Dielectric behaviour of thin films of beta-PVDF/PZT and beta-PVDF/BaTiO3 composites
Dielectric behaviour of thin films of beta-PVDF/PZT and beta-PVDF/BaTiO3 composites
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DOI：
10.1007/bf00356003
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发表时间：
1996-06-01
影响因子：
4.5
通讯作者：
Bernardino, FE
中科院分区：
文献类型：
--
作者：
Gregorio, R;Cestari, M;Bernardino, FE
在聚偏氟乙烯（PVDF）和钛酸锆铅（PZT）以及钛酸钡之间形成了0-3连接的复合薄膜，并将陶瓷粉末分散在PVDF -二甲乙酰胺DMA溶液中。溶剂在65℃下蒸发，使PVDF主要在极性β相结晶，而PZT或BaTiO3粉末的添加量较少，最高可达40 vol%。在100 Hz ~ 13 MHz的频率范围内，测定了纯组分和不同陶瓷含量的复合材料的相对介电常数和损耗指数。PZT或BaTiO3含量的增加导致复合材料的相对介电常数增加，实验结果与Yamada et al.[1]的理论表达式计算结果吻合较好。测定了不同组分复合材料的导电性能。
Thin films of the composites formed between poly(vinylidene fluoride) (PVDF) and lead zirconium titanate (PZT) and also barium titanate with 0-3 connectivity, have been obtained by dispersion of the ceramic powder in a solution of PVDF in dimethylacetamide DMA. Evaporation of the solvent at 65 degrees C allowed crystallization of PVDF predominantly in the polar beta phase, regard less of the amount of PZT or BaTiO3 powder added upto 40 vol%. The relative permittivity and loss index values were determined for the pure components and for the composites with different ceramic contents, in the frequency range of 100 Hz to 13 MHz. An increase in PZT or BaTiO3 content resulted in an increase in the relative permittivity of the composites, and the experimental results are shown to be in good agreement with those calculated from the theoretical expression of Yamada et al. [1]. The de electrical conductivity of composites with different compositions was also determined.