Abstract
In this article, an experimental apparatus for measurements of the emissivity of a metal at different temperatures at \(1.5\, \upmu \text{ m }\) has been developed. Using this apparatus, the emissivity of steel 201, 304, and 321 samples has been measured at different temperatures, and the effects of the temperature, composition, and heating time of steel samples on the emissivity are analyzed according to the measured data. The measured data could be fitted to the same exponential function with the linear least-squares technique, and the fitting accuracy reaches relatively high quality. The measurement uncertainty of this experimental apparatus is analyzed. The analyses show that the measured emissivity is reliable.
Published Version
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