The dielectric and percolation behavior of polymer nanocomposites (PNC) comprising of polyvinylidene fluoride (PVDF)/nanocrystalline nickel (n-Ni) [conducting filler] and PVDF/n-BaTiO₃ [ferroelectric insulating filler], prepared under the novel cold press method are compared. Higher effective dielectric constants (ɛ_eff) of 2400 and 400 at 40 Hz with volume fractions of filler f_con = 0.28 and \(f_{{{\text{BaTiO}}_{3} }} = 0.60\) were observed, respectively. PVDF/n-Ni composites show percolation behavior associated with insulator to metal transition (IMT) at the percolation threshold (f_c), while PVDF/n-BaTiO₃ shows an effective electrical behavior due to the sum effect without showing any IMT. The drastic modulation in their dielectric, electrical and percolation behavior are attributed to the nature of filler present in them and has been explained by Percolation theory, Yamada model and VRH models. The universality and non-universality of exponents have been understood within the framework of the above models, the geometry of the fillers and the process conditions. Cold-pressed PNC based on ferroelectric filler are of superior quality for dielectric applications.

新型冷压法制备的聚偏二氟乙烯（PVDF）/纳米晶镍（n- Ni）[导电填料]和PVDF / n- BaTiO ₃ [铁电绝缘填料]组成的聚合物纳米复合材料（PNC）的介电和渗透行为比较。较高的有效介电常数（ɛ _EFF的2400和400），在40赫兹，填料体积分数˚F _CON  = 0.28和\（F _ {{{\文本{的BaTiO}} _ {3}}} = 0.60 \）进行观察，分别。PVDF / n -Ni复合材料在渗透阈值（f _c），而PVDF / n -BaTiO ₃由于求和效应而显示出有效的电行为，而没有显示任何IMT。它们的介电，电和渗透行为的剧烈调制归因于它们中存在的填料的性质，并且已经由渗透理论，Yamada模型和VRH模型进行了解释。在上述模型，填料的几何形状和工艺条件的框架内，已经了解了指数的通用性和非通用性。基于铁电填料的冷压PNC在电介质应用中具有卓越的品质。