PRODUCTION OF FERROELECTRIC CERAMICS

摘要

PURPOSE: To easily produce PZT having high mechanical strength. CONSTITUTION: Powders of PbO, TiO2 and ZrO2 as starting materials are prepd. so as to give a compsn. deficient in Pb in anticipation of the deposition of ZrO2 . The powders are mixed and this powdery mixture is calcined under conditions not causing scattering due to the sublimation of PbO. The resultant calcined product is fired at 900-1,200 deg.C under conditions not causing scattering due to the sublimation of PbO and fine ZrO2 is dispersed and deposited in Pb(Zrx Ti1-x )O3 (0.4<=x<=0.6) during the firing to obtain the objective ferroelectric ceramics contg. ZrO2 of <=1μm average particle diameter dispersed and deposited in the Pb(Zrx Ti1-x )O3 matrix.