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AlN摻雜的鎵基液態(tài)金屬硅脂在散熱冷卻上的應(yīng)用
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中山大學(xué),中山大學(xué),中山大學(xué),中山大學(xué)

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


AlN Ga-based liquid metal thermal grease cooling for heat dissipation
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School of materials science and engineering,Sun Yat-Sen University,School of materials science and engineering,Sun Yat-Sen University,School of materials science and engineering,Sun Yat-Sen University,School of materials science and engineering,Sun Yat-Sen University

Fund Project:

National Nature Science Foundation of China

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    摘要:

    為了增強(qiáng)界面?zhèn)鳠嵝Ч瑢㈡壔簯B(tài)金屬（Ga68.5In21.5Sn10）及氮化鋁作為導(dǎo)熱填料填充到甲基硅油中制備了一種新型復(fù)合的熱界面材料，并利用掃描電子顯微鏡（SEM）和能譜儀（EDS）檢測(cè)材料的微觀結(jié)構(gòu)和化學(xué)成分以研究其導(dǎo)熱原理。合成的AlN摻雜的鎵基液態(tài)金屬硅脂導(dǎo)熱率可達(dá)5.014w /m·K，分別高于液態(tài)金屬/甲基硅油二元復(fù)合材料和現(xiàn)售高端的導(dǎo)熱硅脂產(chǎn)品（x-23-7762）約5%和20%。同時(shí)，接觸熱阻減少了約20%和50%，粘度保持在適當(dāng)?shù)姆秶鷥?nèi)降低了使用過(guò)程中的溢出風(fēng)險(xiǎn)。CPU的實(shí)測(cè)結(jié)果表明新合成的AlN摻雜的鎵基液態(tài)金屬硅脂可以顯著降低筆記本核心的工作溫度，分析其導(dǎo)熱機(jī)理后提出傳熱過(guò)程的協(xié)同效應(yīng)原理。實(shí)驗(yàn)結(jié)果表明該產(chǎn)品是一種理想的導(dǎo)熱界面材料且具有廣泛的應(yīng)用前景。

    Abstract:

    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.

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劉韓,劉輝強(qiáng),林左葉,楚盛. AlN摻雜的鎵基液態(tài)金屬硅脂在散熱冷卻上的應(yīng)用[J].稀有金屬材料與工程,2018,47(9):2668~2674.[Liu Han, Liu Huiqiang, Lin Zuoye, Chu Sheng. AlN Ga-based liquid metal thermal grease cooling for heat dissipation[J]. Rare Metal Materials and Engineering,2018,47(9):2668~2674.]
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  • 收稿日期:2017-05-16
  • 最后修改日期:2017-08-26
  • 錄用日期:2017-09-11
  • 在線發(fā)布日期: 2018-11-01
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