Patent ID: 6383408
Filing Date: 2002-05-07
Classification: C04B,H01L,H03H

Abstract:
A piezoelectric ceramic comprising:lead, manganese, niobium, titanium and zirconium as primary metal components; wherein the composition of the piezoelectric ceramic is represented by the formula Ax{(MnaNbb)yTizZr(1âˆ’yâˆ’z)}O3, in which, on a molar basis, 0.95&lE;x&lE;0.995, 0.055&lE;y&lE;0.10, 0.40&lE;z&lE;0.55, 2.01&lE;b/a&lE;2.40, and a+b=1, and in which A is Pb or the combination of Pb and one of Sr, Ba and Ca; and wherein the average grain diameter of the sintered piezoelectric ceramic is about 2 &mgr;m or less.