| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric porcelain composition capable of obtaining an element having >200×1012 m/v piezoelectric strain constant (d31) of mode of vibration due to elongation in the major side direction and a sufficiently high Curie temperature, less liable to the deterioration of displacement as an actuator and having high grain boundary strength. SOLUTION: At least one selected form W, Sb, Nb and Ta is added as a subsidiary component to Pbx[(CO1/3Nb2/3)aTiBZr1-a-b]O3 (where 0.98<=x<=0.999, 0.01<=a<=0.03 and 0.43<=b<=0.49) as a principal component by 0.1-1.2 wt.% (expressed in terms of WO3, Sb2O3, Nb2O5 and Ta2O5) based on 1 mol principal component and Si is further added as a subsidiary component by 0.01-0.1 wt.% (expressed in terms of SiO2). |
