Patent ID: 6299791
Filing Date: 2001-10-09
Classification: C02F,C04B,H01L

Abstract:
A piezoelectric ceramic material containing at least Pb, Sr, Zr, Ti, Mn, Nb, Si and Al, comprising a principal component represented by the general formula of (Pb.sub.a Sr.sub.b)(Zr.sub.c Ti.sub.d Mn.sub.e Nb.sub.f)O.sub.3 wherein0.93 .ltoreq.a.ltoreq.1.010.01.ltoreq.b.ltoreq.0.040.37.ltoreq.c.ltoreq.0.470.48 .ltoreq.d.ltoreq.0.580.0105.ltoreq.e.ltoreq.0.060.02.ltoreq.f.ltoreq.0.06 and1.05.ltoreq.2e/f.ltoreq.2and wherein about 0.003% to 0.1% by weight of each of SiO.sub.2 and Al.sub.2 O.sub.3 are present relative to the weight of the principal component.