Patent ID: 6118209
Filing Date: 2000-09-12
Classification: C04B,H01L

Abstract:
A piezoelectric ceramic composition represented by a composition formula, (Pb.sub.u A.sub.1-u).sub.v {(Zn.sub.1/3 Nb.sub.2/3).sub.w (Sn.sub.1/3 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z }.sub.2-v O.sub.3, where the symbol A is at least one component selected from a group consisting of La, Nd, Pr, and Bi, and u, v, w, x, y, and z are within ranges represented by the following Equations, characterized in that 0.1 to 3 mole percent of a Mn compound calculated in terms of MnO.sub.2 is added to said piezoelectric ceramic composition:w+x+y+z=1 [Equation 1]0.85.ltoreq.u.ltoreq.0.990.97.ltoreq.v.ltoreq.1.030.01.ltoreq.w.ltoreq.0.200.01.ltoreq.x.ltoreq.0.150.35.ltoreq.y.ltoreq.0.480.30.ltoreq.z.ltoreq.0.50