Patent ID: 6231779
Filing Date: 2001-05-15
Classification: B82Y,C01G,C01P,C04B,C30B,H01L

Abstract:
A piezoelectric ceramic material, comprising:a single crystal perovskite material of the formula, M.sub..alpha. Bi.sub..beta. M'.sub..gamma. M"".sub..delta. O.sub.3.+-.z,where M is one or more of Na, K, Rb and Cs; M' is one or more of Ca, Sr, Ba, Pb, Y, La, Pr, Nd, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb and Lu; and M"" is one or more of Ti, Zr, Hf, Sn, Ge, Mg, Zn, Al, Sc, Ga, Nb, Mo, Sb, Ta and W;where z.ltoreq.0.1; 0.9.ltoreq..gamma..ltoreq.1.1; .alpha., .beta. and .gamma. are greater than zero; and (.alpha.+.beta.+.gamma.) is in the range of about 0.75 to 1.1.