Epoxy resin filled with micron alumina (micro‐Al₂O₃/ER) has been widely used in the manufacture of basin insulators for its excellent mechanical and thermal properties. However, charge dissipation properties of micro‐Al₂O₃/ER are too poor to ensure its surface insulation on strength under long‐term action of a DC electric field. In this paper, the modification method of plasma cohydrothermal fluorination of filler was proposed to improve its surface charge dissipation performance. The surface morphology and the element content of Al₂O₃ were observed, and the flashover voltage and charge characteristics of different composites were tested. Finally, the trap distribution was calculated by isothermal current attenuation method. Self‐comparison analysis with single‐step modification of plasma treatment shows that the cofluorination method has a high graft rate of fluorine element and an ideal modification effect on surface insulation, with its technical means convenient to be applied in the insulator manufacturing industry.

中文翻译：

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填料的等离子体共水热氟化处理提高了微米级氧化铝/环氧复合材料的表面绝缘性

填充有微米级氧化铝（micro-Al ₂ O ₃ / ER）的环氧树脂因其优异的机械和热性能而被广泛用于盆式绝缘子的制造。但是，micro-Al ₂ O ₃ / ER的电荷耗散性能太差，无法在直流电场的长期作用下确保其表面绝缘强度。提出了等离子体等离子体共氢氟化填料的改性方法，以提高填料的表面电荷耗散性能。Al ₂ O ₃的表面形貌和元素含量观察，并测试了不同复合材料的飞弧电压和充电特性。最后，通过等温电流衰减法计算了陷阱分布。通过对等离子处理进行单步改性的自比较分析表明，共氟化方法具有较高的氟元素接枝率，并且对表面绝缘具有理想的改性效果，其技术手段便于在绝缘子制造行业中应用。