| 摘要 |
PROBLEM TO BE SOLVED: To obtain a piezoelectric porcelain compsn. for an actuator capable of firing it at a low temp. and indicating a high piezoelectric strain constant d33 in a wide service temp range even when it is fired at a low temp. SOLUTION: The piezoelectric porcelain compsn. contains at least Ba, Ti and Zr as metallic elements, and contains a main component in which (x) and (y) satisfy 0.96<=(x)<=1.04 and 0.01<=(y)<=0.12 when a compsn. formula based on their molar ratios is expressed as Bax(Ti1-y Zry )O3 and 0.05-2.0 pts.wt. Cu expressed in terms of CuO per 100 pts.wt. the main component. |
