摘要： 针对电子器件对改善传统散热涂层的新需求，优选羟基丙烯酸树脂为成膜物质，以不同粒径的 Si₃N₄与 Al₂O₃ 复配作为功能填料，采用球磨分散工艺制备了绝缘高辐射散热涂层，涂层半球发射率0.91 ，体积电阻率1.93x10¹² Ω·m，热导率 １８５ Ｗ／ （ｍ·Ｋ），具有良好的辐射、传导散热及电气绝缘特性，同时还具有优异的耐水、耐湿热、耐霉菌、耐盐雾及耐老化性能。 研究表明：涂覆绝缘高辐射散热涂层能够使 ＬＥＤ 灯散热器温度显著降低，可提高电子散热器件的使用寿命。

关键词: 散热涂层, 羟基丙烯酸树脂, 高辐射, 绝缘, LED 灯

Abstract: According to the new demand on the traditional heat-dissipating coating for e-lectronic device, an insulating coating with high radiation and heat dissipation has been pre-pared from hydroxyl acrylic resin as film-forming substance and mixture of Si₃N₄  and Al₂0₃with different particle size as functional filler via a ball milling method. The coating shows the hemispherical emissivity 0.91, the volume resistivity 1.93x10¹² Ω·m and the thermal con-ductivity 1. 85 W/(m. K), being characterize by excellent thermal radiation, thermal con-duction, electrical insulation, water resistance, thermal resistance, mildew resistance, salt fog resistance and ageing resistance. The results show that the coating can significantly reduce the temperature of the LED radiator, conducive for improving the service life of the electronic radl-ator.

Key words: heat-dissipating coating hydroxyl acrylic resin, high radiation;insulation: LED