采用固相法制备了Ba0.9175Ca0.08Nd0.0025(Zr0.18Ti0.8175-xYxMn0.0025)O3 (BCZT-Y,x=0、0.5mol％、0.75mol％、1.0mol％、1.5mol％、2.0mol％)铁电陶瓷,研究了不同Y3+掺杂量对该铁电陶瓷结构与介电性能的影响.结果表明:随着Y3+掺杂量增加,Y3+进入晶格,BCZT-Y陶瓷的密度从4.029 g/cm3增加到6.058 g/cm3;同时介电峰压低并展宽,居里温度向低温方向移动,表现出明显的铁电体弛豫特征,采用Lorenz型公式对该实验结果进行拟合验证,发现随着Y3+掺杂量增加,电滞回线变窄变斜、回线面积大幅减小,剩余极化强度和矫顽电场降低.
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