Abstract: A dielectric ceramic composition is disclosed which consists essentially of: a main ceramic composition containing barium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by xBaO.multidot.yTiO.sub.2 .multidot.z[(1-a)RE.sub.2 O.sub.3 .multidot.aBi.sub.2 O.sub.3 ] where RE represents at least one rare earth metal, 0.10.ltoreq.x.ltoreq.0.20, 0.60.ltoreq.y.ltoreq.0.75, 0.10 .ltoreq.z.ltoreq.0.25, x+y+z=1 and 0<a.ltoreq.0.3; and a glass composition composed of ZnO, B.sub.2 O.sub.3 and SiO.sub.2, which is represented by k(wt. %)ZnO.multidot.m(wt. %)B.sub.2 O.sub.3 .multidot.n(wt. %)SiO.sub.2 where 30 .ltoreq.k.ltoreq.85, 5.ltoreq.m.ltoreq.50, 2.ltoreq.n.ltoreq.40, k+m+n=100. The glass composition is contained in an amount of at least 0.1 part by weight, but not more than (18-62.5a) parts by weight (where 0<a.ltoreq.0.2) or not more than 5.5 parts by weight (where 0.2<a<0.3), per 100 parts by weight of the main ceramic composition.

Abstract: The present invention is directed to the preparation of two groups of transparent glass-ceramics exhibiting high optical clarity and containing essentially only one crystal phase. The first group consists essentially, in cation percent, of______________________________________ SiO.sub.2 20-35 PbF.sub.2 19-23 AlO.sub.1.5 10-20 YF.sub.3 3-7, CdF.sub.2 19-34 ______________________________________and the second group consists essentially, in cation percent, of ______________________________________ SiO.sub.2 20-35 PbF.sub.2 15-25 AlO.sub.1.5 10-20 YF.sub.3 3-7 CdF.sub.2 21-31 ZnF.sub.2 3-7.

Abstract: An optical glass including as its main ingredients in weight percent 25-50% SiO.sub.2, 16-40% B.sub.2 O.sub.3, 5-25% SrO and 1-10% Li.sub.2 O has optical constants of refractive index (Nd) of 1.55-1.65 and Abbe number (.nu.d) of 55-63 and a yield point (At) below 600.degree. C. which is suited for mold pressing.

Abstract: A novel heat-generating composition comprises an electrically conductive powder, and a crystallizable glass frit which is alkaline-earth borate glass essentially containing at least one component of rare-earth metal oxides and Bi.sub.2 O.sub.3. A novel heat-generating composition comprises a molybdenum silicide as an electrically conductive powder, a glass frit, and an additive which is metal oxide powder and/or metal powder. A novel heat-generating composition comprises a combination of a molybdenum silicide and a nickel silicide as electrically conductive powder, a glass frit, and a nickel powder as an additive. The heat-generating composition is sintered in a nitrogen atmosphere or in air, to produce a heater, which has a low electrical-resistance value and a good heat-resistance.

Abstract: A screen-printable thick film paste composition suitable for forming conductive patterns on a rigid substrate comprising:(a) finely divided particles of a lead-free glass composition having a softening point log (eta)=7.6 poise from 400.degree. C.-650.degree. C., a log (eta.) specific viscosity in a range from 2 at 500.degree. C. to 5 at 700.degree. C. and consisting essentially of, by weight 65-95% Bi.sub.2 O.sub.3, 2-15% SiO.sub.2, 0.1-9% B.sub.2 O.sub.3, 0-5% Al.sub.2 O.sub.3, 0-5% CaO, and 0-20% ZnO; and(b) electrically conductive particles; andall of (a) and (b) being dispersed in (c) an organic medium.

