发光学报Issue(12)：1469-1476,8.DOI:10.3788/fgxb20153612.1469
BN & Al2 O3/环氧树脂复合材料粘接层对LED灯结温的影响
Effects of BN & Al2 O3/Epoxy Composites Adhesive Layer on Junction Temperature of LED
摘要
Abstract
Homemade BN/EP composites and Al2 O3/EP composites were used as the adhesive layer between PCB and the heat sink of LED, respectively. The temperature distribution of LED working in the normal condition was measured by high-precision thermometers through a small hole. The effect of the adhesive layer composites on the junction temperature of LED was discussed, and was compared with the results from COMSOL simulations. A similar variation trend of junction tempera-ture of LED was observed in both our experiment and COMSOL simulation. The junction temperature of LED raised with the increment of thickness of the adhesive layer. Besides, along with the incre-ment of thermal conductivity of the adhesive layer composites, the junction temperature declined sharply at first, and then gradually decreased to a flat level. At last, we obtained two optimum val-ues of the thickness and the ratio of adhesive layer composites with the best performance. When the mass fraction of BN is 60%, the thermal conductivity of BN/EP composites reaches at the highest level. In this condition, the junction temperature of LED is the lowest (75. 2 ℃) and is 27. 6 ℃lower than that of using pure epoxy resin. In addition, the minimum junction temperature of the Al2 O3/EP composites is 78. 2 ℃ when the mass fraction of Al2 O3 is 50%.关键词
粘接层/结温/热导率/环氧树脂复合材料/温度分布Key words
adhesive layer/junction temperature/thermal conductivity/epoxy composites/temperature distribution分类
信息技术与安全科学引用本文复制引用
吕亚南,李巧梅,牟其伍,文翰颖,朱玲,寿梦杰..BN & Al2 O3/环氧树脂复合材料粘接层对LED灯结温的影响[J].发光学报,2015,(12):1469-1476,8.基金项目
重庆市国际科技合作项目 （）
重庆大学教学改革研究项目 （）
国家级大学生创新训练项目（201510611027）资助 （）
