Abstract: A sealing glass is provided that includes SiO2, Al2O3 having a content of less than 2% by weight, is free of PbO except for unavoidable impurities, a coefficient of linear thermal expansion (?20-300) of more than 10*10?6/K, a dielectric constant (?r) in the range from at least 7.10 to not more than 7.80 at a measurement frequency of 1 MHz and a temperature of 25° C., and a glass transition temperature (Tg) in a range from 400 to 550° C.

Abstract: A glass includes the following components in % by weight: 2-10 wt-% SiO2, 2-10 wt-% B2O3, 40-55 wt-% La2O3, 4-11 wt-% Gd2O3, 6-14 wt-% Nb2O5, 8-18.5 wt-% TiO2, and 5-11 wt-% ZrO2. The glass has a refractive index nd of at least 2.02, a sum of the portions of La2O3, Nb2O5, TiO2 and ZrO2 is at least 76.5% by weight, and a weight ratio of a sum of the portions of La2O3, Nb2O5 and ZrO2 to the portion of TiO2 is at least 3.85:1.

Abstract: A glass having a refractive index at a wavelength of about 587.6 nm of 1.95 to 2.05 and a dispersion of 22 to less than 35 includes the following components in % by weight: 4-12 SiO2; 4-11 B2O3; <10 BaO; 30-<52 La2O3; <14 Gd2O3; <5.5 ZrO2; 10-25 TiO2; 3-16 Nb2O5; and ?2.0 ZnO. A sum total of the proportions by weight of SiO2 and B2O3 is at least 10% by weight.

Abstract: A filter glass contains >1.1 to 6.0 wt % Li2O and at least one further component selected from Na2O and K2O, and includes the following composition (in wt % based on oxide): 55.0-75.0 P2O5, 4.1-8.0 Al2O3, 8.0-18.0 CuO, 0-<0.8 V2O5, ?2.0 SiO2, ?2.0 F, 0-11.0 Total R?O (R?=Mg, Ca, Sr, Ba, Zn), and 3.0-17.0 Total R2O (R=Li, Na, K).

Abstract: A glass includes: a plurality of components (in wt.-%) as follows: Component Proportion (% by weight) SiO2 50-80? Al2O3 0-10 B2O3 0-15 Li2O 0-20 Na2O 0-20 K2O 0-25 BaO 0-10 CaO 0-10 MgO 0-10 ZnO 0-10 La2O3 0-20 TiO2 0-5? Cl 0-3? MnO2 0.2-5.0? Cr2O3 0.05-3.0,? a sum of a plurality of proportions of Li2O, Na2O and K2O being in a range of from 5.0 to 30.0 wt.-%, a sum of a plurality of amounts of MnO2 and Cr2O3 being at least 0.3 wt.-%, and a ratio of a plurality of proportions of MnO2 (in wt.-%) and Cr2O3 (in wt.-%) being in a range of from 1.5:1 to 12.5:1.

Abstract: A pore-free ceramic is provided that has a high modulus of elasticity and a low coefficient of thermal expansion. A process for producing a corresponding ceramic is also provided. The pore free ceramic is a dimensionally stable substrate material in applications subjected to temperature gradients including semiconductor manufacture.

Abstract: A glass includes the following components in % by weight: 2-10 wt-% SiO2, 2-10 wt-% B2O3, 40-55 wt-% La2O3, 4-11 wt-% Gd2O3, 6-14 wt-% Nb2O5, 8-18.5 wt-% TiO2, and 5-11 wt-% ZrO2. The glass has a refractive index nd of at least 2.02, a sum of the portions of La2O3, Nb2O5, TiO2 and ZrO2 is at least 76.5% by weight, and a weight ratio of a sum of the portions of La2O3, Nb2O5 and ZrO2 to the portion of TiO2 is at least 3.85:1.

Abstract: A glass has a low ratio of density ? and refractive index nd. The glass has a refractive index nd in a range of 1.80 to 2.00, an internal transmission of at least 80% (450 nm, 10 mm), a dispersion vd of 19.0 to 27.0, and a ratio ?/nd of <1.97.

