The dielectric properties of two‒phase PVDF‒based composites incorporating Na_0.5Y_0.5Cu₃Ti₄O₁₂ particles were investigated. High-permittivity Na_0.5Y_0.5Cu₃Ti₄O₁₂ filler particles were prepared via a glycine nitrate combustion process. It was found that Na_0.5Y_0.5Cu₃Ti₄O₁₂ particles can increase the proportion of the polar β-PVDF phase in the composites. A Na_0.5Y_0.5Cu₃Ti₄O₁₂/PVDF composite with a volume fraction (f_NYCTO) of 0.5 exhibited significantly increased dielectric permittivity (ε′ ∼ 84) at room temperature and 1 kHz, while a small loss tangent (tanδ ∼ 0.11) was obtained. The increase in ε′ of the Na_0.5Y_0.5Cu₃Ti₄O₁₂/PVDF composites resulted from a high ε′ value of the Na_0.5Y_0.5Cu₃Ti₄O₁₂ filler particles and interfacial polarization. To explain the f_NYCTO-dependence of ε′, theoretical models were used to predict the effective ε′ values at any level of f_NYCTO using experimental ε′ values of the PVDF polymer and Na_0.5Y_0.5Cu₃Ti₄O₁₂ ceramic and tuning the shape-parameter. The variation in ε′ as a function f_NYCTO was well fitted by the Yamada and EMT models.

研究了掺有Na _0.5 Y _0.5 Cu ₃ Ti ₄ O ₁₂颗粒的两相PVDF‒基复合材料的介电性能。通过硝酸甘氨酸燃烧过程制备高介电常数的Na _0.5 Y _0.5 Cu ₃ Ti ₄ O ₁₂填料颗粒。发现Na _0.5 Y _0.5 Cu ₃ Ti ₄ O ₁₂颗粒可以增加复合物中极性β-PVDF相的比例。Na _0.5 Y _0.5 Cu ₃ Ti体积分数（f _NYCTO）为0.5的₄ O ₁₂ / PVDF复合材料在室温和1 kHz下的介电常数（_ε'〜84）显着提高，而损耗角正切值（tanδ〜0.11）却很小。Na _0.5 Y _0.5 Cu ₃ Ti ₄ O ₁₂ / PVDF复合材料的ε'增加是由于Na _0.5 Y _0.5 Cu ₃ Ti ₄ O ₁₂填料颗粒的ε'值高和界面极化引起的。解释f _NYCTOε'的依赖性，使用PVDF聚合物和Na _0.5 Y _0.5 Cu ₃ Ti ₄ O ₁₂陶瓷的实验ε'值并调整形状参数，使用理论模型来预测在f _NYCTO的任何水平下的有效ε'值。在ε'作为函数的变化˚F _NYCTO广受山田和EMT模型拟合。