Analytical Study of Radiation and Conduction Heat Transfer in Infrared Transmitting Chalcogenide Glass

概要

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Transient temperature distribution in an infrared transmitting chalcogenide glass when this glass was heated by infrared radiation and a numerical solution by explicit difference equation of a combined radiation and conduction problem were investigated. In this explicit difference equation, the total reflection term that could not be neglected when the refraction took large value was considered, and in this consideration for wavelength dependence was investigated by the band model approximation. Thermal and optical properties of chalcogenide glass were measured out of necessity for the calculation of transient temperature distribution in glass using the explicit difference equation. Comparing the calculation result of chalcogenide glass with the result of soda-lime glass in the case of radiation heating, the special characters of chalcogenide glass as infrafed window glass were confirmed; for example, small temperature rise rate, and small temperature difference in glass.
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