Patent ID: 6051157
Filing Date: 2000-04-18
Classification: C04B,H01L

Abstract:
A piezoelectric ceramic composition comprising a component represented by the general formula of x(Pb.sub.2 Me.sub.2 O.sub.7).sub.1/2 .multidot.(1-x)[Pb(Zr.sub.1-y Ti.sub.y)O.sub.3 ], in which x and y are numerical values satisfying the relations 0.01.ltoreq.x.ltoreq.0.05 and 0.40.ltoreq.y.ltoreq.0.55, and Me is at least one of Sb, Nb and Ta;0.1 to 0.8% by weight of Cr calculated in terms of chrome oxide with respect to the weight of 1 mol of said component; and0.01 to 0.1% by weight of Si calculated in terms of silicon oxide with respect to the weight of 1 mol of said component.