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高温导热绝缘涂料

, PP. 28-32

Keywords: 环氧改性有机硅,热导率,耐高温,电绝缘

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Abstract:

以环氧改性有机硅树脂为基体,氮化硅、氧化铝混合填料为导热粒子制备了导热绝缘涂料。研究了涂料力学性能、热导率、电绝缘性、热稳定性等性能。结果表明:在填料质量分数40%及较佳的氧化铝与氮化硅质量比时,涂层拉伸强度为8.02MPa,断裂延伸率为1.27%,附着力达到572.2N·cm-2,热导率高达1.25W·(m·K)-1,介电常数5.7,体、表电阻率分别为3×1013Ω·cm与4.3×1013Ω,可长期在200℃下使用。与不使用导热填料的环氧改性有机硅树脂涂层相比具有较高的传热能力。

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