| 摘要 |
A piezoelectric ceramic composition includes a main component represented by general formula {(Pb1-x-yCaxSry) {Ti1-z(Ni1/3Nb2/3)z}O3}, wherein 0≦̸x≦̸0.2 (preferably 0≦̸x≦̸0.15), 0≦̸y≦̸0.2 (preferably 0≦̸y≦̸0.1), 0.05≦̸x+y≦̸0.2, and 0.02≦̸z≦̸0.1. Furthermore, a Mn component is preferably present in an amount of 1.0 part by weight or less (excluding zero) (more preferably 0.05 to 1.0 part by weight) in terms of MnCO3 with respect to 100 parts by weight of the main component. A piezoelectric element includes a piezoelectric ceramic body composed of this piezoelectric ceramic composition. Firing can be performed at a low temperature of about 1,100° C. The piezoelectric element has a high Curie point Tc, can withstand solder reflow treatment, and achieves satisfactory piezoelectric properties. |
