Abstract: A lithium ion battery electrode formed by the pyrolysis of a silane polymer followed by introducing lithium ions. These electrodes can be used to form batteries with large capacities, low irreversible capacity, high density and good safety behavior.

Abstract: A method for manufacturing an organic solvent-soluble hydrogenated octasilsesquioxane-vinyl group-containing compound copolymer comprising reacting 1 mol of (A) a hydrogenated octasilsesquioxane described by formula I with 0.2 to less than 3 mol of (B) a divinyl group-containing compound described by formula (2) CH2═CH—L—CH═CH2   Formula 2 where L is selected from the group consisting of (a) a divalent hydrocarbon group comprising 3 to 10 carbon atoms and (b) —(SiR2O)m—SiR2—, where each R is independently selected from the group consisting of alkyls comprising 1 to 6 carbon atoms and aryls comprising 6 to 9 carbon atoms and 1≦m≦10; in the presence of a hydrosilylation catalyst.

Abstract: A method for preparing high density titanium diboride ceramic bodies in which titanium diboride powder is first mixed with a preceramic organosilicon polymer. The mixture is then molded and sintered under pressure or by a pressureless process.

Abstract: A borosilicate containing coating is formed on an electronic substrate by applying a borosilazane polymer on the substrate and converting it to borosilicate by heating in an oxidizing environment. The resultant thick planarizing coatings are useful as protective coatings and dielectric inner layers.

Abstract: A lithium ion battery electrode formed by the pyrolysis of a polycarbosilane followed by introducing lithium ions. These electrodes can be used to form batteries with large capacities, low irreversible capacity, high density and good safety behavior.

Abstract: This invention relates to the preparation of thermally stable, substantially polycrystalline silicon carbide ceramic fibers using borosilazane resins. The method comprises spinning fibers from the resin, infusibilizing the spun fibers and pyrolyzing the spun fibers at a temperature greater than about 1700.degree. C.

Abstract: The present invention relates to a method for preparing a ceramic fiber from alkenyl or alkynyl functional resins and to the ceramic fibers produced therefrom. The method comprises (A) forming a fiber from a siloxane resin comprised of R.sup.1.sub.a R.sup.2.sub.b RSiO.sub.(3-a-b)/2 units wherein R is an unsaturated carbon group; each R.sup.1 is selected from the group consisting essentially of an aryl group having from 6 to 10 carbon atoms and functional derivatives thereof; each R.sup.2 is selected from the group consisting essentially of an alkyl group having from 1 to 4 carbon atoms and functional derivatives thereof; a has a value of 0, 1 or 2; b has a value of 0, 1, or 2 with the proviso that a+b <2; (B) curing the fiber by exposing the fiber to high energy radiation to render it non-fusible; and (C) heating the non-fusible fiber in an inert environment to a temperature above about 800.degree. C. to convert it to a ceramic fiber.

Abstract: Disclosed are novel ceramic matrix composites in which coated refractory fibers are imbedded in a ceramic matrix derived from a modified hydrogen silsesquioxane resin.

Abstract: A lithium ion battery electrode formed by the pyrolysis of a siloxane polymer of the structure(R.sup.1 R.sup.2 R.sup.3 SiO.sub.0.5).sub.w (R.sup.4 R.sup.5 SiO).sub.x (R.sup.6 SiO.sub.1.5).sub.y (SiO.sub.4/2).sub.zfollowed by introducing lithium ions. In this structure, each R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are independently selected from the group consisting of hydrogen and a hydrocarbon, w is in the range of 0 to about 0.8, x is in the range of 0 to about 0.9, y is in the range of 0 to about 0.9, z is in the range of 0 to 1 and w+x+y+z=1.

Abstract: The present invention relates to a method for preparing a ceramic fiber wherein the method comprises (A) forming a green fiber from an alk-1-enyl ether functional siloxane resin of the general formula (R.sup.1 SiO.sub.3/2).sub.q (R.sup.2 SiO.sub.3/2).sub.r (R.sup.1.sub.w R.sup.2.sub.x RSiO.sub.(3-w-x)/2).sub.s (R.sup.1.sub.w R.sup.2.sub.x R.sup.3 SiO.sub.(3-w-x)/2).sub.t wherein R is an alk-1-enyl ether group; each R.sup.1 is selected from an aryl group having from 6 to 10 carbon atoms; each R.sup.2 is selected from an alkyl group having from 1 to 4 carbon atoms; R.sup.3 is an alkenyl group having from 2 to 10 carbon atoms; w has a value of 0, 1 or 2; x has a value of 0, 1, or 2 with the provisio that w+x.ltoreq.2; q has a value of 0 to 0.98; r has a value of 0 to 0.98; s is greater than zero; t.gtoreq.0; s+t=0.02 to 0.5 and q+r+s+t=1; (B) curing the green fiber to render it non-fusible; and (C) heating the non-fusible fiber in an inert environment to a temperature above 800.degree. C.

Abstract: This invention pertains to polycarbosilane hydroxides which contain units of the formula ##STR1## where R is a hydrocarbon having from 1 to 20 carbon atoms and to methods for their manufacture. The polycarbosilane hydroxides may be prepared by the oxidation of a polycarbosilane.

Abstract: Disclosed are novel ceramic matrix composites in which coated refractory fibers are imbedded in a ceramic matrix derived from a modified hydrogen silsesquioxane resin.

Abstract: Fiber reinforced ceramic matrix composites are prepared by coating refractory fibers having a interfacial coating thereon with a curable preceramic polymer having a char which contains greater than about 50% sealant oxide atoms followed by forming the coated fibers into the desired shape, curing the coated fibers to form a pre-preg, heating the pre-preg to form a composite and heating the composite in an oxidizing environment to form an in situ sealant oxide coating on the composite. The resultant composites have good oxidation resistance at high temperature as well as good strength and toughness.

Abstract: A method of crosslinking a silazane polymer having Si--H bonds in which the polymer is mixed with a crosslinker selected from alkenyl functional cyclosiloxanes and alkenyl functional cyclosilazanes and a crosslinking promoter and then heated to a temperature sufficient to crosslink the silazane polymer. The mixture of the silazane polymer, crosslinker and promoter is useful in the formation of ceramic matrix composites.

Abstract: A method of crosslinking a silazane polymer having Si--H bonds in which the polymer is mixed with a crosslinker selected from alkenyl functional cyclosiloxanes and alkenyl functional cyclosilazanes and a crosslinking promoter and then heated to a temperature sufficient to crosslink the silazane polymer. The mixture of the silazane polymer, crosslinker and promoter is useful in the formation of ceramic matrix composites.