Dielectric properties and relaxation behavior of ZrO2/polyvinylidene fluoride composites
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摘要: 通过熔融法制备了ZrO2/聚偏氟乙烯（PVDF）复合材料，采用SEM、XRD和FTIR对其形貌和结构进行分析，结果表明，ZrO2分布较为均匀，ZrO2/PVDF复合材料主要含α相和少量γ相。采用宽频介电谱（BDS）测试，ZrO2/PVDF复合材料介电常数ε'随ZrO2含量的增加而增加，而介电损耗tanδ保持定值，表明ZrO2的加入可以显著提高ZrO2/PVDF复合材料的介电性能。经计算ZrO2/PVDF复合材料介电模量M″和活化能，发现有玻璃化转变峰、缺陷峰和界面极化峰存在，而加入ZrO2后，ZrO2/PVDF复合材料活化能增加。
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关键词:
- ZrO2 /
- 聚偏氟乙烯(PVDF) /
- 介电性能 /
- 松弛行为 /
- 活化能
Abstract: The ZrO2/polyvinylidene fluoride (PVDF) composites were prepared via melting method. The morphology and structure of ZrO2/PVDF composites were analyzed by SEM, XRD and FTIR. The results show that the ZrO2/PVDF composites with the uniformly distributed ZrO2 are mainly composed of a large number of α phases and a small amount of γ phase. In addition, dielectric constant ε' of ZrO2/PVDF composites increases with the increase of ZrO2 content by dielectric spectroscopy (BDS) and the dielectric loss tanδ value keeps a constant, indicating that the dielectric properties of ZrO2/PVDF composites can be significantly improved by adding ZrO2. By calculating the dielectric modulus M″ and activation energy of ZrO2/PVDF composites, the glass transition peaks, defect peaks and interfacial polarization peaks have been observed. The activation energy of ZrO2/PVDF composite increases with the addition of ZrO2. -
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