Zirconium dioxide - - aluminum oxide composite powder and method for its production

摘要

A process for the preparation of a zirconium dioxide - aluminum oxide - composite powder whicha) 60 to 95 w -% zirconium dioxide and 5 to 40 w -% aluminium oxide andb) the crystallite size, after a thermal treatment at 1500°C, 50 to 100 nm, determined by x-ray structure analysis, is,in the case of whichc) a dispersion whichc1) zirconium dioxide particles having a mean particle diameter d₅₀ from 50 to 100 nm as a solid phase andc2) a solution of water and one or more aprotic - polar solvents as the liquid phase containsd) with a solution, which with the liquid phase of the dispersion being miscibled1) in each case one or more aluminum alkoxides and complexing agents - in an aprotic polar solvent, which are identical or different from that of the dispersion is, ord2) in each case one or more aluminium salts, in an aqueous solvent comprises,reacted.By means of this method available zirconium dioxide - - aluminum oxide composite powder.