Effect of Graphene Nanoplatelet Concentration on the Thermal Conductivity of Silicone Thermal Grease

Автор(ы) M.T. Phuong1,2, P.V. Trinh1 , N.V. Tuyen1,2, N.N. Dinh1,2, P.N. Minh3, N.D. Dung4, B.H. Thang1,3
Принадлежность

1Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet St., Cau Giay Distr., Hanoi, Vietnam

2VNU University of Engineering and Technology, 144 Xuan Thuy Road, Cau Giay Distr., Hanoi, Vietnam

3Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet St., Cau Giay Distr., Hanoi, Vietnam

4Department of Materials Science & Engineering, National Tsing-Hua University, Hsinchu 30013, Taiwan

Е-mail trinhpv@ims.vast.vn
Выпуск Том 11, Год 2019, Номер 5
Даты Received 03 May 2019; revised manuscript received 21 October 2019; published online 25 October 2019
Ссылка M.T. Phuong, P.V. Trinh, N.V. Tuyen, et al., J. Nano- Electron. Phys. 11 No 5, 05039 (2019)
DOI https://doi.org/10.21272/jnep.11(5).05039
PACS Number(s) 65.60.+a, 65.80.+n
Ключевые слова Graphene (21) , Silicone thermal grease, Thermal interface material, Thermal conductivity (2) .
Аннотация

We herein report a facile route to improve the thermal conductivity of silicone thermal grease without deteriorating its conformability via exploitation of outstanding thermal conductivity and mechanical flexibility/ductility of graphene materials. The silicone thermal greases containing GNPs were prepared by using the high-energy ball milling process. The SEM images proved that GNPs were well dispersed in the base grease. The thermal conductivity of the thermal greases was investigated and presented. The obtained results demonstrated that GNPs are efficient for the thermal conductivity enhancement of the thermal grease. The highest thermal conductivity enhancement up to 59% was obtained with the grease containing 0.75vol.% GNPs. The enhancement could be attributed to high thermal conductivity of GNPs, the good compatibility and uniform dispersion of GNPs in the thermal grease. The thermal conductivity of the thermal grease with higher GNPs concentration of 1vol.% was decreased due to the formation of GNPs clusters. By using Chu’s model with the interfacial thermal resistance (Rk) fitting, we found that the thermal conductivity enhancement of the thermal grease concerns to the Rk between GNPs and the grease matrix. The best way to improve the thermal conductivity of the thermal grease is to reduce the Rk. The obtained results demonstrated the advantages of GNP in the thermal greases for the heat dissipation in high power electronic devices.

Список литературы