非金属基导热材料对HPLED散热性能影响

由于光电转换效率较低,产生的多余熬已成为提升单位体积下大功率LED (HPLED)灯光输出量的主要瓶颈,使有效减少HPLED灯热流回路上各界面接触热阻成为重要课题.研究了不同的非金属基导热界面材料在不同环境温度条件下,应用于HPLED灯具模型中的第二界面处时对灯具散热情况的影响.结果表明,具有相变特征的非金属基导热界面材料.在其相变转化点位置之上的某一特定临界点后的热传导性能优于导热系数相对更高的非金属石墨基的界面材料.第二界面材料之间的接触热阻对发挥其导热能力有重要影响.

Effect of Nonmetallic Thermal Conductive Materials on Thermolysis Property of HPLED

Because of low photoelectric conversion efficiency,HPLED produce excrescent quantity of heat becomes the main bottleneck of increasing light output per volume.It is important to reduce the thermal contact resistance of all interfaces in the thermal circuit of HPLED lamp.The effect of nonmetallic thermal conductive interface materials on the heat dissipation of HPLED lamp model was studied at the second interface under different temperatures.Experiment results show that the nonmetallic thermal conductive int...