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: Rare earth ions with partially filled 4f electron shells are incorporated in an amount of up to 39 mole percent oxide into a glass consisting essentially of, in mole percent, 19-31% SiO.sub.2, 19-31% B.sub.2 O.sub.3, 10-20% Al.sub.2 O.sub.3, 2-10% amounts of SiO.sub.2 and B.sub.2 O.sub.3 should be greater than about 40%, and the amounts of Al.sub.2 O.sub.3, ZrO.sub.2 and Y.sub.2 O.sub.3 are greater than about 12%. The glass can also include about 0.1 to 5% mole percent of FeO, ZnO or both. Suitable rare earth ions include but are not limited to, Er.sup.3+, Nd.sup.3+, Dy.sup.3+, and Sm.sup.3+. Optionally, the glass can be color corrected to neutral for a wide range of illuminant sources by the addition of one or more of the following: Cr.sub.2 O.sub.3, Pr.sub.2 O.sub.3, Fe.sub.2 O.sub.3, CuO, NiO, V.sub.2 O.sub.5, Co.sub.3 O.sub.4 or Ti.sub.2 O.sub.3. These glass compositions are useful as absorption filters. In one embodiment, the composition selectively absorbs at 1064 and 532 nm.

Abstract: A conductive paste contains at least a conductive powder and a glass frit. The glass frit includes 9.0 to 45.0 wt % of SiO.sub.2 and 1.0 to 18.5 wt % of CaO, the balance being ZnO, B.sub.2 O.sub.3 and Li.sub.2 O. The glass frit may contain not more than 6.0 wt % of Al.sub.2 O.sub.3 incorporated therein as additive.

Abstract: A dielectric ceramic composition is disclosed which consists essentially of: a main ceramic composition containing barium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by xBaO.yTiO.sub.2.z[(1-a)RE.sub.2 O.sub.3.aBi.sub.2 O.sub.3 ] where RE represents at least one rare earth metal, 0.10.ltoreq.x.ltoreq.0.20, 0.60.ltoreq.y.ltoreq.0.75, 0.10 .ltoreq.z.ltoreq.0.25, x+y+z=1 and 0<a .ltoreq.0.3; and a glass composition composed of ZnO, B.sub.2 O.sub.3 and SiO.sub.2, which is represented by k(wt. %)ZnO.m(wt. %)B.sub.2 O.sub.3 .n(wt. %)SiO2 where 30 .ltoreq.k.ltoreq.85, 5.ltoreq.m.ltoreq.50, 2.ltoreq.n.ltoreq.40, k+m+n=100. The glass composition is contained in an amount of at least 0.1 part by weight, but not more than (18-62.5a) parts by weight (where 0<a.ltoreq.0.2) or not more than 5.5 parts by weight (where 0.2<a.ltoreq.0.3), per 100 parts by weight of the main ceramic composition.

Abstract: Glass frits are disclosed which are essentially free of lead and contain 0.05 to 15 mol-% sulfur and/or sulfides, preferably zinc sulfide. A process is disclosed for producing a glass frit by melting a mixture of oxides and/or non-oxide compounds (fluorides, carbonates) at temperatures of 1,000.degree. to 1,300.degree. C., followed by sudden cooling, characterized in that the glass frit contains between 0.05 and 15 mol-% sulfur, zinc sulfide or other sulfides. The glass frits can be used in enamel barrier layers for stopping the migration of silver.

Abstract: Zinc-containing, lead- and cadmium-free glass frits with a softening point of less than 510.degree. C. are disclosed. Obligatory components of the glass-frit composition are 31-50 mole % ZnO, 10-44 mole % SiO.sub.2, 11-35 mole % B.sub.2 O.sub.3 and 11-25 mole % Na.sub.2 O. The glass frits can be used as base frit for the production of decorative coating masses which can be stoved below 630.degree. C., preferably masses for the decorating of glass.

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: An optical glass which is a SiO.sub.2 --B.sub.2 O.sub.3 --(TiO.sub.2 +ZrO.sub.2)--SrO--BaO--R'.sub.2 O system of a specific composition range exhibits optical constants of a refractive index (Nd) of 1.57-1.75 and Abbe number (.nu.d) of 30-55, is free of PbO and has improved stability against devitrification and tinting and improved chemical durability.

