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空气中微秒脉冲沿面放电对环氧树脂表面特性影响研究

, PP. 158-165

Keywords: 沿面闪络,放电老化,环氧树脂,微秒脉冲,表面特性

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Abstract:

为了获得常压条件下绝缘支撑材料环氧树脂的沿面闪络特性,通过微秒脉冲下连续沿面放电对环氧树脂表面造成老化损伤,获得老化前后的环氧树脂沿面闪络特性数据。在脉冲电压幅值为18kV、频率为100Hz、电极间距为10mm的情况下,对环氧树脂表面进行沿面放电老化处理,对不同放电老化时间下的表面形貌、粗糙度及水接触角进行测量,分析放电对材料表面的老化影响。结果发现,放电老化后环氧树脂表面疏松,且有大量突起颗粒形成,表面极易吸水。此外对老化前后的环氧树脂表面进行闪络实验,结果发现,表面闪络电压随老化时间出现先降低后升高的现象。相关实验结果及分析为研究环氧树脂的沿面耐压性能提供了一定的参数数据。

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