采用脉冲激光沉积法制备了四个组分的高温压电薄膜xBiInO3-(1-x)PbTiO3(xBI-PT).X射线衍射谱显示,四个样品均呈(001)取向的单相钙钛矿结构特征.随着x的增大,xBI-PT样品中(111)相对取向率逐步增加.0.20BI-PT样品相对于0.15BI-PT样品,其剩余极化(Pr)略有增加的同时,矫顽场(Ec)也增大;0.25BI-PT的Pr相对于0.15BI-PT略有减小.在～700 kV/cm外场下,0.15BI-PT的Pr和Ec分别为～24 μC/cm2和～93 kV/cm; 0.20BI-PT的Pr和Ec分别为～28 μC/cm2和～125 kV/cm.随着x的增加,样品的居里温度(Tc)逐渐升高,样品0.25BI-PT的Tc高达621℃.0.15BI-PT样品中外在因素对介电非线性的贡献要大于0.20BI-PT和0.25BI-PT样品.这与材料中晶粒的(111)相对取向率有关.
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