Abstract: This invention relates to glasses exhibiting refractive indices higher than 1.880, Abbe numbers of at least 29, densities lower than 4.1, good chemical durability and stability against devitrification, and an integrated transmission over the range of 380-800 nm at a thickness of 10 mm greater than 79%, the glasses consisting essentially, expressed in terms of weight percent on the oxide basis, of______________________________________ SiO.sub.2 5-8 B.sub.2 O.sub.3 15-21 ZrO.sub.2 3-10 TiO.sub.2 7-17 Nb.sub.2 O.sub.5 20.5-26 ZrO.sub.2 + TiO.sub.2 + Nb.sub.2 O.sub.5 29-45 La.sub.2 O.sub.3 19-32 Y.sub.2 O.sub.3 0-9 CaO 8-16 SrO 0-5 BaO 0-5 MgO 0-5 CaO + SrO + BaO + MgO 8-16 ZnO 0-5 Li.sub.2 O 0-2 Na.sub.2 O 0-2 K.sub.2 O 0-2 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 0-2.

Abstract: A dielectric ceramic composition is disclosed which consists essentially of: a main ceramic composition containing barium oxide, titanium oxide, rare earth oxide and bismuth oxide as major components, which composition is represented by xBaO.multidot.yTiO.sub.2 .multidot.Z[(1-a)RE.sub.2 O.sub.3 .multidot.aBi.sub.2 O.sub.3 ] where RE represents at least one rare earth metal, 0.10.ltoreq.x.ltoreq.0.20, 0.60.ltoreq.y.ltoreq.0.75, 0.10 .ltoreq.z.ltoreq.0.25, x+y+z=1 and 0<a.ltoreq.0.3; and a glass composition composed of ZnO, B.sub.2 O.sub.3 and SiO.sub.2, which is represented by k(wt.%)ZnO.multidot.m(wt.%)B.sub.2 O.sub.3 .multidot.n(wt.%)SiO.sub.2 where 30 .ltoreq.k.ltoreq.85, 5.ltoreq.m.ltoreq.50, 2.ltoreq.n.ltoreq.40, k+m+n=100. The glass composition is contained in an amount of at least 0.1 part by weight, but not more than (18-62.5a) parts by weight (where 0<a.ltoreq.0.2) or not more than 5.5 parts by weight (where 0.2<a.ltoreq.0.3), per 100 parts by weight of the main ceramic composition.

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 non-reducible dielectric ceramic composition comprises of a basic composition expressed by the general formula:{(Ba.sub.1-x-y Sr.sub.x Ca.sub.y)O}.sub.m (Ti.sub.1-o-p Zr.sub.o Nb.sub.p)O.sub.2+p/2wherein 0.05.ltoreq.x 0.30, 0.005.ltoreq.y.ltoreq.0.12, 0.ltoreq.o.ltoreq.0.20, 0.0005.ltoreq.p.ltoreq.0.012, and 1.002.ltoreq.m.ltoreq.1.03, or{(Ba.sub.1-x-y-z Sr.sub.x Ca.sub.y Mg.sub.z)O}.sub.m (Ti.sub.1-o-p Zr.sub.o Nb.sub.p)O.sub.2+p/2wherein 0.05.ltoreq.x.ltoreq.0.35, 0.005.ltoreq.y 0.12, 0.0005 .ltoreq.z.ltoreq.0.05, 0<o.ltoreq.0.20, 0.0005.ltoreq.p.ltoreq.0.02, 1.000.ltoreq.m.ltoreq.1.04. The composition contains an additive (A) composed of one or more oxides selected from the group of MnO.sub.2, Fe.sub.2 O.sub.3, Cr.sub.2 O.sub.3, CoO and NiO in an amount of 0.02 to 2.0 moles per 100 moles of the basic composition. The composition further contains an additive (B) consisting of SiO.sub.2 and/or ZnO in an amount of 0.1 to 2.

