Abstract We report significantly enhanced dielectric permittivity and suppressed dielectric loss in Na1/2Bi1/2Cu3Ti4O12/poly(vinylidene fluoride) (NBCTO/PVDF) nanocomposites. NBCTO nanoparticles (≈100 nm) synthesized via a chemical combustion method were used as a filler to enhance the dielectric permittivity of PVDF polymer. NBCTO/PVDF nanocomposites with various volume fractions of NBCTO were fabricated using conventional mixed powders and hot pressing. Microstructural analysis revealed good dispersion of NBCTO nanoparticles in the PVDF matrix compared to that of NBCTO micro-particles. The dielectric permittivity of NBCTO/PVDF nanocomposites increased with increasing NBCTO filler content. Interestingly, at 103 Hz, the nanocomposite with 50 vol% of NBCTO exhibited a largely enhanced dielectric permittivity of about 261 and a low dielectric loss of 0.4. Greatly increased dielectric permittivity in the NBCTO/PVDF nanocomposites can be ascribed to large interfacial spaces and short interparticle distances.

中文翻译：

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Na1/2Bi1/2Cu3Ti4O12/聚偏二氟乙烯纳米复合材料显着提高介电常数并抑制介电损耗

摘要 我们报道了 Na1/2Bi1/2Cu3Ti4O12/聚偏二氟乙烯 (NBCTO/PVDF) 纳米复合材料显着增强的介电常数和抑制的介电损耗。通过化学燃烧法合成的 NBCTO 纳米粒子 (≈100 nm) 用作填料以提高 PVDF 聚合物的介电常数。NBCTO/PVDF 纳米复合材料具有不同体积分数的 NBCTO，使用传统的混合粉末和热压制成。微观结构分析表明，与 NBCTO 微粒相比，NBCTO 纳米粒子在 PVDF 基质中具有良好的分散性。NBCTO/PVDF 纳米复合材料的介电常数随着 NBCTO 填料含量的增加而增加。有趣的是，在 103 Hz 时，含有 50 vol% NBCTO 的纳米复合材料的介电常数大大提高，约为 261，介电损耗低至 0.4。NBCTO/PVDF 纳米复合材料中介电常数的显着增加可归因于大的界面空间和短的粒子间距离。