Abstract: Improved copper conductor inks useful in fabricating multilevel circuits are provided. The inks comprise copper powder, a novel zinc-aluminum-lead-borosilicate glass frit, bismuth oxide and a suitable organic vehicle. The inks are advantageous in that the films formed therefrom are oxidation resistant and have a reduced tendency for flux components to leach into adjacent dielectric films.

Abstract: Cordierite series dense and low expansion ceramics have excellent thermal shock resistance property, being airtight, heat resistant and having high dimensional stability at high temperatures can be achieved by incorporating 2-10% by weight of P.sub.2 O.sub.5 in the cordierite ceramic and acid treating the fired or sintered body to selectively remove P.sub.2 O.sub.5 to primarily result in an amount of 0.1% by weight of P.sub.2 O.sub.5 remaining in the sintered body.

Abstract: The present invention disclosed a magnesia clinker excellent in corrosion resistance, which is useful for a magnesia carbon refractory and also for a refractory for steel manufacturing furnace, and the magnesia clinker is characterized by:(a) having a purity of MgO of 97 wt. % or higher;(b) containing 2.0 wt. % or less of CaO;(c) containing 0.01 wt. % or more of B.sub.2 O.sub.3 ;(d) containing 0.3 wt. % or less of SiO.sub.2 ;(e) containing impurities other than MgO, CaO, B.sub.2 O.sub.3 and SiO.sub.2 of 2 wt. % or less;(f) having a bulk density of 3.35 (g/cc) or higher and an apparent porosity of 3.0 (vol. %) or less; and(g) having a mean crystal size of magnesia of 100 .mu.m or larger.

Abstract: A sintered alumina porcelain composition is described consisting of a ternary composition consisting of from 96 to 99 mol % of Al.sub.2 O.sub.3 and the remainder consisting of CaO and TiO.sub.2 present in a CaO/TiO.sub.2 molar ratio of from 0.8/1 to 1.1/1 and SiO.sub.2, wherein based on 100 parts by weight of the ternary Al.sub.2 O.sub.3 --CaO--TiO.sub.2 composition, SiO.sub.2 is present in an amount within the range defined by the area within the straight lines connecting points A-B-C-D-E-F-A in the composition diagram set forth in the attached drawing for describing the relationship between the SiO.sub.2 content and the Al.sub.2 O.sub.3 molar ratio, provided that point A is excluded from the range of the SiO.sub.2 content, with said points having the following locations:______________________________________ SiO.sub.2 Al.sub.2 O.sub.3 (parts by weight) (mol %) ______________________________________ Point A 0 96 Point B 0.01 98 Point C 0.03 99 Point D 1.20 99 Point E 0.48 98 Point F 0.

Abstract: An overglaze ink comprising(a) 55 to 70 weight % of a glass composition, the glass composition comprising(1) 15 to 43 weight % of a main glass component selected from the group consisting of BaO, SrO and SrO+BaO,(2) a glass forming component comprising34 to 45 weight % B.sub.2 O.sub.3 and0 to 6 weight % SiO.sub.2(3) 0 to 2 weight % of a colorant selected from the group consisting of Cr.sub.2 O.sub.3, CoO and NiO,(4) 7 to 20 weight % of a thermal expansion modifier selected from the group consisting of ZnO, Al.sub.2 O.sub.3, TiO.sub.2 and mixtures thereof, and(5) 1 to 7 weight % of a dopant comprising one or more of the following:ZnF.sub.2 having a weight % of 0 to 5,Li.sub.2 O having a weight % of 0 to 2,Na.sub.2 O having a weight % of 0 to 2,K.sub.2 O having a weight % of 0 to 2,LiF having a weight % of 0 to 2,NaF having a weight % of 0 to 2,KF having a weight % of 0 to 2,BaF.sub.2 having a weight % of 0 to 2,Na.sub.2 SiF.sub.6 having a weight % of 0 to 2,PbO having a weight % of 0 to 3,V.sub.2 O.sub.

