Piezoelectric ceramics are often subjected to heavy loading. Piezoceramic sheets are essential elements of piezoelectric devices. The vibration amplitudes and static capacitances of PZT5 soft piezoelectric discs with Φ10 × 1mm³ and PZT4 hard piezoelectric sheets with 7 × 7 × 0.7mm³ under compressive stress are studied. The experimental results show that the piezoelectric properties of PZT5 are improved within 200 MPa, and PZT4 can withstand stress up to 500 MPa without depolarization. The capacitances of both piezoceramics decrease linearly with increasing compressive stress. And the PZT4 ceramics have the potential of improving work capability significantly under high compressive stress.

压电陶瓷经常承受重负荷。压电陶瓷片是压电器件的基本元件。研究了Φ10×1mm ³的PZT5软压电片和7×7×0.7mm ^3的PZT4硬压电片在压缩应力下的振动幅度和静电容。实验结果表明，PZT5的压电性能在200 MPa以内得到了改善，PZT4可以承受500 MPa的应力而不会去极化。两种压电陶瓷的电容都随着压缩应力的增加而线性减小。而且PZT4陶瓷具有在高压缩应力下显着提高工作能力的潜力。