| 摘要 |
Provided is a piezoelectric ceramic which achieves a high density, good temperature characteristics and a high Curie temperature, which can fully prevent (a) a decrease in Qmax (Qmax refers to a tan theta max when the maximum value of phase angles of third harmonic is a theta max), (b) a decrease in q (dynamic range of resonance frequency), (c) an increase in a fundamental wave and (d) the occurrence of a spurious mode in the vicinity of third harmonic, caused by downsizing, and which can materialize a small-sized high-performance piezoelectric element, the piezoelectric ceramic having a composition of the general formula,(Pba-k-y-zSrxLnyBiz)(Ti1-b-cMnbMec)O3wherein Ln is at least one element selected from the group consisting of La, Ce and Pr, Me is at least one element selected from the group consisting of Nb, Sb and Ta, and x, y, z, a, b and c represent molar ratios, the composition satisfying 0</=x</=0.2, 0<y</=0.1, 0.001</=z</=0.1, 0.93</=a</=1, 0.005</=b</=0.05 and 0.005</=c</=0.05.
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