| 摘要 |
<p>A piezoelectric ceramic composition including potassium-sodium-lithium niobate, bismuth-sodium titanate and bismuth ferrate is provided. A piezoelectric ceramic obtained by firing the piezoelectric ceramic composition, wherein the electromechanical coupling factor is high, the piezoelectric g 33 constant, in particular, is large, the second phase transformation does not exist in the temperature range of -40 to 150°C in at least one of a temperature-dependent variation of a resonance frequency, a temperature-dependent variation of an anti-resonance frequency and a temperature-dependent variation of piezoelectric g 33 constant, and a good heat-resistant property is obtained, is provided.</p> |