Abstract: A magnetic head comprising magnetic core halves which are sealed with a sealing glass which consists essentially of 1 to 75 wt. % of TeO.sub.2, 1 to 30 wt. % of B.sub.2 O.sub.3, 1 to 75 wt. % of PbO, 1 to 25 wt. % of CdO, 0 to 15 wt. % of ZnO, 0 to 25 wt. % of Bi.sub.2 O.sub.3, 0 to 5 wt. % of A.sub.2 O wherein A is an alkali metal, 0 to 35 wt. % of ARO wherein AR is an alkaline earth metal, 0 to 35 wt. % of La.sub.2 O.sub.3, 0 to 5 wt. % of at least one oxide selected from the group consisting of Al.sub.2 O.sub.3, SiO.sub.2, TiO.sub.2 and ZrO.sub.2, 0 to 10 wt. % of at least one oxide selected from the group consisting of Ta.sub.2 O.sub.5, Nb.sub.2 O.sub.5, WO.sub.3 and MoO.sub.3, 0 to 30 wt. % of PbF.sub.2, and 0 to 2 wt. % of CoO, has a coefficient of thermal expansion of from 82.times.10.sup.-7 /.degree.C. to 137.times.10.sup.-7 /.degree.C. in a temperature range between 30.degree. C. and 300.degree. C., a working temperature of from 430.degree. to 620.degree. C.

Abstract: Glaze composition for use on bone china and fine china which is essentially free from lead and cadium comprises, by weight, SiO.sub.2 :35 to 60%, Bi.sub.2 O.sub.3 :5 to 45%, Al.sub.2 O.sub.3 :5 to 20%, B.sub.2 O.sub.3 :1 to 15%, at least one of CaO, MgO, SrO or BaO:2 to 20%, at least one of Li.sub.2 O, Na.sub.2 O, K.sub.2 O:1 to 10%, and certain other optional ingredients, with the proviso that BaO is not contained in an amount of more than 2% by weight.

Abstract: An oxidation-resistant carbon-containing refractory shape having on the surface thereof exposed to oxidation an oxidation-resistant glaze coating, said glaze coating consisting essentially of the reaction product of a zinc borosilicate frit and a clay; and the method of forming said coating on a refractory shape comprising applying to at least a portion of the shape an aqueous suspension of a fluxed mix consisting essentially of a zinc borosilicate and a clay, drying said coating, and firing said coated refractory shape at a temperature and for a time sufficient to cause the borosilicate and clay in said mix to react and form a substantially uniform glaze coating.

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: This invention is particularly directed to the production of glass-ceramics specifically designed for bonding hard refractory particulate ceramics into dense, mechanically strong composite bodies. The inventive glass-ceramics are crystallized in situ from divalent metal borate glasses. The invention is particularly drawn to composite articles where Al.sub.2 O.sub.3 particles comprise the hard refractory ceramic and the inventive glasses react therewith to form an exceptionally strong bond therebetween accompanied with the development of divalent metal aluminoborate crystals.

Abstract: Lead-zinc-borosilicate glass is provided having a boundary wetting angle with respect to ZnO of at most 40.degree., a processing temperature of at most 540.degree. C., a composition, consisting essentially of, in percent by weight on oxide basis, of______________________________________ 4.0-7.0 SiO.sub.2 13.0-17.0 B.sub.2 O.sub.3 43.0-50.0 PbO 24.0-29.0 ZnO 4.0-7.0 CuO 1.5-2.5 Al.sub.2 O.sub.3 ______________________________________and optionally 0-3 SnO.sub.2, Bi.sub.2 O.sub.3 or MoO.sub.3, as well as 0-1 Cr.sub.2 O.sub.3. The glass is particularly suitable for sealing electronic components, especially varistors made of zinc oxide, as well as a sintering aid for zinc oxide ceramics, especially in the production of varistors from zinc oxide.

