Patent ID: 6402981
Filing Date: 2002-06-11
Classification: C04B,H01L

Abstract:
A composition of piezoelectric porcelain comprising:a main component including x(Pb2Sb2O7)Â½. (1âˆ’x)[Pba(ZryTiz)O3], provided that 0.98&lE;a&lE;0.999, 0.005&lE;x&lE;0.05, 0.50&lE;y&lE;0.54, 0.46&lE;z&lE;0.50, and y+z=1; 0.1 to 1.0 wt % of at least one of W, Sb, Nb, and Ta in terms of WO3, Sb2O3, Nb2O5, and Ta2O5 to the weight of 1 mol of the main component; and 0.01 to 0.1 wt % of Si in terms of SiO2 to the weight of 1 mol of the main component.