Alumina/epoxy composites are widely used in the manufacture of basin insulators, but their surfaces tend to accumulate charges under the high‐voltage direct current (HVDC), which induce the decline of surface insulating property. In this article, the modification method of depositing ZrO₂ film sprayed by plasma atomization was proposed to improve the surface insulation performance of the material. Argon was used as the plasma discharge gas, and ZrO (NO₃)₂.xH₂O was used as the zirconium source. The morphology, surface roughness and the element content of materials were measured, and the surface conductivity, flashover voltage, and charge characteristics of the treated samples were tested. The experimental results displayed that a zirconia film was formed on the epoxy resin surface, which restrain the accumulation of surface charges. The surface conductivity of the modified sample was improved by 3 to 4 orders of magnitude, and the flashover voltage was increased by 20%. Studies have shown that: ZrO₂ film sprayed by plasma atomization can improve the insulation performance of epoxy resin surface, and it provides an effective method for the surface modification of insulating materials.

中文翻译：

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通过等离子雾化喷涂的ZrO2薄膜增强氧化铝/环氧树脂复合材料的表面绝缘性能

氧化铝/环氧树脂复合材料广泛用于盆形绝缘子的制造中，但是它们的表面往往会在高压直流电（HVDC）下积累电荷，这会导致表面绝缘性能下降。本文提出了一种通过等离子体雾化沉积ZrO ₂薄膜的改性方法，以提高材料的表面绝缘性能。氩气用作等离子体放电气体，ZrO（NO ₃）₂用作等离子体放电气体。X ħ ₂O用作锆源。测量材料的形貌，表面粗糙度和元素含量，并测试处理过的样品的表面电导率，飞弧电压和电荷特性。实验结果表明，在环氧树脂表面形成了氧化锆膜，抑制了表面电荷的积累。改性样品的表面电导率提高了3到4个数量级，闪络电压提高了20％。研究表明：等离子雾化喷涂的ZrO ₂薄膜可以提高环氧树脂表面的绝缘性能，为绝缘材料的表面改性提供了一种有效的方法。