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20 January 2023 Verification of the method for measuring the thermal conductivity of solids with dual-wavelength infrared lasers: taking 304 stainless steel as an example
Q. T. Gu, H. X. Zhai, B. L. An, W. Dong, X. Y. Wang, Y. T. Men, Y. L. Zhao, R. X. Wang
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Proceedings Volume 12555, AOPC 2022: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications; 125550G (2023) https://doi.org/10.1117/12.2651631
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China
Abstract
In this paper, the dual laser induced measurement of thermal conductivity of solids is studied based on the laser-induced technique. Perfected the principle of dual-wavelength infrared laser-induced measurement of thermal conductivity of solids, and built an experimental system. According to the principle of measuring the thermal conductivity of solid with dualwavelength infrared laser, an experimental system was built. Taking the fully oxidized 304 stainless steel as an example, the feasibility of the method and the stability of the system are verified; the relationship between thermal conductivity and temperature of 304 stainless steel is obtained; and the influence of the temperature inconsistency between the reference sample and the sample to be tested on the measurement results of the correction factor is analyzed. The results show that the experimental system for measuring the thermal conductivity of solids has good stability, and the stability is within 2% in the range of 873k ~ 1173k; the relationship between thermal conductivity and temperature of 304 stainless steel is K304=0.0144T+14.455; when the temperature is 973K and 1073K, the temperature deviation of the two samples is within 1K, the effect of temperature inconsistency is within 1.3%.
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Q. T. Gu, H. X. Zhai, B. L. An, W. Dong, X. Y. Wang, Y. T. Men, Y. L. Zhao, and R. X. Wang "Verification of the method for measuring the thermal conductivity of solids with dual-wavelength infrared lasers: taking 304 stainless steel as an example", Proc. SPIE 12555, AOPC 2022: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications, 125550G (20 January 2023); https://doi.org/10.1117/12.2651631
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KEYWORDS
Temperature metrology
Signal detection
Solids
Sensors
Infrared lasers
Modulation
Laser applications
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