Patent ID: 6207069
Filing Date: 2001-03-27
Classification: C04B,H01L

Abstract:
A piezoelectric ceramic composition, comprising:a main component represented by the formula:(Pb.sub.1-a A.sub.a)(Zn.sub.1/3 Nb.sub.2/3).sub.x Ti.sub.y Zr.sub.z O.sub.3wherein A is at least one metal element selected from the group consisting of calcium, strontium, and barium; andwherein letters a, x, y, and z representative of molar ratios are numbers; andwherein 0.ltoreq.a.ltoreq.0.1, x+y+z=1, 0.05.ltoreq.x.ltoreq.0.4, 0.1.ltoreq.y.ltoreq.0.5, and 0.2.ltoreq.z.ltoreq.0.6; andan auxiliary component containing manganese oxide and either antimony oxide or antimony oxide and niobium oxide, the content of manganese oxide calculated as MnO.sub.2 being 0.05 to 3% by weight based on the weight of the main component and the total content of antimony oxide and niobium oxide, calculated as Sb.sub.2 O.sub.3 and Nb.sub.2 O.sub.5, respectively, being 0.05 to 5% by weight based on the weight of the main component.