二氧化锆/聚偏氟乙烯复合材料介电性能及松弛行为

《复合材料学报》优先在线发表论文。

摘  要：通过熔融法制备了二氧化锆(ZrO2)/聚偏氟乙烯(PVDF)纳米复合材料，采用扫描电镜(SEM)、X射线衍射仪(XRD)和傅里叶变换红外光谱仪(FTIR)对其形貌和结构进行分析，结果表明，ZrO2分布较为均匀，复合材料主要含α相和少量γ相。采用宽频介电谱(BDS)测试，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值保持定值，这表明ZrO2的加入可以显著提高复合材料的介电性能。经计算介电模量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，复合材料活化能增加。

关键词：二氧化锆；聚偏氟乙烯；介电性能；松弛行为；活化能

Abstract: Zirconium dioxide (ZrO2)/polyvinylidene fluoride(PVDF) nanocomposites were prepared via melting method. The morphology and structure of the nanocomposites were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The results show that the nanocomposites 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 the composites increase 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 the composites can be significantly improved by adding ZrO2. By calculating the dielectric modulus M" and activation energy, the glass transition peaks, defect peaks and interfacial polarization peaks were observed. The activation energy of the composite increased with the addition of ZrO2.

Keywords: zirconium dioxide; polyvinylidene fluoride; dielectric properties; relaxation behavior; activation energy

作者：童婷等，陕西理工大学 材料科学与工程学院，汉中

通讯作者：童婷，陕西理工大学 材料科学与工程学院，汉中

全文详见中国知网学术期刊优先数字出版。