薄膜面内微结构对热物性的调控研究

Translated title of the contribution: Tuning the thermophysical property of polyimide thin films by in-plane microstructure design

Qian Zhao, Zhuo Li, Defang Li, Liqiang Xu, Xin Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A method of fabricating in-plane microstructures to control the in-plane thermal conductivity and the surface infrared emissivity of the polyimide film was proposed. By establishing a simplified two-dimensional heat transfer model, the equivalent in-plane thermal conductivity of a periodic microstructured film was calculated. The effects of the contact area ratio and the filling factor of the microstructures on the equivalent thermal conductivity and the equivalent infrared emissivity were studied. Theoretical calculations show that when the contact area ratio was 0.18 and the fill factor was 0.28, the equivalent in-plane thermal conductivity of the polyimide film was decreased to 18.8% compared to that of the material itself. Two polyimide film samples with different contact area ratios and fill factors were fabricated. The diameter and the thickness of both films were 65mm and 500nm, respectively. The in-plane thermal conductivity of the pure polyimide film measured by a non-contacted in-plane thermal conductivity measurement was 0.164W/mK, and the in-plane thermal conductivities of the microstructured polyimide film with contact area ratio of 0.20 and 0.46 were 0.041W/mK and 0.091W/mK, and the emissivity were 0.161 and 0.175, respectively.

Translated title of the contributionTuning the thermophysical property of polyimide thin films by in-plane microstructure design
Original languageChinese (Traditional)
Pages (from-to)301-309
Number of pages9
JournalGuangxue Jishu/Optical Technique
Volume46
Issue number3
Publication statusPublished - 1 May 2020

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