中文摘要：

常温常压下,采用CO2激光辐照带有电极的PZT-4陶瓷片,当激光辐照时间分别为2、5和10 s时,在适当的激光功率密度下可使其压电应变常数d33从380 pC/N下降为零。系统地研究了激光功率密度和激光辐照时间对PZT-4陶瓷压电性能影响的规律。XRD、拉曼光谱和退火实验结果表明：CO2激光辐照使d33下降为零的原因是由于激光热效应导致PZT-4陶瓷的电畴排列失序,极化状态消失;而激光辐照未使其物相发生变化。

英文摘要：

The piezoelectric strain constant d33 of PZT-4 ceramics with electrode can drop from 380 pC/N to 0 by CO2 laser irradiation under suitable laser power density when the irradiation time is 2 s,5 s and 10 s at normal temperature and pressure.The relationships between d33 of PZT-4 ceramics and laser power density and laser irradiation time are investigated systematically.Based upon the characterization of XRD,Raman spectra and traditional annealing treatment,it is suggested the electric domains of irradiated PZT-4 ceramics become unordered and polarized state degenerated by thermal effect of CO2 laser irradiation,which causes its piezoelectric properties vanish with phase unchanged.