Abstract: A piezoelectric ceramic composition consists essentially of a main component consisting of lanthanum modified lead titanate and lead stanate antimonate, and an auxiliary component consisting of manganese oxide. The content of the main component is 98 to 99.0 mole % when expressed by the general formula:yPb(Sn.sub.1/2 Sb.sub.1/2)O.sub.3 -(1-y)(Pb.sub.1-3x/2 La.sub.x)TiO.sub.3(where 0.01.ltoreq.x.ltoreq.0.06 and 0.01.ltoreq.y.ltoreq.0.06), and the content of the manganese oxide is 0.1 to 2 mole % when converted into an amount of MnO.sub.2.

Abstract: This invention is directed to a method for modifying the coloration produced in a silver halide-containing photochromic glass when heat treating the glass at a temperature not exceeding 450.degree. C. under reducing conditions. The method comprises subjecting such a glass having a base composition which contains at least 1% by weight Li.sub.2 O, at least 2% by weight Na.sub.2 O, and at least 6% by weight Li.sub.2 O+Na.sub.2 O+K.sub.2 O to an ion exchange reaction, wherein lithium ions, and potassium ions, when the latter are present in the composition, in the glass surface are exchanged with sodium ions from an external source, prior to the reduction heat treatment.

Abstract: A cement composition is suitable for underwater concreting and comprises 100 parts by weight of cement and 0.1 to 2.0 parts by weight of carboxymethyl hydroxyethyl cellulose.

Abstract: A mortar composition comprises a mortar and a carboxymethyl hydroxyethyl cellulose (CMHEC) having a degree of substitution (DS), by carboxymethyl group per a glucose unit, of 0.7 or less and a molar substitution (MS), by ethylene oxide per a glucose unit, of 1.2 to 7.0.

Abstract: This invention relates to a high-strength molybdenum silicide-based ceramic material and a process for producing such ceramic material. A powder mixture obtained by adding to titanium carbonitride 0-100% by weight of a specific metal boride compound is added to powder of molybdenum silicide used as base component, and the obtained mixed powder composition is sintered. Both strength and density of molybdenum silicide are increased while maintaining its low-temperature sinterability.

Abstract: A highly dense Si.sub.3 N.sub.4 sintered body having a substantially crystalline intergranular phase, which has an improved mechanical strength at high temperatures and excellent static fatigue properties so as to be particularly useful for high temperature structural components or parts, is produced by sintering a molded body of a blend comprising Si.sub.3 N.sub.4, Y-, Mg- and Ce-compounds with a specified composition range.

Abstract: A dielectric ceramic composition for microwave applications comprises a mixture represented by the general formula:xBaO-yTiO.sub.2 -z{(Sm.sub.2 O.sub.3).sub.100-(w.sbsb.1.sub.+w.sbsb.2.sub.) (CeO.sub.2).sub.w.sbsb.1 (La.sub.2 O.sub.3).sub.w.sbsb.2 }wherein x, y, z, w.sub.1 and w.sub.2 are mole % of respective components, 6.ltoreq.x.ltoreq.22, 59.ltoreq.y.ltoreq.79.5, 2.ltoreq.z.ltoreq.34.5, x+y+z=100, and 0<(w.sub.1 +w.sub.2).ltoreq.95, and wherein both w.sub.1 and w.sub.2 are exclusive of zero.Further this composition may include MnO.sub.2 as another component of which the amount is 4 weight % and less on the basis of total weight of BaO, TiO.sub.2, Sm.sub.2 O.sub.3, CeO.sub.2 and La.sub.2 O.sub.3.Since this composition has a high specific dielectric constant .epsilon.r, a high no load value Q and a positive or negative temperature coefficient .eta.f of about zero, it can be used as a microwave dielectric resonator, a temperature compensating capacitor or the like.

Abstract: A composition for dielectric porcelain comprises BaTiO.sub.3 and 1 to 5 mole % of a compound with a molar ratio of Bi.sub.2 O.sub.3 :RuO.sub.2 =1:2 based on said BaTiO.sub.3.

