温度对PLZT铁电陶瓷电疲劳性能的影响

Effect of Temperature on Electric Fatigue Behaviour of PLZT Ferroelectric Ceramics

摘要:

利用常规方法制备了Pb0.97(La,Nb)0.03Zr0.53Ti0.47O3铁电陶瓷,研究了温度对Pb0.97(La,Nb)0.03Zr0.53Ti0.47O3铁电陶瓷电疲劳性能的影响。结果表明,温度对PLZT铁电陶瓷电疲劳性能影响很大,随着温度的升高,电疲劳速率降低。样品的介电温谱及断口SEM分析表明铁电陶瓷电疲劳机制主要为畴钉扎机制和内应力集中造成沿晶微裂纹。

Abstract:

The effect of temperature on electric fatigue of PLZT ferroelectric ceramics were studied in this paper. The research results show that the effect of temperature on electric fatigue behaviour of PLZT is significant, the higher the temperature is, the slower the fatigue velocity. The results of temperature dependence of the dielectric constant and microstructure observation by SEM shows that fatigue mechanism was mainly domain wall pining and intergranular microcracking initated by the internal stress concentration.