Abstract: The invention provides a process for preparing a porous glass, comprising mixing borosilicate glass powder with calcium carbonate particles to form a mixture, sintering the mixture at a temperature in the range from 750 to 850° C. to obtain a sintered body, cooling the sintered body and leaching calcium carbonate from the cooled sintered body with the aid of an acid. The invention also provides a process for the preparation of one or more alkaline earth metal silicates by reacting a vitreous material and an alkaline earth carbonate, optionally in the presence of a transition metal or post-transition metal oxide, at a temperature lower than 1200° C., to form a composite consisting of one or more alkaline earth metal silicates and a residual glass, and optionally recovering the one or more silicates.

Abstract: The invention relates to a composition for producing a solar absorber coating, comprising a silicone resin formulated with: (i) at least one compound selected from the group consisting of black ruthenium oxides and black spinel; and (ii) a glass powder. A method of applying the composition and coatings formed are also provided.

Abstract: The present invention discloses coating compositions comprising: I) at least one highly absorbing material selected from the group consisting of ruthenium, iridium and osmium compounds, and mixtures thereof; II) an inorganic glass binder or a precursor thereof; III) a ceramic filler comprising metal oxides, metal powders and mixtures thereof; and V) a liquid organic vehicle. The invention further discloses methods for preparing these coatings and uses thereof in solar applications.

Abstract: Disclosed are zinc niobium phosphate glasses consisting essentially, expressed in terms of mole percent on the oxide basis of, 40-65% P2O5, 25-37% ZnO, 0.1-15% Nb2O5, 0-6% Al2O3, 0-5% Bi2O3, 0-3% Na2O and 0-5% B2O3, said glass exhibiting glass transition temperature below 450° C., a dilatometer softening point below 500° C., coefficient of expansion in the range of 80-120×10?7° C.?1, good chemical durability and blue color. The glass of the present invention is useful for sealing optical fiber to ferrule by local heating.

Abstract: Disclosed are zinc niobium phosphate glasses consisting essentially, expressed in terms of mole percent on the oxide basis of, 40-65% P2O5, 25-37% ZnO, 0.1-15% Nb2O5, 0-6% Al2O3, 0-5% Bi2O3, 0-3% Na2O and 0-5% B2O3, said glass exhibiting glass transition temperature below 450° C., a dilatometer softening point below 500° C., coefficient of expansion in the range of 80-120×10?7° C.?1, good chemical durability and blue color. The glass of the present invention is useful for sealing optical fiber to ferrule by local heating.

Abstract: Film compositions are described which can be used as conductive, resistive or insulating films in a wide variety of electronic and light electrical components. Said films comprise a conductive phase based on pyrochlore-related compounds, and a dielectric phase based on glass.

Abstract: Film compositions are described which can be used as conductive, resistive or insulating films in a wide variety of electronic and light electrical components. Said films comprise a conductive phase based on pyrochlore-related compounds, and a dielectric phase based on glass.

Abstract: A glass composition comprising, in mole percent of the total composition: glass-forming compounds in a total amount of 75 to 85%, wherein said glass forming compounds comprise 40 to 65% SiO2, 10 to 20% Bi2O3 and 0.1 to 3% Al2O3, and glass modifiers in a total amount of 15 to 25%, wherein said glass modifiers comprise 1 to 23 % ZnO, 0.1 to 5% CuO, 0.1 to 5 CaO and 0.1 to 2% MgO, thick film formulations containing said composition and uses thereof.

Abstract: Composition of matter of cobalt ruthenate compounds and glass, wherein said compounds have the formula Co.sub.3-x Ru.sub.x-y M.sub.y O.sub.4 wherein: M is a metal selected from among Mn, Fe, Cu, Zn and Al; and x and y are numbers in the range between 0 and 2, inclusive, and thick film paste compositions comprising said compounds are provided. Novel cobalt ruthenate compounds, process for preparing such compounds and uses thereof are also provided.