Abstract: A powdery coating glass material essentially consists of V.sub.2 O.sub.5 5-35 wt. %, ZnO 33-60 wt. %, B.sub.2 O.sub.3 3-25 wt. %, SiO.sub.2 1-15 wt. %, Al.sub.2 O.sub.3 0-5 wt. %, and at least one element 2-20 wt. % selected from the group consisting of MgO, CaO, SrO, and BaO, which coating glass material has a softening point of 600.degree. C. or less. A coating glass composition is prepared by the above powdery coating glass material or a coating glass paste for use in a thick-film technique which contains the above powdery coating glass material. The prepared coating glass composition has a thermal expansion coefficient ranging from 55.times.10.sup.-7 /.degree.C. to 75.times.10.sup.-7 /.degree.C.

Abstract: A strengthened high lanthanide-containing glass has the composition of, in mole percent______________________________________ SiO.sub.2 54-75 B.sub.2 O.sub.3 5-17 Li.sub.2 O 0-4 Na.sub.2 O 3-18 K.sub.2 O 0-4 Al.sub.2 O.sub.3 0-7 PbO 0-4 MgO 0-3 CaO 0-3 SrO 0-3 BaO 0-3 ZnO 0.1-10 TiO.sub.2 0-5 Ln.sub.2 O.sub.3 3-7 V.sub.2 O.sub.5 + Cr.sub.2 O.sub.3 + Mn.sub.2 O.sub.3 0-5 Fe.sub.2 O.sub.3 + CoO + NiO + CuO As.sub.2 O.sub.3 /Sb.sub.2 O.sub.3 0-0.4 ______________________________________wherein Ln is La, Ce, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and/or Yb.

Abstract: The present invention contemplates a novel enamel composition, a novel electrodeposition bath, a novel metal substrate for enameling, and the novel PEMS produced from these materials and procedures. In general, the novel glass composition of the present invention are within the following composition ranges (which are set forth in percent by weight).______________________________________ SiO.sub.2 9-16% B.sub.2 O.sub.3 20-25% MoO.sub.3 2-10% MgO 30-40% BaO 16-22% ZnO 5-14% SnO.sub.2 0-4% ______________________________________In the novel application method of the present invention, an improved electrophoretic bath has been found in which the glass particles are suspended in a mixture of isopropyl alcohol and either dichloromethane or trichlorotrifluoroethane together with ethylene glycol and an acrylic additive. Stainless steel electroplated with a thin film of molybdenum and heat-treated at an elevated temperature is employed as the substrate.

Abstract: An insulating powder for the formation of a resistant coating is disclosed which comprises a glass powder consisting of 60 to 70% by weight of ZnO, 19 to 25% by weight of B.sub.2 O.sub.3, and 10 to 16% by weight of SiO.sub.2. A composition for the formation of a resistant coating is also disclosed which comprises the powdered oxide of a platinum-family element; the powder of at least one oxide selected from the group consisting of indium oxides, tin oxides, and cadmium oxides; a glass powder capable of forming a crystalline phase on being fired; a ceramic powder; and an organic vehicle.

Abstract: The optical glass of the present invention comprising SiO.sub.2, alkali metal oxides, P.sub.2 O.sub.5 and Nb.sub.2 O.sub.5 has optical properties of 1.70 or more in refractive index nd and 30 or less in Abbe's number .nu.d and is superior in devitrification resistance and stability.

Abstract: This invention relates to photochromic glasses exhibiting refractive indices greater than 1.59, densities no higher than 3.1 g/cm.sup.3, Abbe numbers of at least 40, weight losses no greater than 0.01 mg/cm.sup.2 in the A.O. test, and which, when exposed to actinic radiation at room temperatures, darken to transmittances below 40% and fade at least 15 percentage points of transmittance after five minutes' removal from the actinic radiation.

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 thick film glass ceramic dielectric compositions in which the dielectric is a mixture of amorphous aluminoborosilicate glass, which upon firing forms a single phase of ceramic crystals in a matrix of amorphous remainder glass, and a ceramic additive to minimize substrate bowing.

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: Improved copper conductor inks useful in the fabrication of multilevel circuits are disclosed. The inks comprise copper powder, a devitrifying glass frit selected from a zinc-calcium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-silicate glass frit and mixtures thereof, an adhesion promoting oxide, and a suitable organic vehicle. These inks are particularly adapted for applications where superior adhesion between the copper conductor ink and the underlying substrate or dielectric film is required.

