Abstract: The present invention provides high temperature sealing glass compositions for use in producing mechanically and chemically durable electrically insulating hermetic glass seals between materials such as zirconia, alumina, fosterite, steatite, carbon steels, stainless steels, and superalloys. High temperature sealing glass compositions according to the present invention include a glass component and optional vehicles. The glass component includes one or more glass frits containing in weight percent from about 17% to about 56% BaO+SrO, from about 18% to about 60% SiO.sub.2, from about 6% to about 36% B.sub.2 O.sub.3, from about 2% to about 32% Al.sub.2 O.sub.3, from about 0% to about 25% CaO plus MgO, from about 0% to about 20% Y.sub.2 O.sub.3, from about 0% to about 7% ZrO.sub.2, from about 0% to about 3% alkali oxides, from about 0% to about 5% Co.sub.3 O.sub.4, from about 0% to about 5% NiO, and from about 0% to about 3% MoO.sub.3.

Abstract: The present invention provides lead and cadmium free glass enamel compositions. In one embodiment of the invention, glass frits include from about 0.1 percent by weight to about 15 percent by weight Nb.sub.2 O.sub.5, less than about 3 percent by weight alkali metal oxides, less than about 3 percent by weight ZnO, less than about 1 percent by weight B.sub.2 O.sub.3, and precursors from which Bi.sub.2 SiO.sub.5 can be crystallized upon firing, said precursors including Bi.sub.2 O.sub.3 and SiO.sub.2. Glass frits according to the present invention preferably further include up to about 25 percent by weight of coloring oxides, such as CeO.sub.2, Co.sub.3 O.sub.4, In.sub.2 O.sub.3, SnO, Cr.sub.2 O.sub.3, CuO, Fe.sub.2 O.sub.3, MnO.sub.2, MoO.sub.3, NiO, and V.sub.2 O.sub.5. By incorporating various amounts of coloring oxides into the compositions, the degree of crystallization and the rate at which crystallization occurs upon firing of the compositions can be controlled.

Abstract: The present invention provides a new and improved coating composition for use in forming a dielectric layer upon a section of metal upon firing. The coating composition includes a glass composition, said glass composition comprising in weight percent a combined weight of BaO and SrO of from about 15% to about 75%, from about 5% to about 35% B.sub.2 O.sub.3, from about 10% to about 40% SiO.sub.2, up to about 10% Al.sub.2 O.sub.3, up to about 7% Co.sub.3 O.sub.4, up to about 20% ZnO, up to about 20% TiO.sub.2, up to about 7% P.sub.2 O.sub.5, up to about 7% CuO, up to about 7% Fe.sub.2 O.sub.3, up to about 7% NiO, a combined weight of SnO, MoO.sub.3, WO.sub.3, Sb.sub.2 O.sub.5, of up to about 20%, up to about 20% Bi.sub.2 O.sub.3, a combined weight of up to about 20% Nb.sub.2 O.sub.5, La.sub.2 O.sub.3, Y.sub.2 O.sub.3 and CeO.sub.2, up to about 5% ZrO.sub.2, up to about 20% CaO, up to about 5% MgO, up to about 2% As.sub.2 O.sub.3 and a combined weight of up to about 3% Li.sub.2 O, Na.sub.2 O and K.sub.2 O.

Abstract: The present invention provides a new and improved thick film paste for use as an acid resistant overglaze. In one preferred embodiment such paste includes a glass composition comprising in weight percent from about 30% to about 60% PbO, from about 5% to about 20% ZnO, from about 2% to about 20% B.sub.2 O.sub.3, from about 4% to about 12% Al.sub.2 O.sub.3, from about 5% to about 18% SiO.sub.2, up to about 8% ZrO.sub.2, up to about 8% TiO.sub.2 and from about 9% to about 21% Nb.sub.2 O.sub.5.

Abstract: This invention relates to a lead-free glass enamel for glass beverage containers and a method of decorating glass beverage containers using such glass enamel. The method includes the steps of:i) providing a glass beverage container;ii) providing a decorative lead-free glass enamel comprising a glass frit, the glass frit comprising in weight percent from 17% to 28% SiO.sub.2, from 12% to 30% B.sub.2 O.sub.3, up to 3% Al.sub.2 O.sub.3, up to 13% Na.sub.2 O, up to 13% K.sub.2 O, up to 14% TiO.sub.2, from 5% to 30% ZnO, up to 14% ZrO.sub.2, up to 6% CeO, up to 6% Y.sub.2 O.sub.3, from 1% to 8% La.sub.2 O.sub.3, up to 1% MgO, up to 5% CaO, up to 10% SrO, up to 16% BaO, from 0.5% to 5% fluoride, a maximum of 5% each of WO.sub.3, P.sub.2 O.sub.5, Bi.sub.2 O.sub.3, Sb.sub.2 O.sub.3 and MoO.sub.3, with the provisions that the sum of the levels of plus Na.sub.2 O plus K.sub.