Abstract: Platinum corrosion reducing amounts of a premelted oxide mixture that is PbO and B.sub.2 O.sub.3, or PbO and SiO.sub.2, or PbO, SiO.sub.2 and B.sub.2 O.sub.3 are added to raw batch ingredients for a lead-containing solder glass. All or part of the Pb.sub.3 O.sub.4 or PbO normally used in the raw batch is replaced for advantages including reducing the amount of platinum corrosion in a platinum melter used to melt the raw batch to provide the glass.

Abstract: A high dielectric porcelain composition having, as a main component, a Pb(Mg 1/3, Nb 2/3)O.sub.3 -PbTiO.sub.3 -Pb(Mn 1/3, Nb 2/3)O.sub.3 system including 95 mol. % of Pb(Mg 1/3, Nb 2/3)O.sub.3, 5 mol. % of PbTiO.sub.3 and 0.5 weight % of Pb(Mn 1/3, Nb 2/3)O.sub.3, and, in addition, a sub-component including PbO and ZnO. Such a dielectric porcelain is capable of being sintered at a temperature lower than 1000.degree. C. A method of reducing the sintering temperature of such a high dielectric porcelain composition, is also provided.

Abstract: A sintered body of zirconia ceramic comprising 74 to 87% by weight of ZrO.sub.2 and 26 to 13% by weight of CeO.sub.2, and 0.1 to 20% by weight of Al.sub.2 O.sub.3 and 99.9-80% by weight of ZrO.sub.2 --CeO.sub.2 in the form of tetragonal crystals with 20% by weight or less of monoclinic and/or cubic crystals, is excellent in mechanical strength, were resistance and thermal stability.

Abstract: Liquid fluid loss control additives for oil field cements are provided which have long storage lives without excessive settling and which can be mixed with cement slurries without the formation of gel balls or fish eyes. The liquid additives consist essentially of a liquid hydrocarbon, a hydrophilic water soluble polymer, an organophilic clay suspending agent, an organic sulfonate dispersant, a polyamide amine surfactant for oil wetting the polymer and a surfactant for stripping liquid hydrocarbon from the polymer when contacted with water.

Abstract: A medium weight abrasion-resistant castable for use as a refractory lining having a bulk density of no greater than 130 lbs/cu ft, and abrasion loss of no greater than about 25 cc and a thermal conductivity of no greater than 5.5 BTU/hr/ft.sup.2 /in/.degree.F. includes a coarse aggregate of cordierite. The composition also includes an intermediate sized aggregate of calcined kaolin or calcined flint and a finer sized aggregate of calcined kaolin or calcined flint, fly ash cenospheres, clay, fume silica, and cement.

Abstract: The invention is a process for the manufacture of shaped articles of reaction-bonded silicon nitride in which pre-shaped articles of silicon powder are heated in a first stage under a nitrogen gas pressure of at least 6 MPa at a heating rate of not more than 50.degree. C. per hour to a reaction temperature below the melting point of silicon, the article is maintained at the reaction temperature for at least 0.5 hours and subsequently, in a second stage, heating the article at a heating rate of at least 500.degree. C. per hour to a temperature above the melting point of silicon and maintaining the article at that temperature for from 1 to 7 hours. The process can nitridate both pre-shaped articles consisting of silicon powder and, optionally, up to 15% by weight Si.sub.3 N.sub.4 powder and those containing up to 10% by weight of a sintering aid such as Y.sub.2 O.sub.3.

Abstract: Hydraulic cement composition with delayed setting, intended to be employed in an environment which may be under extreme temperature, pressure and salinity conditions, the composition being characterized in that it incorporates(a) a saline or nonsaline aqueous liquid phase,(b) at least one hydraulic cement,(c) a setting-retarder adjuvant preserving and/or improving the rheological properties, a water-soluble copolymer resulting from the copolymerization of ethylenic acids, acrylamides and ethylenic esters of phosphoric acid.