CAJ | 학술논문

选用合适粒径的氮化铝和氧化铝为混杂导热填料、使用自制的硅烷低聚物为表面处理剂，以溶液插层法对混杂导热填料进行表面改性；然后与甲基苯基硅油混合制备了LED用低热阻导热硅脂。研究了导热填料的种类、粒径、表面处理剂种类及用量对导热硅脂的热导率和黏度的影响。采用LED灯作为实际测试平台表征了导热硅脂的导热性能。结果表明，当填料总质量分数为90.9%，粒径为5μm的氮化铝与粒径为1μm的氧化铝作混合填料且质量比为2.8：1时，导热硅脂的热导率和黏度有较好的平衡；使用填料质量0.5%的硅烷低聚物对氮化铝和氧化铝混合填料进行表面处理有较好的处理效果；自制10号硅脂样品的黏度（25℃）为174 Pa·s，热阻为1.94℃/W，热导率为4.31 W/m·K。
선용합괄립경적담화려화양화려위혼잡도열전료、사용자제적규완저취물위표면처리제，이용액삽층법대혼잡도열전료진행표면개성；연후여갑기분기규유혼합제비료LED용저열조도열규지。연구료도열전료적충류、립경、표면처리제충류급용량대도열규지적열도솔화점도적영향。채용LED등작위실제측시평태표정료도열규지적도열성능。결과표명，당전료총질량분수위90.9%，립경위5μm적담화려여립경위1μm적양화려작혼합전료차질량비위2.8：1시，도열규지적열도솔화점도유교호적평형；사용전료질량0.5%적규완저취물대담화려화양화려혼합전료진행표면처리유교호적처리효과；자제10호규지양품적점도（25℃）위174 Pa·s，열조위1.94℃/W，열도솔위4.31 W/m·K。
A low thermal resistance grease for LEDs was prepared by mixing hybrid filler with appropriate sizes of AlN/Al2O3 particles as the hybrid thermal conductive fillers and methyl pheny silicone fluid. The hy-brid filler was pre-treated with self-made siloxane oligomers via solution intercalation. Effects of filler’s types, particle sizes and types and content of surface treatment agent on the thermal conductive and viscosity of sili-cone grease were investigated. The thermal conductivity of the thermally conductive silicone grease was charac-terized with LED lamp as an actual platform. Results show that the thermal conductivity and viscosity of ther-mal conductivity silicone grease keeps good balance at a total filler mass fraction of 90 . 9 % with a mass ratio of aluminum nitride(particle size of 5 μm)and alumina(particle size of 1 μm)of 2. 8:1. 0. 5% of siloxane oligomer has good treatment on the surface of mixing fillers of aluminum nitride and alumina. The viscosity of 10# silicone grease(25 ℃)is 174 Pa·s,with 1. 94 ℃/W of thermal resistance and 4. 31 W/m·K of thermal conductivity.