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刘韩,刘辉强,林左叶,楚盛.AlN掺杂的镓基液态金属硅脂在散热冷却上的应用[J].稀有金属材料与工程(英文),2018,47(9):2668~2674.[Liu Han,Liu Huiqiang,Lin Zuoye and Chu Sheng.AlN Ga-based liquid metal thermal grease cooling for heat dissipation[J].Rare Metal Materials and Engineering,2018,47(9):2668~2674.]
AlN Ga-based liquid metal thermal grease cooling for heat dissipation
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Received:May 16, 2017  Revised:August 26, 2017
Key words: Ga-based Liquid Metal  AlN  thermal grease  heat transfer enhancement
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
Liu Han,Liu Huiqiang,Lin Zuoye and Chu Sheng  
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      A new composite thermal interface material (TIM) was synthesized by combining AlN with liquid metal (LM, Ga68.5In21.5Sn10) and polydimethylsiloxane (PDMS), one of the most commonly used silicone oils, to enhance the interfacial heat transfer. The microstructure and chemical composition of the material were measured using scanning electron microscopy (SEM) with an energy dispersive spectrometer (EDS) to investigate its principle of heat dissipation. The thermal conductivity (κ) of the AlN liquid metal thermal grease (ALTG) was found to be 5.014 W/m·K, higher than that of a liquid metal/PDMS composite (LMTG) and higher than that of one of the best existing thermal grease products (X23-7762) by approximately 5% and 20%, respectively. Meanwhile, the thermal contact resistance (R) was reduced by 20% and 50%, respectively, and the viscosity remained in an appropriate range, reducing the risks of overflow during usage. An actual test on a CPU showed that ALTG could significantly reduce the operating temperature. The thermal mechanism of ALTG was studied, and a synergistic effect was suggested for the heat transfer process. The results prove the ideal heat dissipation properties of TIMs and their wide application prospects in industry.