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: A superconductive ceramic wire material composed of rare earth elements, alkali earth metals, copper, and oxygen, which is obtained by mixing a powder containing oxides of the component elements of the superconductive ceramic with a solution containing organic compounds of the component elements, forming the mixture into a wire, and firing the wire in a temperature range from 850.degree. to 949.degree. C. in an oxygen-containing atmosphere.

Abstract: Calcium phosphate series compound ceramics are provided 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 calcium phosphate series compound and entangled with each other to form a high strength shaped body as well as a method of producing the same. Also, a high density silicon carbide ceramic is provided in which biological glass is impregnated and filled in a porous shaped body. These composite ceramics have high strength and high toughness and are suitable as a heat-resistant structural material or a material for bio hard texture.

Abstract: A superconductive ceramic wire or film comprises 100 parts by weight of superconductive oxide crystal composed of a rare earth element, an alkaline earth metal, copper, and oxygen, and 0.2-5.0 parts by weight of copper oxide, thereof.

Abstract: It relates to calcium phosphate series compound 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 calcium phosphate series compound and entangled with each other to form a high strength shaped body as well as a method of producing the same. And also, it relates to a high density silicon carbide ceramic in which biological glass is impregnated and filled in a porous shaped body, which provides composite ceramics having high strength and high toughness and suitable as a heat-resistant structural material or a material for bio hard texture.

Abstract: In the production of SiC whisker for composite materials such as FRP, FRM, FRC and the like by vapor phase synthesis between silicon sulfide and carbon compound, SiC whisker suitable for the continuation and mass production is produced in industrial scale by using metallic Si as a starting material through a stage of contacting the metallic silicon with hydrogen sulfide gas to produce silicon sulfide gas, and a stage of contacting the silicon sulfide gas with carbon compound and, if necessary, a formed nucleus to deposit and grow whisker.