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| Test Method of In-plane Thermal Conductivity of Thin Films Based on Laser Thermal Imaging |
| CHEN Mingxin,HOU Dexin,YE Shuliang |
| Institute of Industry and Trade Measurement Technique, China Jiliang University, Hangzhou, Zhejiang 310018, China |
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Abstract A laser-based heat flow loop integration test method is proposed to simulate and demonstrate the difference in heat loss between laser heating and conventional electrical heating solutions; the calibration of key parameters such as laser heating power, surface heat transfer coefficient and temperature measurement model gain coefficient are analysed and the corresponding methods are designed. The experiments are based on 15 thin films and sheets of different materials or thicknesses, and the relative deviations between the test results and the reference values are less than 6%. The test errors of samples with thermal conductivity less than 3W/(m·K)are significantly better than those of the conventional method, indicating that the method can effectively improve the test accuracy of the heat flow loop integration method for low thermal conductivity films.
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Received: 30 June 2022
Published: 22 January 2024
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2024, Vol. 45 
