| 摘要 |
A piezoelectric porcelain composition which has a composition represented by the empirical formula: (Pb(a-b)Meb){(Ni(1-c) /3Znc/3 Nb2d/3)zTix Zr(1-x-z)}O3, wherein the above Me is at least one element selected from among Ba, Sr and Ca, the above a, b, d and x are 0. 975 <= a <= 0.998, 0 <= b <= 0.05, 1 < d <= 1. 3 and 0.39 <= x <= 0.47, respectively, and the above c and z are present, in the zc plane, in the inside or on the line of a region enclosed by the straight lines tying the point A (z=0.25, c=0.1), the point B (z=0.25, c=0.85), the point C (z=0.1, c=0.6), the point D (z=0. 075, c=0.5), the point E (z=0.05, c=0.2) and the point F (z=0.05, c=0.1); and a piezoelectric actuator using the above composition. The above piezoelectric porcelain composition can achieve a great piezoelectric constant, a low dielectric constant and a high Curie point, in combination. |
