You Yuxin, Zhang Beibei, Tao Sulian, Liang Zihui, Tang Biao, Zhou Rui, Yuan Dong
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.
SCNU-TUE Joint Lab of Device Integrated Responsive Materials (DIRM), National Center for International Research on Green Optoelectronics, South China Normal University, No 378, West Waihuan Road, Guan zhou Higher Education Mega Center, Guangzhou 510006, China.
Micromachines (Basel). 2021 Mar 4;12(3):265. doi: 10.3390/mi12030265.
Heat sinks are widely used in electronic devices with high heat flux. The design and build of microstructures on heat sinks has shown effectiveness in improving heat dissipation efficiency. In this paper, four kinds of treatment methods were used to make different microstructures on heat sink surfaces, and thermal radiation coating also applied onto the heat sink surfaces to improve thermal radiation. The surface roughness, thermal emissivity and heat dissipation performance with and without thermal radiation coating of the heat sinks were studied. The result shows that with an increase of surface roughness, the thermal emissivity can increase up to 2.5 times. With thermal radiation coating on a surface with microstructures, the heat dissipation was further improved because the heat conduction at the coating and heat sink interface was enhanced. Therefore, surface treatment can improve the heat dissipation performance of the heat sink significantly by enhancing the thermal convection, radiation and conduction.
散热器广泛应用于具有高热通量的电子设备中。在散热器上设计和构建微结构已显示出在提高散热效率方面的有效性。本文采用四种处理方法在散热器表面制作不同的微结构，并在散热器表面涂覆热辐射涂层以改善热辐射。研究了散热器有无热辐射涂层时的表面粗糙度、热发射率和散热性能。结果表明，随着表面粗糙度的增加，热发射率可提高至2.5倍。在具有微结构的表面上涂覆热辐射涂层后，散热进一步改善，因为涂层与散热器界面处的热传导得到增强。因此，表面处理可通过增强热对流、辐射和传导来显著提高散热器的散热性能。
