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首页> 外文会议>Electrical Insulation and Dielectric Phenomena (CEIDP), 2011 Annual Report Conference on >Dielectric breakdown of an epoxy/quartz composite and a nanostructured epoxy/quartz/Montmorillonite composite. Influence of electrode geometry
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Dielectric breakdown of an epoxy/quartz composite and a nanostructured epoxy/quartz/Montmorillonite composite. Influence of electrode geometry

机译：环氧树脂/石英复合材料和纳米结构的环氧树脂/石英/蒙脱土复合材料的介电击穿。电极几何形状的影响

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摘要

Microcomposites epoxies are widely used as high voltage insulation. A new way to improve such materials is to add nanoparticles to the epoxy matrix, thus forming a nanostructured microcomposite. For this study, epoxy composites films filled with 60 % wt of quartz microparticles were prepared, reinforced or not by 0.45% wt of organically modified Montmorillonite C30B. The dielectric breakdown strength of the samples was studied using two types of electrode and the statistical analysis of the breakdown data was performed using the Weibull distribution. The use of different electrode geometries implied a different distribution of the electrical field magnitude both in the dielectric sample and in the surrounding medium. Rigid films with a typical thickness of 1 mm are set between electrodes embedded in oil and AC voltage was increased at a constant rate until breakdown occurs. No significant difference was found in the breakdown data for microcomposites and nanostructured composites. The use of a more uniform electrical field decreases slightly the measured dielectric breakdown strength. The shape factor associated with the distribution dispersion is unchanged for both studied cases, but very low compared to classical industrial materials. Finally, the thus obtained results warrant the use of smaller-area samples if non-uniform field conditions are used.
机译：微复合环氧树脂被广泛用作高压绝缘。改善此类材料的新方法是将纳米颗粒添加到环氧基质中，从而形成纳米结构的微复合材料。对于本研究，制备了填充有60％wt的石英微粒的环氧复合材料膜，是否用0.45％wt的有机改性蒙脱土C30B增强了该复合膜。使用两种类型的电极研究了样品的介电击穿强度，并使用威布尔分布对击穿数据进行了统计分析。使用不同的电极几何形状意味着电介质样品和周围介质中电场强度的不同分布。在埋入油中的电极之间设置典型厚度为1 mm的硬质膜，并以恒定速率增加AC电压，直到发生击穿为止。在微复合材料和纳米结构复合材料的击穿数据中未发现显着差异。使用更均匀的电场会稍微降低测得的介电击穿强度。与分布色散相关的形状因子在两种情况下均未改变，但与传统工业材料相比非常低。最后，如果使用了不均匀的野外条件，则由此获得的结果可保证使用较小面积的样本。

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