Abstract: A lead-free frit suitable for use on aluminum, consisting essentially of:______________________________________ 33-42 wt. % SiO.sub.2 8-13 TiO.sub.2 0.5-2.5 SnO.sub.2 0.5-2.5 BaO 2.5-5.0 in the absence of Ce.sub.2 O.sub.3 ; 0-4.5 if Ce.sub.2 O.sub.3 is present. SrO 2.2-4.3 ZnO 13-26 Na.sub.2 O 4-9 K.sub.2 O 0.7-6.0 Li.sub.2 O 0.5-4.5 B.sub.2 O.sub.3 1.0-3.5 Sb.sub.2 O.sub.3 0-0.8 Ce.sub.2 O.sub.3 0.5-5.0 P.sub.2 O.sub.5 0.2-1.3 MoO.sub.3 ______________________________________The frit has a fusion temperature below about 1050.degree. F. and displays good qualities of gloss, acid resistance, and adhesion.

Abstract: Improved copper conductor inks useful in fabricating multilevel circuits are provided. The inks comprise copper powder, a devitrifying glass frit which does not begin to flow until the furnace temperature is above about 700.degree. C., and a suitable organic vehicle. Devitrifying glass frits with these properties include a zinc-calcium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-zirconium-phosphosilicate glass frit and mixtures thereof. The inks are advantageous in that they form copper conductor layers having excellent properties without the inclusion of traditional flux materials such as bismuth oxide.

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: The invention is directed to thick film crossover dielectric compositions in which the dielectric is an amorphous aluminoborosilicate glass which upon firing forms a single phase of celsian in a matrix of amorphous remainder glass.

Abstract: A silicophosphate laser glass having a composition comprising, in % by mole,45 to 70% P.sub.2 O.sub.5 ;5 to 20% SiO.sub.2 ;60 to 95% P.sub.2 O.sub.5 +SiO.sub.2 +Al.sub.2 O.sub.5 ;10%<Al.sub.2 O.sub.3 .ltoreq.20%;20%<(Al.sub.2 O.sub.3 +SiO.sub.2).ltoreq.30%;4 to 30% Li.sub.2 O+Na.sub.2 O+K.sub.2 O;0.01 to 12% Nd.sub.2 O.sub.3 ;0 to 5% La.sub.2 O.sub.3 +Y.sub.2 O.sub.3 +B.sub.2 O.sub.5 ;0 to 10% R'O; and0 to 1% Nb.sub.2 O.sub.5 +CeO.sub.2,wherein R' is Mg, Ca, Sr, Ba, Zn or Pb. The silicophosphate laser glass can construct an excellent laser glass as an amplifying medium.

Abstract: Improved copper conductor inks useful in the fabrication of multilevel circuits are disclosed. The inks comprise copper powder, a devitrifying glass frit selected from a zinc-calcium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-silicate glass frit and mixtures thereof, an adhesion promoting oxide, and a suitable organic vehicle. These inks are particularly adapted for applications where superior adhesion between the copper conductor ink and underlying substrate or dielectric film is required.

Abstract: A nitrogen fireable resistor composition comprising:a. a conductive phase containing (1) a perovskite of the form A'.sub.1-x A".sub.x B'.sub.1-y B".sub.y O.sub.3, wherein when A' is Sr; A" is one or more of Ba, La, Y, Ca and Na, and when A' is Ba, A" is one or more of Sr, La, Y, Ca and Na, B' is Ru and B" is one or more of Ti, Cd, Zr, V and Co, O<x<0.2; 0<y<0.2, (2) 5 to 30 weight % of a metallic copper powder, nickel metallic powder or cupric oxide, relative to the total conductive phase weight, andb. a glass phase selected from the group consisting of (a) 40 to 60 mole % SrO or BaO, 25 to 45 mole % B.sub.2 O.sub.3, 0 to 6 mole % ZnO, 0.25 to 2.0 mole % TiO.sub.2, 2 to 14 mole % SiO.sub.2 and (b) 40 to 60 mole % SrO or BaO, 25 to 45 mole % B.sub.2 O.sub.3, 5 to 20 mole % Al.sub.2 O.sub.3, 0.25 to 2.0 mole % TiO.sub.2.