Abstract: A sealing glass is provided that includes SiO2, Al2O3 having a content of less than 2% by weight, is free of PbO except for unavoidable impurities, a coefficient of linear thermal expansion (?20-300 of more than 10*10?6/K, a dielectric constant (?r) in the range from at least 7.10 to not more than 7.80 at a measurement frequency of 1 MHz and a temperature of 25° C., and a glass transition temperature (Tg) in a range from 400 to 550° C.

Abstract: A glass includes cations of the following components in the indicated amounts (molar proportion in cat.-%): 30-80 cat.-% silicon; 0-20 cat.-% boron; 0-2 cat.-% aluminum; 5-35 cat.-% sodium; 2-25 cat.-% potassium; 0-0.5 cat.-% nickel; 0-0.5 cat.-% chromium; and 0.03-0.5 cat.-% cobalt. A sum of the molar proportions of cations of sodium and potassium is in a range of from 15 to 50 cat.-%, a sum of the molar proportions of cations of nickel and chromium is in a range of from 0.1 to 0.5 cat.-%, and a ratio of the sum of the molar proportions of cations of sodium and potassium to the sum of the molar proportions of cations of nickel and chromium is in a range of from 70:1 to 200:1.

Abstract: Glass sheets with high refractive indexes (nd), layer composite assemblies including the glass sheets, methods for manufacturing the glass sheets, and methods of using the glass sheets are all provided. The glass sheets can be processed in a glass sheet manufacturing process and nevertheless have the optical properties of a classical optical glass. The glass sheets of the are highly transparent, resistant to crystallization, chemically resistant and highly refractive. The glass sheets have a viscosity-temperature behavior that is adapted to the manufacturing procedure with glass sheet manufacturing processes.

Abstract: Glass sheets with high refractive indexes (nd), layer composite assemblies including the glass sheets, methods for manufacturing the glass sheets, and methods of using the glass sheets are all provided. The glass sheets can be processed in a glass sheet manufacturing process and nevertheless have the optical properties of a classical optical glass. The glass sheets of the are highly transparent, resistant to crystallization, chemically resistant and highly refractive. The glass sheets have a viscosity-temperature behavior that is adapted to the manufacturing procedure with glass sheet manufacturing processes.

Abstract: A pore-free ceramic is provided that has a high modulus of elasticity and a low coefficient of thermal expansion. A process for producing a corresponding ceramic is also provided. The pore free ceramic is a dimensionally stable substrate material in applications subjected to temperature gradients including semiconductor manufacture.

Abstract: Transparent layer composite assemblies are provided that are suitable for use in solar modules and light emitting diodes, as well as methods for producing such layer composite assemblies and to the uses thereof. The layer composite assemblies have substrate materials that make it possible to increase the luminous efficiency of light emitting diodes and the efficiency of solar modules.

Abstract: The invention relates to lead-free optical glasses having a refractive index nd of from 1.52 to 1.58, an Abbe number vd of from 50 to 57 and a negative partial dispersion &Dgr;Pg,F of <−0.0090, having a composition (in % by weight, based on oxide) of SiO2>15-25; B2O3 45-55; Al2O3 8-13; CaO 2-8; ZnO 0-5; with CaO+ZnO 2-10; Li2O 0-4; Na2O 0-4; K2O 0-4; with Li2O+Na2O+K2O 3-8; La2O3 0-14; Nb2O5 0-4.8; Ta2O5>10-17; with Ta2O5+Nb2O5>10-17; SnO2 0-2; ZrO2 0-7; with Ta2O5+ZrO2>10-<18.

Abstract: The invention relates to a barium-free, X-ray-opaque dental glass, to a dental glass/polymer composite comprising the glass, and to the use thereof as dental filling, where the dental glass has the following composition (in % by weight): SiO2 20-45, Al2O3 5-35, B2O3 1-10, Na2O 1-10, K2O 0-8, Cs2O 0-8, sum all alkali metal oxides 1-15, CaO 0-8, SrO 0-27, ZnO 2-20, ZrO2 2-10, P2O5 0-10, La2O3 0-10, F 2-20, the total content of B2O3, ZnO, ZrO2 and La2O3 is >20% by weight, and the refractive index nd of the dental glass is in the range from 1.47 to 1.70.