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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Piezoelectric and pyroelectric properties of PZT/P(VDF-TrFE) composites with constituent phases poled in parallel or antiparallel directions
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Piezoelectric and pyroelectric properties of PZT/P(VDF-TrFE) composites with constituent phases poled in parallel or antiparallel directions

机译：组成相平行或反平行极化的PZT / P（VD​​F-TrFE）复合材料的压电和热电性质

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摘要

Composites of lead zirconate titanate (PZT) powder dispersed in a vinylidene fluoride-trifluoroethylene copolymer [P(VDF-TrFE)] matrix have been prepared by compression molding. Three groups of polarized samples have been prepared by poling: only the ceramic phase, the ceramic and polymer phases in parallel directions, and the two phases in antiparallel directions. The measured permittivities of the unpoled composites are consistent with the predictions of the Bruggeman model. The changes in the pyroelectric and piezoelectric coefficients of the poled composites with increasing ceramic volume fraction can be described by modified linear mixture rules. When the ceramic and copolymer phases are poled in the same direction, their pyroelectric activities reinforce while their piezoelectric activities partially cancel. However, when the ceramic and copolymer phases are poled in opposite directions, their piezoelectric activities reinforce while their pyroelectric activities partially cancel.
机译：通过压缩成型制备了分散在偏二氟乙烯-三氟乙烯共聚物[P（VDF-TrFE）]基体中的锆钛酸铅（PZT）粉末的复合材料。通过极化制备了三组极化样品：仅陶瓷相，平行方向的陶瓷和聚合物相以及反平行方向的两相。未极化复合材料的测量介电常数与Bruggeman模型的预测一致。极化复合材料的热电和压电系数随陶瓷体积分数的增加而变化，可以通过修正的线性混合规则来描述。当陶瓷相和共聚物相以相同方向极化时，它们的热电活性会增强，而其压电活性会部分抵消。但是，当陶瓷相和共聚物相以相反的方向极化时，它们的压电活性会增强，而其热电活性会部分抵消。

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