Abstract: Crack-free, dense and either amorphous or crystalline, nonoxide monolithic ceramic shaped articles are produced at relatively low temperatures, by shaping a powder (P) of an infusible, organometallic ceramic precursor polymer (Pi) into a green body having a relative density of at least 65%, and thence pyrolyzing such shaped green body.

Abstract: This invention relates to a sintered mullite-aluminum titanate article formed by doping the mullite with 1-5% titania and/or titania precursors, and 1-5% hematite and/or hematite precursors, pre-calcining the mullite and mixing with calcined aluminum titanate to form a mullite-aluminum titanate composition which may be formed into a high temperature stabilized ceramic article such as a honeycomb.

Abstract: Ceramics having principal phases of aluminum iron titanate and mullite corresponding to the overall chemical composition:50 to 62% by weight Al.sub.2 O.sub.3,36 to 49.5% by weight titanium oxide, expressed as TiO.sub.2,0.5 to 10% by weight SiO.sub.2, and0.2 to 15% by weight iron oxide, expressed as Fe.sub.2 O.sub.3,up to 1% by weight impurities,with the sum of Al.sub.2 O.sub.3, TiO.sub.2 and SiO.sub.2 being 100%,wherein the sum of the crystalline phases Al.sub.2 O.sub.3, TiO.sub.2, SiO.sub.2 (other than the principal phases) is less than 6% by weight, based on the sintered body, are useful where a ceramic having a high thermal-shock-resistance is required, such as exhaust port liner internal combustion engines, for example.

Abstract: The present invention discloses a multifunctional powder material for protecting buildings and process for the same. Said multifunctional powder material contains fine powders of refined limestone, dolomite and marble, a straight-chain alkyl acid or a straight-chain alkane containing 16-25 carbon atoms hydrophobic agent packed closely on the whole surfaces of said powders, the usage of said hydrophobic agent is at least 0.3 percent by weight (based on the total weight of the mixture of said powders).

Abstract: A moulding compound is described which contains an inorganic powder together with a binder system. The binder system contains a thermoplast having a melting temperature greater than 180.degree. C. A process is also described for making a sintered molding from the molding compound, which process includes the steps of injection moulding, removal of the binder by heating, and sintering.

Abstract: Optical parts and optical equipment, including lenses, mirrors and laser media made of athermal glasses having compositions comprising 0-13 mol % CdO, 9-24 mol % CdF.sub.2, 5-10 mol % LiF, 30-34.5 mol % AlF.sub.3 28-33.5 mol % PbF.sub.2, 0-4 mol % KF, 0-6.5 mol % YF.sub.3, and 0-2 mol % LaF.sub.3 and having little or no optical path length change as a function of temperature in the infrared region of 1.mu.m to 5.mu.m.

Abstract: A neutral, gray colored, nickel having a medium visible light transmittance between about 30 and percent, and low total solar energy and ultraviolet radiation transmittance, is produced with colorants comprising 0.40 to 0.58 percent by weight total iron expressed as Fe.sub.2 O.sub.3 (22 to 26 percent reduced to FeO), 0.006 to 0.018 Co.sub.3 O.sub.4, and 0.0006 to 0.0015 percent Se. The glass product having such a composition is particularly suitable for architectural applications.

Abstract: An inorganic particulate material comprising fine balls approximately uniform in size and 0.1 to 50 .mu.m in mean particle size and prepared by admixing an aqueous solution of at least one compound (i) selected from among halides of alkaline earth metals, inorganic acids, organic acids, ammonium salts or inorganic acids, ammonium salts of organic acids and carbonates of alkali metals with an aqueous solution of at least one inorganic compound (ii) selected from among silicates, carbonates, phosphates or sulfates of alkali metals, halides of alkaline earth metals, and sulfates, hydrochlorides or nitrates of copper family elements o iron family elements before or after admixing an organic solvent (iii) with said aqueous solution of at least one inorganic compound (ii) to form a W/O emulsion, said compound (i) being capable of forming a water-insoluble precipitate when subjected to an aqueous solution reaction with said inorganic compound (ii).

Abstract: A ceramic green sheet which is fired to give ceramic structure, and which is formed of a composition which principally consists of a ceramic powder, a binder, and a multiplicity of planar or elongate flakes which disappear upon application of heat, and which are oriented in the ceramic green sheet in a direction substantially parallel to opposite major surfaces of the green sheet. Also disclosed is an electrochemical element having a protective layer covering at least one electrode, which layer is prepared from the ceramic green sheet indicated above, and has a multiplicity of planar or elongate pores corresponding to the planar or elongate flakes included in the green sheet. A method of producing the electrochemical element is also disclosed.

Abstract: A highly concentrated zirconia sol is produced by a method which comprises heating an aqueous solution of a zirconium salt in the presence of urea thereby obtaining a transparent zirconia sol, concentrating the zirconium sol with an ultrafilter membrane, and subjecting the concentrated zirconic sol to thermal concentration at a temperature of not higher than 80.degree. C. The sol thus obtained enjoys lasting stability. Optionally, this sol may incorporate therein a chelating agent and a compound of a metal other than zirconium. A slurry of the zirconia sol incorporating therein minute refractory particles is useful for the manufacture of a porous ceramic article. A ceramic product obtained by firing this slurry is advantageously used in a mold for casting.

