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陶瓷型铁电复合物厚片介电系数的电场依赖性

, PP. 63-68

Keywords: PZT/P,(VDF-TrFE),PT/P,(VDF-TrFE),铁电复合物,介电系数,电场依赖性

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Abstract:

建立起高压介电测试装置和相应的数据处理方法。研究了PZT/P(VDF-TrFE)和PT/P(VDF-rFE)0-3型铁电复合物厚片介电系数的电场依赖性。对于陶瓷体积分数U>0.3的复合物,介电系数随测试场强的升高明显增大。在U<0.1时,可用Maxwell-Garnett方程拟合试验结果。Bruggeman方程适合于低电场(<1MV/m)下复合物介电系数的预测。通过Lz的变化,用Yamada模型可拟合复合物介电系数随电场变化的关系,说明Lz是由复合物的组分维数、粒子形状以及粒子间静电相互作用所决定的参数。

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