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PMnS-PZN-PZT压电纤维的制备与铁电性能

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Abstract:

采用固相法制备了0.8Pb(Mn1/3Sb2/3)0.05(Zr1/2Ti1/2)0.95O3–0.2Pb(Zn1/3Nb2/3)0.28(Zr1/2Ti1/2)0.72O3(PMnS–PZN–PZT)粉末,然后用塑性聚合物方法制备了PMnS–PZN–PZT压电纤维。研究了纤维夹持状态对其铁电性能的影响。结果表明塑性聚合物法制备的PMnS–PZN–PZT压电纤维具有良好的铁电性能,压电纤维处于自由状态时,剩余极化强度和矫顽场分别为85.4μC/cm2和8.5kV/cm,但电滞回线很难饱和。将纤维采用环氧树脂固化后,剩余极化强度变成39.2μC/cm2,电滞回线呈饱和状态,说明夹持状态对纤维的铁电性能产生很大的影响。高压下压电纤维浇铸前后的漏电流测试结果表明,压电纤维浇铸后剩余极化强度变小主要与漏电流有关。

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