Patent ID: 6090306
Filing Date: 2000-07-18
Classification: C04B,H01L

Abstract:
A piezoelectric ceramic having a composition of the general formula,(Pb.sub.a-x-y-z Sr.sub.x Ln.sub.y Bi.sub.z)(Ti.sub.1-b-c Mn.sub.b Me.sub.c)O.sub.3wherein Ln is at least one element selected from the group consisting of La, Ce and Pr, Me is at least one element selected from the group consisting of Nb, Sb and Ta, and x, y, z, a, b and c represent molar ratios,the composition satisfying0.ltoreq.x.ltoreq.0.2,0<y.ltoreq.0.1,0.001.ltoreq.z.ltoreq.0.1,0.93.ltoreq.a.ltoreq.1,0.005.ltoreq.b.ltoreq.0.05, and0.005 .ltoreq.c.ltoreq.0.05.