentonite and/or Magnesium Sulfate are used. Preservatives and deflocculants may be needed in some applications.