利用改进的固相烧结工艺设计和制备出一种具有高介电常数、高压电系数的PLZT陶瓷材料.研究了Sb2O3、BaTiO3的不同掺杂量对PLZT陶瓷的介电性能和压电性能的影响.实验发现,当Sb2O3和BaTiO3含量的质量百分比均为0.5%时,PLZT陶瓷的介电性能、压电性能较佳,相应的物理参数为:频率为1kHz时室温相对介电常数εr=4500,压电常数d33=640pC/N,压电耦合系数kp=0.7,密度ρv=7.914g/cm3,居里温度Tc=213℃,介电损耗tgδ=0.0175.该材料在叠层电容器、压电陶瓷固体继电器、压电驱动器及压电电声器件等方面具有良好的应用前景.
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