Abstract: This invention is directed to a method for making metal-aluminum-oxide materials according to sol-gel techniques from particularly defined heterobimetallic alkoxides comprising bis[bis(2-propanolato)aluminum)-tetrakis(.mu.-(2-propanolato)]alkaline-ear ths and, optionally, tris [(bis(2-propanolato)aluminum)hexakis(.mu.-(2-propanolato))]-lanthanides, and the materials so made. The materials may be in varied forms like sols, gels, xerogels, and calcined materials.

Abstract: A titanium tetrahalide is reacted with a disilazane to prepare a titanium containing organometallic precursor, which is thereafter mixed with a refractory material powder and pyrolyzed to form a titanium nitride-containing refractory material composite containing crystalline titanium nitride.

Abstract: A catalyst having high temperature (800.degree.-1050.degree. C.) stability and improved three-way automotive exhaust gas catalyst activity at high temperatures, comprising an outer catalytic coating of binary La-Pd oxide (La.sub.2 Pd.sub.2 O.sub.5 or La.sub.4 PdO.sub.7) calcined and supported on a catalyst-supporting substrate, the oxide being present in an amount to provide 15-150 g of Pd per cubic foot of the substrateA method of making binary La-Pd oxides useful as an automotive exhaust catalyst operative at high temperatures, comprising heating in an oxidizing atmosphere a mixture containing La compounds and Pd compounds in a La:Pd ratio of 1:1 or 4:1, the heating being staged to first heat slowly from about 50.degree. C. to start decomposition of the compounds and thereafter retaining the residue at an elevated temperature to stimulate growth of crystalline binary La-Pd oxides and to calcine the crystalline oxides.

Abstract: This invention is directed to a method of providing a channeled substrate with a porous washcoat used as a supporting structure for a catalyst. The substrate is coated with a reactive mixture made of components comprising aluminum alkoxide, water, and acid or the alkoxide in an alcohol. The aluminum alkoxide contains hydrolyzable alkoxy groups and has the chemical formula: Al(OR).sub.3, where R is an alkyl or branched alkyl group of 3 to 6 carbon atoms. The method also includes drying and calcining the coating to form a .gamma.-alumina washcoat.

Abstract: The disclosure is directed to compositions and methods for forming boron nitride coatings, using polymers derived from tri-substituted borazine and chloroborazine compounds. The polymeric compounds are mixed with ammonia, pyrolized at high temperatures to obtain a high temperature melt, and further converted to boron nitride coatings on various substrates. The polymeric compounds can be stored prior to pyrolysis.

Abstract: The disclosure is directed to polymeric B-aminoborazene compounds suitable for pyrolytic conversion to boron nitride. The B-aminoborazine compounds are preferably mixed with an organic solvent and a cross-linking agent to form a polymeric gel. The polymeric gel is then pyrolized to form boron nitride. The polymeric gel is useful to coat various forms and materials.

Abstract: This invention is directed to a method for lanthanide-aluminum-oxide materials according to sol-gel techniques from heterobimetallic alkoxides comprising tris[(bis(2-propanolato)alumina)hexakis(.mu.-(2-propanolato) )] lanthanides, and the materials so made. The materials may be in varied forms like sols, gels, xerogels, and calcined materials.

Abstract: A titanium tetrahalide is reacted with at least one disilazane to prepare a titanium-containing organometallic precursor, which is thereafter pyrolyzed to form crystalline titanium nitride.

Abstract: The disclosure is directed to polymeric B-aminoborazene compounds suitable for pyrolytic conversion to boron nitride. The B-aminoborazene compounds are preferably mixed with an organic solvent and a cross-linking agent to form a polymeric gel. The polymeric gel is then pyrolized to form boron nitride. The polymeric gel is useful to coat various forms and materials.

Abstract: Aluminum oxynitride is prepared by the pyrolysis of an organosiloxydihaloalane such as trimethylsiloxydichloroalane in the presence of a nitrogen-containing atmosphere. The organosiloxydihaloalane may conveniently be prepared by reacting together an aluminum halide and at least one disiloxane.

Abstract: The disclosure is directed to polymeric B-aminoborazene compounds suitable for pyrolytic conversion to boron nitride. The B-aminoborazene compounds are preferably mixed with an organic solvent and a cross-linking agent to form a polymeric gel. The polymeric gel is then pyrolized to form boron nitride. The polymeric gel is useful to coat various forms and materials.