Abstract Plate-like (Ba0.6Sr0.4)TiO3 (P-BST) particles were synthesized via topochemical microcrystal conversion using a two-step molten salt method. In addition, P-BST/poly(vinylidene fluoride) (PVDF) textured composites were fabricated using a tape casting and hot pressing method. The influence of the P-BST particle size on the microstructure, dielectric tunability, and energy storage properties of the P-BST/PVDF textured composites was investigated. The results revealed that P-BST/PVDF textured composites can be obtained with preferred orientation of plate-like particles, which exhibit uniform directionality in the PVDF matrix. The dielectric properties of these composites increased with increasing P-BST particle size. A new criterion EP80 was proposed for evaluating the dielectric tunability of composites. The optimal properties of the P-BST/PVDF textured composite (minimum threshold electric field: 14 kV/mm, minimum EP80: 29 kV/mm, and maximum energy storage density: 6.36 J/cm3) were realized at a P-BST particle size of 11.47 μm. A dielectric tunability model for inorganic/organic composites with respect to the shape factor (n) of the inorganic fillers was proposed and used to simulate the dielectric tunability of the textured composites. For the P-BST/PVDF composite, n of 4–5 in the model corresponded to P-BST particle sizes of 5.19 μm–11.47 μm.

中文翻译：

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通过织构排列增强板状 Ba 0.6 Sr 0.4 TiO 3 /聚偏二氟乙烯复合材料的介电可调性和储能性能

摘要 采用两步熔盐法通过拓扑化学微晶转化合成了板状 (Ba0.6Sr0.4)TiO3 (P-BST) 颗粒。此外，P-BST/聚偏二氟乙烯（PVDF）织构复合材料是使用流延和热压方法制造的。研究了 P-BST 粒径对 P-BST/PVDF 织构复合材料的微观结构、介电可调性和储能性能的影响。结果表明，P-BST/PVDF 纹理复合材料可以通过板状颗粒的择优取向获得，在 PVDF 基体中表现出均匀的方向性。这些复合材料的介电性能随着 P-BST 粒径的增加而增加。提出了用于评估复合材料介电可调性的新标准 EP80。P-BST/PVDF 织构复合材料的最佳性能（最小阈值电场：14 kV/mm，最小 EP80：29 kV/mm，最大储能密度：6.36 J/cm3）是在 P-BST 颗粒上实现的尺寸为 11.47 微米。提出了一种关于无机填料形状因子 (n) 的无机/有机复合材料的介电可调性模型，并用于模拟织构复合材料的介电可调性。对于 P-BST/PVDF 复合材料，模型中 4-5 的 n 对应于 5.19 μm-11.47 μm 的 P-BST 粒径。提出了一种关于无机填料形状因子 (n) 的无机/有机复合材料的介电可调性模型，并用于模拟织构复合材料的介电可调性。对于 P-BST/PVDF 复合材料，模型中 4-5 的 n 对应于 5.19 μm-11.47 μm 的 P-BST 粒径。提出了一种关于无机填料形状因子 (n) 的无机/有机复合材料的介电可调性模型，并用于模拟织构复合材料的介电可调性。对于 P-BST/PVDF 复合材料，模型中 4-5 的 n 对应于 5.19 μm-11.47 μm 的 P-BST 粒径。