Patent ID: 6080328
Filing Date: 2000-06-27
Classification: C04B,H01L

Abstract:
A method for producing a piezoelectric ceramic element comprising the following steps:(1) calcining a mixture comprising oxides of Pb, Zr, Ti, Cr and Nb to obtain a calcined product;(2) crushing the calcined product and adding a Cu component in an amount of about 0.05-3.0 wt. % calculated as CuO to form a Cu-component-containing mixture;(3) adding a binder to the Cu-component-containing mixture to form a binder-containing mixture;(4) molding the binder-containing mixture to produce a molded product;(5) firing the molded product at 1100.degree. C. or less to produce a sintered product; and(6) forming electrodes on surfaces of the sintered product,wherein the sintered product is represented by the formula:Pb.sub.a [(Cr.sub.x Nb.sub.(1-x)).sub.y Zr.sub.(1-b-y) Ti.sub.b ]O.sub.3wherein 0.95.ltoreq.a.ltoreq.1.05; 0.40.ltoreq.b.ltoreq.0.55; 0.10.ltoreq.x.ltoreq.0.70; and 0.02.ltoreq.y.ltoreq.0.12, and a Cu component in an amount of about 0.05-3.0 wt. % calculated as CuO.