Abstract: A ceramic composition for an electronic circuit board, a hybrid integrated circuit, an integrated circuit package or a multilayer ceramic structure, consisting essentially of at least one electrically insulating glass, at least one organic binder, at least one inorganic peroxide, and at least one material selected from the group which consists of: a metal selected from the platinum group; a compound of the platinum group; a manganese oxide; and a cobalt oxide.

Abstract: Improved copper conductor inks useful in fabricating multilevel circuits are provided. The inks comprise copper powder, a devitrifying glass frit which does not begin to flow until the furnace temperature is above about 700.degree. C., and a suitable organic vehicle. Devitrifying glass frits with these properties include a zinc-calcium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-zirconium-phosphosilicate glass frit and mixtures thereof. The inks are advantageous in that they form copper conductor layers having excellent properties without the inclusion of traditional flux materials such as bismuth oxide.

Abstract: This invention is concerned with a glass for optical and/or ophthalmic applications having an index of refraction between about 1.78-1.82, an Abbe number greater or equal to 31, and a density less than about 3.80 g/cm.sup.3 consisting essentially, expressed in terms of weight percent on the oxide basis, of:______________________________________ SiO.sub.2 15-30 CaO 15-28 B.sub.2 O.sub.3 2-17 SrO 0-11 SiO.sub.2 + B.sub.2 O.sub.3 24-36 BaO 0-11 Al.sub.2 O.sub.3 0-6.5 MgO + CaO + 16-33 SrO + BaO Li.sub.2 O 0-5 ZnO 0-11 Na.sub.2 O 0-5 La.sub.2 O.sub.3 16-30 K.sub.2 O 0-5 ZrO.sub.2 0-10 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 0-6 Nb.sub.2 O.sub.5 5-26 MgO 0-6 TiO.sub.2 0-14.

Abstract: The invention relates to a glass composition which can be used as an intermediate glass for sealing tunsten current supply wires in borosilicate glass, for example, for use in discharge lamps. The intermediate glass has a coefficient of expansion of from 38 to 44.10.sup.-7 K.sup.-1 and does not contain any sodium oxide, potassium oxide and lead oxide. Favorable thermal properties are obtained if the composition of the intermediate glass is kept within narrow limits.The invention also relates to an electric lamp in which the intermediate glass is used.

Abstract: The present invention is concerned with the preparation of glass microfoams and gas-ceramics having compositions selected from the systems of SiO.sub.2 --Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 --RO--R.sub.2 O, SiO.sub.2 --Al.sub.2 O.sub.3 (B.sub.2 O.sub.3)--P.sub.2 O.sub.5 --Li.sub.2 O--[ZrO.sub.2 (TiO.sub.2)], and SiO.sub.2 --P.sub.2 O.sub.5 --B.sub.2 O.sub.3 --[RO], wherein RO is selected from the group of MgO, CaO, SrO, BaO, and ZnO, and R.sub.2 O is selected from the group of alkali metal oxides. The foams comprise hydrogen-containing cells produced through the inclusion in the batch of a hydrogen-generating agent selected from the group of ammonium salts and/or a combination of amines and/or carbohydrates and/or hydrocarbons with phosphates.

