| 摘要 |
To provide a piezoelectric porcelain which has a high coercive field value and can be fired at a low temperature of 950°C or below. The composition of the piezoelectric porcelain is expressed by the following general formula; Pbx-a-dBiaM3d{M1b(M21/3Nb2/3)yZr1-b-y-zTiz}O 3 (M1 and M2 are at least one of Ni and Zn, M3 is at least one of Ba and Sr), and the above mentioned a, b, d, x, y and z satisfy the inequalities of 0.05<=a<=0.15, 0<b<=0.075, 0<=(a-2b), 0<=d<=0.1, 0.97<=x<=1.00, 0.020<=y<=0.250, 0.398<=z<=0.512. Furthermore, preferably the M1 is Ni and the M2 is at least one of Ni and Zn. More preferably, Ni is in a segregated state. |
