Abstract In order to accurately evaluate the service life and failure mechanism of the PZT piezoelectric ceramics, the electric degradation process of the PZT ceramics with and sans doping under a DC voltage of 380V, in a surrounding environment of 90∘C and 85% RH has been investigated using a self-made device. The experimental results show that the degradation rate of the pure PZT ceramic is lower than that of ceramics with doping in the same condition. Furthermore, the electrical properties of the ceramics tend to decrease during the electric degradation. The doping increases the defects of ceramics, resulting in that the silver ion transfer from the anode to the cathode under the continuous DC bias, which can further form a metal band, increasing the conductivity, but deteriorating the service life.

中文翻译：

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直流偏压下 PZT 压电陶瓷的电退化

摘要 为了准确评价 PZT 压电陶瓷的使用寿命和失效机理，在 380V 直流电压、90∘C 和 85% RH 的周围环境中，PZT 陶瓷的电降解过程具有使用自制设备进行了调查。实验结果表明，在相同条件下，纯PZT陶瓷的降解率低于掺杂的陶瓷。此外，陶瓷的电性能在电退化过程中趋于降低。掺杂增加了陶瓷的缺陷，导致银离子在连续的直流偏压下从阳极转移到阴极，进一步形成金属带，增加了导电性，但降低了使用寿命。