Abstract: A product and process are disclosed that relate to electroconductive powders based on tantalum, niobium, or phosphorus or any combination thereof doped tin oxide and coatings containing such powders. These powders can be used for making transparent coated films that are conductive and have desirable properties for a number of end uses. Some important end uses are in static dissipative fiber and films, coatings for recyclable containers, materials involved in packaging, where the presence of certain heavy metals is undesirable, transparent conductive coatings, among other uses.

Abstract: A product and process are disclosed that relate to electroconductive powders based on tantalum, niobium, or phosphorus or any combination thereof doped tin oxide and coatings containing such powders. These powders can be used for making transparent coated films that are conductive and have desirable properties for a number of end uses. Some important end uses are in static dissipative fiber and films, coatings for recyclable containers, materials involved in packaging, where the presence of certain heavy metals is undesirable, transparent conductive coatings, among other uses.

Abstract: A product and process are disclosed that relate to electroconductive powders based on tantalum niobium, or phosphorus or any combination thereof doped tin oxide and coatings containing such powders. These powders can be used for making transparent coated films that are conductive and have desirable properties for a number of end uses. Some important end uses are in static dissipative fiber and films, coatings for recyclable containers, materials involved in packaging, where the presence of certain heavy metals is undesirable, transparent conductive coatings, among other uses.

Abstract: The invention is directed to a lead-free and cadmium-free thick film paste composition suitable for forming resistor or thermistor patterns on a substrate.

Abstract: The invention is directed to a thick film paste composition comprising electrically conductive particles and finely divided particles of a glass composition comprising by mole % 5-70% Bi.sub.2 O.sub.3, 18-35% SiO.sub.2, 0.1-40% CuO, 0.5-25% ZnO, 0.5-40% CoO, 0.5-40% Fe.sub.2 O.sub.3, and 0.5-40% MnO, which the glass composition is free of lead and cadmium, all dispersed in an organic medium.

Abstract: A crystallizable glass composition comprising PbO and/or Bi.sub.2 O.sub.3, ZnO, B.sub.2 O.sub.3, Cr.sub.2 O.sub.3, SnO.sub.2 and optionally SiO.sub.2 and/or Al.sub.2 O.sub.3, having an optical density parameter .gtoreq.1.6.

Abstract: Thick film thermistor paste comprising an admixture of finely divided particles consisting essentially of a) a conductive phase consisting of (1) at least one oxide of a platinum group metal having a positive TCR, and (2) Co.sub.2 RuO.sub.4, b) an inorganic binder having a Dilatometer softening point of 450.degree.-750.degree. C. which contains transition metal oxides and is free of alkali metal oxides, c) a filler selected from vitreous silica, zircon and mixtures thereof, all of (a) through (c) being dispersed in, d) an organic medium.

Abstract: A crystallizable glass composition comprising ZnO, PbO, B.sub.2 O.sub.3, SiO.sub.2, SnO.sub.2 and optionally Al.sub.2 O.sub.3 and/or Cr.sub.2 O.sub.3.

Abstract: The invention is directed to a thick film thermistor composition consisting of finely divided particles of (a) a ruthenium-based pyrochlore, and (b) a short borosilicate glass or glass mixture, both dispersed in (c) an organic medium.

Abstract: The invention is directed to a thick film thermistor composition consisting of finely divided particles of (a) a ruthenium-based pyrochlore, and (b) a short borosilicate glass or glass mixture, both dispersed in (c) an organic medium.

Abstract: The invention is directed primarily to a method of doping tin oxide with Ta.sub.2 O.sub.5 and/or Nb.sub.2 O.sub.5 using pyrochlore-related compounds derived from the system SnO--SnO.sub.2 --Ta.sub.2 O.sub.5 --Nb.sub.2 O.sub.5 for use in thick film resistor compositions. The invention is also directed to thick film resistors containing the above-described pyrochlore-related compounds and to various compositions and methods for making such thick film resistors.