高导热高绝缘导热硅脂的制备及性能表征  

Preparation and Characterization of Silicone Grease with High Thermal Conductivity and High Electrical Insulation

作　　者：崔巍[1] 祝渊[1] 袁轩一[1] 周和平[1] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2011年第S1期443-446,共4页Rare Metal Materials and Engineering

基　　金：国家"863"计划项目(2009AA03Z211)

摘　　要：高导热硅脂作为一种热界面材料,可以显著地减小因接触空隙而产生的热阻,提高散热效果。通过采用自制的氮化硅、氮化铝、氧化铝等陶瓷粉体来代替传统的金属粉体作为导热填料,制备出高绝缘高导热的导热硅脂。研究了陶瓷粉体种类、添加量以及表面改性剂对导热硅脂热导率的影响规律。采用热阻测试仪、AMD、Inter主板测试平台、耐压测试仪等表征了导热硅脂的导热和绝缘性能。并对实验结果进行了理论分析。Thermal grease, as a thermal interface material, reduces the thermal resistance significantly between heat resource and heat sink which is filled with air gap. This article makes use of silicon nitride, aluminum nitride, alumina and other ceramic powders which produced at our laboratory to replace traditional metal powder as conductive filler. The thermal grease prepared by this method has high electrical insulation and high thermal conductivity. The effect of different types of ceramic powder, solid content of composite materials and the powder surface modification on thermal conductivity of the thermal grease were investigated. Thermal conductivity and electrical insulation properties of thermal grease were characterized by the thermal resistance tester, AMD& Inter motherboard test platform, withstanding voltage tester. The experimental results are analysed by theory.

关 键 词：导热硅脂 陶瓷粉体 热导率 绝缘 表面改性 

分 类 号：TB34[一般工业技术—材料科学与工程]