Abstract: The present invention provides new and improved dielectric materials. In one preferred embodiment such novel dielectric material is formed by firing a composition including a glass composition comprising in weight percent from about 22% to about 45% ZnO, from about 4% to about 22% MgO, from about 1% to about 16% Al.sub.2 O.sub.3, from about 20% to about 49% SiO.sub.2, from about 2% to about 11% BaO, up to about 10% ZrO.sub.2, from about 0.05% to about 1.1% Fe.sub.2 O.sub.3 and from about 0.05% to about 0.95% PbO.

Abstract: The present invention provides a method of adherently depositing a thick film composition on an aluminum nitride substrate comprising the steps of providing an aluminum nitride substrate, providing a thick film composition, and applying the thick film composition on the aluminum nitride substrate. The thick film composition includes a glass frit binder, a conductive metallic material and a lithium-containing adhesion promoting compound.

Abstract: This invention relates to a lead-free glass coating made by firing a lead-free glass composition comprising in weight percent from about 35% to about 77% of bismuth oxide, from about 10% to about 33% of boron oxide, and from about 10% to about 32% of zinc oxide at a temperature sufficient to fuse and cure the glass composition. The invention also relates to lead-free glazes and enamels that exhibit excellent acid resistance, possess low coefficients of linear or thermal expansion, and moderate maturation temperatures.

Abstract: This invention relates to a lead-free glass coating made by firing a lead-free glass enamel composition comprising a glass frit having by weight from about 20% to about 40% zinc oxide, from about 20% to about 32% boron oxide, and from about 10% to about 30% silicon dioxide, from about 0% to about 12% titanium dioxide, from about 4% to about 12% sodium oxide, from about 0% to about 10% potassium oxide, from about 0% to about 12% zirconia, up to about 4% alumina, up to about 5% lithium and up to about 5% fluorine. The lead-free glass coating exhibits excellent adhesion and improved acid resistance.

Abstract: A thick film paste composition adapted to be bonded onto an aluminum nitride substrate is provided which comprises (a) an electrical property regulating component present in an amount sufficient to control the electrical properties of said paste; (b) a lead free or low lead glass composition capable of bonding said electrical property regulating component to the surface of an aluminum nitride substrate.

Abstract: A low dielectric, low temperature fired glass ceramic produced by firing at about 800.degree.-900.degree. C. a mixture comprising at least one glass consisting of, by weight percent, 0 to 50% B.sub.2 O.sub.3, 35 to 65% CaO, and 10 to 65% SiO.sub.2, and selected from the glasses of CaO-B.sub.2 O.sub.3 -SiO.sub.2 glass system. The glass ceramic is light weight, exhibits a dielectric constant of less than about 7.9, has adequate mechanical strength and thermal conductivity, and is compatible with precious metal conductors. The glass ceramic is useful in the manufacture of integrated circuits and any other electronic or mechanical components where a glass ceramic exhibiting this particular combination of characteristics is suitable.

Abstract: This invention relates to a lead-free glass coating made by firing a lead-free glass composition comprising in weight percent from about 35% to about 77% of bismuth oxide, from about 10% to about 33% of boron oxide, and from about 10% to about 32% of zinc oxide at a temperature sufficient to fuse and cure the glass composition. The invention also relates to lead-free glazes and enamels that exhibit excellent acid resistance, possess low coefficients of linear or thermal expansion, and moderate maturation temperatures.

Abstract: A low dielectric, low temperature fired glass ceramic produced by firing at about 800.degree.-950.degree. C. a mixture comprising at least one glass consisting of, by weight percent, 0 to 50% B.sub.2 O.sub.3, 35 to 65% CaO, and 10 to 65% SiO.sub.2 l , and selected from the glasses of CaO-B.sub.2 O.sub.3 -SiO.sub.2 glass system. The glass ceramic is light weight, exhibits a dielectric constant of less than about 5.2, has adequate mechanical strength and thermal conductivity, and is compatible with precious metal conductors. The glass ceramic is useful in the manufacture of integrated circuits and any other electronic or mechanical components where a glass ceramic exhibiting this particular combination of characteristics is suitable.

