Composite polymer dielectrics have strong electrical, mechanical, thermal and environmental properties but experience both high electric fields and harsh environmental conditions as outdoor insulation. The present investigation of the stress-strain characteristics and morphology of the fracture cross-section reveal the risk of a weakly bonded interface between the aluminium hydroxide (ATH) filler and silicone rubber used for insulators in transmission lines and substations. Dielectric response measurements are proposed as a non-destructive probe of the interface quality. An analysis, based on the Dissado–Hill model, indicated that the introduction of ATH interfaces gave rise to a quasi-DC process, in which charge transport is in the form of hopping along the weakly bonded interfaces. A schematic plan is proposed that would allow such an analysis to be used to obtain quantitative information correlated to the status of the weakly bonded interface for the diagnosis of micro-interface quality in ATH-filled silicone rubber and dielectric composites in general.

中文翻译：

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介电响应——一种无损方法来探测室外绝缘用氢氧化铝填充硅橡胶复合材料的微界面

复合聚合物电介质具有很强的电气、机械、热和环境性能，但作为户外绝缘材料，会经历高电场和恶劣的环境条件。目前对应力应变特性和断裂横截面形态的研究揭示了氢氧化铝（ATH）填料和用于输电线路和变电站绝缘子的硅橡胶之间存在弱结合界面的风险。介电响应测量被提议作为界面质量的非破坏性探针。基于 Dissado-Hill 模型的分析表明，ATH 界面的引入产生了准直流过程，其中电荷传输以沿着弱键合界面跳跃的形式进行。