| 摘要 |
PROBLEM TO BE SOLVED: To produce a piezoelectric ceramic which can be burned at a low temperature in a short time without deteriorating its piezoelectric characteristics, and to obtain a composition therefore. SOLUTION: In the piezoelectric ceramic composed of a sintered compact essentially consisting of Sr2 NaNb5 O15 , the average grain size of the crystals of the sintered compact is <=10 μm, and further, the ceramic consists of a sintered compact obtained by incorporating Ti or Ti and Ba in 0.1 to 3.0% by weight expressed in terms of TiO2 and BaCO3 into a composition of Sr2-x Cax NaNb5-y Tay O15 (0.01<=x<=0.5, and 0.01<=y<=2.0). |
