钛含量对温度梯度PZT铁电体电极化特性的影响

材料科学与工程学报, 2010, 28(6): 926-929.

钛含量对温度梯度PZT铁电体电极化特性的影响

刘虹让 ^1, , 王英龙 ^2, , 王兴远 ^3, , 丁学成 ^4, , 梁伟华 ^5, , 刘保亭 ^6,

1.河北大学,物理科学与技术学院,河北,保定,071002

2.河北大学,物理科学与技术学院,河北,保定,071002

3.河北大学,物理科学与技术学院,河北,保定,071002

4.河北大学,物理科学与技术学院,河北,保定,071002

5.河北大学,物理科学与技术学院,河北,保定,071002

6.河北大学,物理科学与技术学院,河北,保定,071002

基金项目: 国家自然科学基金(50572021;10774036) 河北省自然科学基金(E2005000130;E2008000631) 973前期研究专项资助项目(2007CB616910) 河北大学科研基金(Y2007100)

关键词：极化强度 , 梯度变化 , 温度 , PZT

Effect of Ti Content on the Characteristic of Electric Polarization for Temperature-graded PZT Ferroelectric

根据Landau-Devonshire自由能理论,研究了当温度呈梯度变化时,不同钛含量的PZT铁电体的电极化特性.结果表明,当温度呈正(负)梯度变化时,极化强度沿轴向单调递减(增);极化强度变化程度随钛组分的增多而减小.计算了当温度变化量一定时,PZT50/50、40/60、20/80和PbTiO3铁电体的单位面积电荷偏移量,拟合结果显示,钛组分的增加,将导致电荷偏移量数值的逐渐减小.

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