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首页> 外文期刊>Journal of Materials Science >The effect of processing conditions on the morphology, thermomechanical, dielectric, and piezoelectric properties of P(VDF-TrFE)/BaTiO _3 composites
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The effect of processing conditions on the morphology, thermomechanical, dielectric, and piezoelectric properties of P(VDF-TrFE)/BaTiO _3 composites

机译：加工条件对P（VDF-TrFE）/ BaTiO _3复合材料的形貌，热机械，介电和压电性能的影响

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摘要

In this study (0-3) P(VDF-TrFE)/BaTiO _3 composites containing up to 60 vol% of ceramic phase were prepared by solvent casting or compression molding. Their thermomechanical, dielectric, and piezoelectric properties were investigated, and discussed in the light of the properties of the basic components, the processing route and the resulting morphology. The crystalline structure of the P(VDF-TrFE) matrix was found to be highly dependent on the processing route, while the structure of BaTiO3 was not affected by any of the processing steps. The mechanical properties of the solvent cast materials showed a maximum at 30 vol% BaTiO _3, while they increased monotonically with BaTiO _3 content for compression molded materials. This difference was attributed to a higher amount of porosity and inhomogeneities in the solvent cast composites. Permittivity as high as 120 and piezoelectric coefficient d _(33) up to 32 pC/N were obtained for compression molded composites, and the observed decrease in d _(33) with aging time was attributed to the effect of mechanical stress release in the polymer matrix.
机译：在本研究中，通过溶剂浇铸或压铸法制备了陶瓷相含量高达60％（体积）的P（VDF-TrFE）/ BaTiO_3复合材料。对它们的热机械，介电和压电性能进行了研究，并根据基本组分的性能，加工路线和所得形态进行了讨论。发现P（VDF-TrFE）基体的晶体结构高度依赖于加工路线，而BaTiO3的结构不受任何加工步骤的影响。溶剂铸造材料的机械性能在30％（体积）BaTiO_3处显示最大值，而对于压模材料，其力学性能随BaTiO_3含量单调增加。这种差异归因于溶剂浇铸复合材料中较高的孔隙率和不均匀性。压缩成型的复合材料的介电常数高达120，压电系数d _（33）高达32 pC / N，观察到的d _（33）随老化时间的降低是由于机械应力释放引起的。聚合物基质。

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