PROCESS FOR PREPARING FINELY DISPERSIVE ZIRCONIUM DIOXIDE POWDER Russian patent published in 1997 - IPC

FIELD: technology of manufacture of stabilized zirconium dioxide. SUBSTANCE: colloidal zirconium solution containing yttrium additive is decomposed in plasma. Total content of metal oxides in the solution is 100-160 g/l. Yttrium oxide content in the solution is less than 5% of the total content of metal oxides. Colloidal solution is prepared by treating crushed zirconium oxynitrate with water at temperature not lower than 65 C. Yttrium oxide is added to heated colloidal zirconium salt solution. EFFECT: more efficient preparation process. 3 cl, 4 tbl