Effects of filler composition, loading, and geometry on the dielectric loss, partial discharge, and dielectric strength of liquid metal polymer composites
Effects of filler composition, loading, and geometry on the dielectric loss, partial discharge, and dielectric strength of liquid metal polymer composites
复制标题
DOI：
10.1016/j.compositesb.2022.109686
复制
发表时间：
2022-02-01
影响因子：
13.1
通讯作者：
Park, Chanyeop
中科院分区：
文献类型：
--
作者：
Calabrese, Robert E.;Bury, Elizabeth;Park, Chanyeop
为了设计具有所需电气和机械性能的液态金属聚合物复合材料（LMPC），同时防止介电过早老化和失效，研究了含有伽林斯坦（GaInSn）、钛酸钡（BTO）、铁（Fe）及其混合物的LMPC的介电击穿特性。研究了介电性能，包括介电损耗（tan 8）、局部放电起始电场（PDIE）和击穿电场（Ebd）。根据该研究，具有较高总填料浓度的 LMPC 往往表现出较高的 tan 8、较低的 PDIE 和较低的 Ebd。该研究还表明，即使填料浓度保持不变，这些介电性能也会因填料类型而异。这是由于不同的填料电导率、介电常数和几何形状导致复合材料内电场分布的差异。为了进一步了解观察到的实验结果，开发并分析了有限元分析 (FEA) 模型。
With the goal of enabling the design of liquid metal polymer composites (LMPCs) with desired electrical and mechanical properties while preventing premature dielectric aging and failure, the dielectric breakdown char-acteristics of LMPCs containing galinstan (GaInSn), barium titanate (BTO), iron (Fe), and mixtures thereof are investigated. The dielectric properties including dielectric loss (tan 8), partial discharge inception electric field (PDIE), and breakdown electric field (Ebd) are investigated. According to the study, LMPCs with a higher overall filler concentration tend to show higher tan 8, lower PDIE, and lower Ebd. The study also demonstrates that these dielectric properties vary by the type of filler even with an equally maintained filler concentration. This is due to the distinct filler conductivity, permittivity, and geometry that cause differences in the electric field distribution within the composites. To provide further insights into the observed experimental results, finite element analysis (FEA) models were developed and analyzed.