Flexible dielectric polymer nanocomposites (NCs) with high dielectric permittivity and low loss factor have numerous applications in light emitting and storage devices. In this research work, polymer based NCs in the form of flexible sheets containing 5% ZnO and 15, 20% SiO₂ nano-fillers, are synthesized by using co-precipitation method. X-ray diffraction analysis reveals the development of various diffraction planes related to ZnO and SiO₂ phases confirms the synthesis of polycrystalline PB–ZnO–SiO₂ NCs flexible sheets corresponding to various compositions. Morphology and compositional analysis show the uniform distribution of nanoparticles in polymer matrix with estimated elemental contents in each composition. Dielectric measurements demonstrate a sharp increase in dielectric permittivity with relatively low dissipation factor in synthesized compositions having ZnO and SiO₂ nano-fillers. The static value of dielectric constant at 100 Hz is found to be 10.79 for sample having 20% SiO₂ nano-fillers that is 3.4 times greater than pure PVA and it shows relatively low value of dissipation factor. The observed AC conductivity of synthesized NCs flexible sheets having 5% ZnO, 20% SiO₂ nano-fillers is 2.15 × 10^–5 S/m that is 3.3 times greater than pure PVA at 1 × 10⁶ Hz. Complex impedance spectroscopy further confirms, these materials as promising candidates for better capacitive performance.

具有高介电常数和低损耗因子的柔性介电聚合物纳米复合材料（NCs）在发光和存储设备中具有众多应用。在这项研究工作中，采用共沉淀法合成了含5％ZnO和15、20％SiO ₂纳米填料的柔性片形式的聚合物基NCs 。X射线衍射分析揭示了与ZnO和SiO ₂相有关的各种衍射平面的发展，证实了多晶PB–ZnO–SiO ₂的合成NCs柔性片材对应于各种成分。形态学和组成分析表明，纳米颗粒在聚合物基质中的分布均匀，每种组分中的元素含量均估计。介电测量结果表明，在具有ZnO和SiO ₂纳米填料的合成合成物中，介电常数急剧增加，而损耗因子却相对较低。对于具有20％SiO ₂纳米填料的样品，在100 Hz时的介电常数静态值为10.79 ，是纯PVA的3.4倍，并且耗散因子值相对较低。合成的含5％ZnO，20％SiO ₂纳米填料的NCs柔性板的交流电导率为2.15×10 ^–5 S / m在1×10 ⁶  Hz时是纯PVA的3.3倍。复数阻抗谱进一步证实，这些材料有望成为具有更好电容性能的候选材料。