Abstract: Polysiloxanes containing both alkylhydrosiloxane units and alkylvinylsiloxane units which polysiloxanes are siloxy-endblocked that are useful as starting materials in the preparation of silicon oxycarbide ceramic compositions, a process for their preparation, a process for preparing silicon oxycarbide ceramic compositions therefrom, and novel silicon oxycarbide ceramic compositions are described.

Abstract: In accordance with the present invention, there are provided coating liquids for forming conductive coatings, which comprise (i) a zirconium oxysalt, (ii) a conductive substance and, if necessary, (iii) at least one member selected from non-sedimentary silica dispersion and silicon alkoxide or its derivative. The coating liquids, when coated on substrates, form thereon transparent conductive coatings which are excellent in transparency, scratch resistance, permanence properties and adhesion to the substrates and, moreover, excellent in antistatic effect. In particular, when the coating liquids for forming conductive coatings mentioned above are coated by the spray method on appropriate substrates followed by drying and/or heating, there are obtained face-plates for display devices, which have excellent regular reflection reducing effect (non-glare) and antistatic effect.

Abstract: It relates to fiber reinforced silicon carbide ceramics in which heat-resistant inorganic short fibers such as flawless SiC or Si.sub.3 N.sub.4 are three-dimensionally dispersed in a matrix composed of silicon carbide and entangled with each other to form a high strength shaped body as well as a method of producing the same. Further, it relates to high density silicon carbide ceramica in which metallic silicon is filled in pores of the shaped body, so that these fiber reinforced silicon carbide ceramics possesses both high strength and high toughness and are composite ceramics suitable as a heat-resistant structural material or a material with bio hard texture.

Abstract: The invention provides a conductor comprising a reaction-sintered body of a conductive nitride produced from a powder of at least one metal selected from Ti, Zr, V, Nb, Ta, Cr, Ce, Co, Mn, Hf, W, Mo, Fe, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Yb, Lu, Th and Ni, and a process for producing such conductor by heating a molding containing a metal powder in a nitriding gaseous atmosphere containing no CO gas.

Abstract: A coating fluid for forming an oxide coating, having a good thermal stability and superior coating-forming properties is provided, which fluid comprises a reaction product obtained by subjecting (A) an alkoxysilane or aryloxysilane expressed by the formula RmSi(OR).sub.4-m wherein R is 1-4C alkyl or aryl and m is 0 to 2 and (B) a metal alkoxide or aryloxide compound expressed by the formula M(OR').sub.n wherein M is Mg, B, P, Zr, Y, Ti or Ba, R' is 1-4C alkyl or aryl and n is a valence of the metal atom to hydrolysis and condensation using a catalyst in the presence of a solvent.

Abstract: The invention provides a metallic composition and methods for making and using the same. In a preferred embodiment the metallic composition forms a conductor path and is bonded to a substrate of aluminum nitride. The metallic composition comprises Mo, Si, Cu and Mn. The Si may be present in the metallic composition as MoSi.sub.2. The metallic composition may be produced by firing a paste that has been applied to a substrate of aluminum nitride. The paste comprises an organic vehicle and a metallic powder. The metallic powder preferably comprises about 60% to about 90% by weight Mo, about 0.5% to about 15% by weight MoSi.sub.2, about 5% to about 20% Cu and up to about 20% by weight Mn.

Abstract: Process for producing ceramic compositions by dispersing elemental silicon powder in a ceramic precursor polymer containing Al, N, and C, shaping the resultant composition, and heating the shaped product to cause a reaction between the elemental silicon and the polymer to result in an intermediate composition and further heating the intermediate composition to a temperature sufficient to consolidate the char to a dense SiC--AlN solid-solution or microscopic ceramic.

Abstract: Powdered aluminum is added to a nitrate-containing alkaline, aqueous solution to reduce the nitrate and/or nitrite to ammonia and co-produce a sinterable ceramic product.

Abstract: This invention relates generally to a novel method of forming self-supporting bodies and the novel products made thereby. In its more specific aspects, this invention relates to a method of producing self-supporting bodies comprising one or more boron-containing compounds by reacting a powdered parent metal with a bed or mass comprising a boron source material and a carbon source material (e.g., boron carbide) and/or boron source material and a nitrogen source material (e.g., boron nitride) and, optionally, one or more inert fillers. More specifically, the reaction occurs under the application of an externally applied pressure.

Abstract: Stabilized phosphogypsum-containing compositions with low expansion and high compressive strength characteristics are prepared by admixing phosphogypsum with a cementitious binder having a calculated zero percent tricalcium aluminate content The compositions may contain phosphogypsum and cementitious binder only or they may also include sand or other filler material. The phosphogypsum composition is wetted with water, compacted and allowed to cure. The amount of water added preferably produces a maximum density of the compacted composition.