Abstract
A new thermographic express technique for determining the thermal diffusivity of transparent materials and optical components is described, and results from testing it on glasses and polymeric materials are presented. An algorithm for deriving the thermal diffusivity coefficient from the raw data eliminates the need to determine the absolute temperatures and absorbed energy of the incident radiation flux, ensuring a random error of less than 2–3%.
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ACKNOWLEDGMENTS
Experimental results were obtained on equipment at Tambov State University’s shared resource center.
Funding
This work was supported by the Russian Science Foundation (project no. 15-19-00181, experiment and data processing), the Russian Foundation for Basic Research (project no. 17-48-680817, development of analytical and computer models), and the Ministry of Science and Higher Education of the Russian Federation (project no. 16.2100.2017/4.6, manufacturing and debugging of the original pilot device).
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Translated by. O. Zhukova
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Golovin, Y.I., Tyurin, A.I., Golovin, D.Y. et al. Determining the Temperature Diffusivity of Transparent Materials via a Modified Laser Flash Technique. Bull. Russ. Acad. Sci. Phys. 84, 829–834 (2020). https://doi.org/10.3103/S1062873820070114
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DOI: https://doi.org/10.3103/S1062873820070114