PRODUCTION OF ELECTRICALLY-CONDUCTIVE POWDER COATED WITH TIN OXIDE DOPED WITH ANTIMONY OXIDE

摘要

PURPOSE: To provide a whitish superconducting powder showing white or a color, having electrically conductive function. ;CONSTITUTION: In coating the surface of inorganic powder with tin oxide doped with antimony oxide, an aqueous solution of hydrochloric acid of tin chloride and an alkali aqueous solution are simultaneously added to an aqueous solution suspending the inorganic powder, the inorganic powder is coated with tin hydrate precipitated by hydrolysis, successively a mixed aqueous solution of hydrochloric acid of tin chloride and antimony chloride and the alkali aqueous solution are simultaneously added to the solution to give a tin hydrate containing antimony hydrate coprecipitated on the inorganic powder coated with the tin hydrate. The tin hydrate is heated and burnt and an oxide tin layer doped with antimony oxide is formed to produce electrically conductive powder. Consequently, powder obtained by this method is observed to have much more improved effects on electrical conductivity than powder coated with the same amount by the conventional method and a raw material supply source is widened.;COPYRIGHT: (C)1993,JPO&Japio