Abstract: Neodymium-doped phosphate glasses having a refractive index, nd>1.520; an Abbe number, Vd, <60; a density <3.0 g/cm.sup.3, a thermal expansion coefficient, .alpha., .ltoreq.110.times.10.sup.-7 .degree.C..sup.-1 ; a Young's Modulus, E, <70.times.10.sup.3 N/mm.sup.2 ; a Poisson's Ratio, .nu., <0.28; a thermal conductivity, K, >0.5 W/m.multidot.K, a thermal FOM=(1-.nu.).multidot.K/.alpha.E>0.7, consisting essentially of, in mol. %:P.sub.2 O.sub.5 : 40-70%SiO.sub.2 : 0-20%B.sub.2 O.sub.3 : 5-20%Sum SiO.sub.2 +B.sub.2 O.sub.3 : 5-35%Sum Li.sub.2 O+Na.sub.2 O+K.sub.2 O: 5-20%Sum La.sub.2 O.sub.3 +Nd.sub.2 O.sub.3 : 3-10%Sum MgO+CaO+SrO+BaO+ZnO: 0-10%and preferably containing an amount of Nd.sub.2 O.sub.3 effective for laser activity having an emission cross-section, .sigma., >3.5.times.10.sup.-20 cm.sup.2 ; a fluorescence linewidth (.DELTA..lambda..sub.f1)<23.5 nm; a first e-folding time of the Nd.sup.3+ fluorescence at 0.5 wt. % Nd.sub.2 O.sub.3 >375 .mu.

Abstract: A ceramic composition for a multilayer printed wiring board, consisting essentially of from 35 to 95% by weight of glass powder and from 5 to 65% by weight of refractory filler powder, said refractory filler powder being at least one member selected from the group consisting of .alpha.-quartz, corundum, zircon and zirconia and said glass powder consisting essentially of from 25 to 40% by weight of SiO.sub.2, from 4 to 15% by weight of Al.sub.2 O.sub.3, from 15 to 25% by weight of B.sub.2 O.sub.3, from 15 to 40% by weight of BaO+CaO+MgO, from 1 to 10% by weight of ZnO and from 0.5 to 5% by weight of ZrO.sub.2.

Abstract: The invention relates to the formulation of a starting mixture for an insulating composition, comprising a vitreous phase and several ceramic phases in the respective ratios by volume for the vitreous phase between 85 and 60% and for the ceramic phases between 15 and 40%, the vitreous phase being a silicate of zinc and alkaline earth.According to an embodiment of the invention the starting mixture is remarkable in that the vitreous phase is constituted by the molar ratios of the following oxides:30 to 55% of silicon (SiO.sub.2), 15 to 30% of zinc oxide (ZnO), 0 to 20% of boric anhydride (B.sub.2 O.sub.3), 0 to 10% of alumina (Al.sub.2 O.sub.3), 15 to 40% of barium oxide (BaO), and in that the ceramic phases are constituted by the ratios by volume of the following oxides: 0 to 10% of cobalt oxide (Co.sub.3 O.sub.4), 5 to 20% of zinc oxide (ZnO), and 10 to 25% of lead oxide (PbO.sub.2).Application: Manufacture of microcircuits on colaminated metallic substrates.

Abstract: A glass for an eye glass lens comprising a SiO.sub.2 (or B.sub.2 O.sub.3)-CaO-Nb.sub.2 O.sub.5 system as a basic system and having a refractive index of 1.79 or more, an Abbe number of 32 to 38 and a specific gravity of less than 3.6 is disclosed.

Abstract: A strong white ceramic composition and method of making the same wherein said composition is characterized by an average coefficient of thermal expansion over the range of 25.degree. C. to 500.degree. C. ("Proposed American National Standards Institute/American Dental Association Specification No. 38.1 For Porcelain-Alloy Systems") of between 14 to 16.times.10.sup.-6 /.degree.C. and a transverse strength of about 18,000 psi or even greater. The ceramic composition comprises about 40 to 60% by weight crystalline magnesium oxide particles (e.g., 74 .mu.m ) dispersed in a modified silicate glass containing at least 3% by weight of dissolved ZrO.sub.2, TiO.sub.2 or mixtures thereof and is made by firing a powdered mixture of MgO.sub.2 and modified silicate glass at about 1150.degree. C. for sufficient time to produce a fine dispersion of forsterite (Mg.sub.2 SiO.sub.4) in the continuous glass matrix phase along with the crystalline magnesia particles.