Abstract: The present invention provides a new and useful composition and method of using the same for producing an enamel finish on a formed section of glass. The composition partially crystallizes upon heating, thereby helping to prevent the forming and handling equipment from sticking and/or adhering to the composition during the forming operation. The composition includes a crystallizable glass frit and seed powder. The crystallized glass frit includes precursors from which Zn.sub.2 SiO.sub.4 can be crystallized upon firing of the composition. The seed powder causes at least a portion of the precursors to crystallize upon firing such that during firing at least a portion of the crystallizable glass frit yields crystallized Zn.sub.2 SiO.sub.4 formed by the precursors. Preferably, the precursors contain 30-75 wt %/5-20 wt % SiO.sub.2, and the seed powder contains crystalline Zn.sub.2 SiO.sub.4.

Abstract: A method of bonding a dielectric material to a substrate comprising the steps of:I. providing a substrate;II. providing a dielectric composition comprising:(a) about 30% to about 100% by weight of a glass composition selected from the group consisting of:(a-1) a mixture of two glass compositions comprising a first glass composition having a glass transition temperature in the range of about 585.degree. C. to about 620.degree. C. and a second glass composition having a glass transition temperature in the range of about 765.degree. C. to about 815.degree. C.; or(a-2) a mixture of three glass compositions comprising a first glass composition having a glass transition temperature in the range of about 585.degree. C. to about 620.degree. C., a second glass composition having a glass transition temperature in the range of about 765.degree. C. to about 815.degree. C., and a third glass composition having a glass transition temperature in the range of about 650.degree. C. to about 720.degree. C.;III.

Abstract: A thick film conductor composition adapted to be bonded to an aluminum nitride substrate is provided which comprises a sufficient amount of conductive metallic material to render the conductor composition electrically conductive when bonded to the substrate, a glass frit binder for the metallic material capable of being bonded to the substrate, and a lithium containing compound capable of reacting with the substrate upon heating so as to aid in adherently bonding the conductor composition to the aluminum nitride substrate. A thick film conductor bonded onto the surface of an aluminum nitride substrate as well as a method of producing the same are also provided.

Abstract: This invention relates to a dielectric composition comprising:(a) about 30% to about 100% by weight of a glass composition selected from the group consisting of:(a-1) a bismuth-free, lead-free or low-lead containing glass composition having a glass transition temperature in the range of about 600.degree. C. to about 800.degree. C.;(a-2) a mixture of two bismuth-free, lead-free or low-lead containing glass compositions comprising a first glass composition having a glass transition temperature in the range of about 585.degree. C. to about 620.degree. C. and a second glass composition having a glass transition temperature in the range of about 765.degree. C. to about 815.degree. C.; or(a-3) a mixture of three bismuth-free, lead-free or low-lead containing glass compositions comprising a first glass composition having a glass transition temperature in the range of about 585.degree. C. to about 620.degree. C., a second glass composition having a glass transition temperature in the range of about 765.degree. C.

Abstract: The present invention relates to an improved U.V. absorbing glass composition comprising from about 75 to about 98 parts by weight of a lead oxide free base glass having dissolved therein from about 2 to about 25 parts by weight of a U.V. additive selected from the group consisting of cerium oxide, manganese oxide, iron oxide, cobalt oxide, copper oxide, vanadium oxide, molybdenum oxide, and mixtures of two or more of said oxides; and to an ink composition comprising from about 15 to about 25% by weight vehicle, from about 8 to about 16% by weight a ceramic pigment, and from about 59 to about 77% by weight of said U.V. absorbing glass composition.

Abstract: A combined friction modifier and reinforcing agent and friction materials containing it are disclosed in which the combined modifier and reinforcing agent comprises a substantially amorphous, unstable, finely divided glass convertible in response to heat generated by the friction material during use to a devitrified, crystallized, friable state which separates from the amorphous, unstable glass in a substantially non-smearing particulate form.

Abstract: Glass compositions are disclosed that are particularly useful in comminuted form as sources of micronutrient elements for soils. The glasses are based on phosphorous as P.sub.2 O.sub.5 and contain a nutrient amount of a micronutrient metal in oxide form, such as zinc, copper, manganese, molybdenum, or boron oxides or mixtures thereof, plus a solubility control agent. The control agent is a metal compound or mixture of metal compounds, usually potassium or sodium oxide or potassium or sodium chloride, and is present in the glass to provide a controlled release of the micronutrient metal, both as to amount and rate.