期刊
MEASUREMENT SCIENCE AND TECHNOLOGY
卷 24, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-0233/24/1/015603
关键词
normal spectral emissivity; electromagnetic levitation; static magnetic field; molten copper; Drude model
资金
- SENTAN, JST
The normal spectral emissivity of molten copper was determined in the wavelength range of 780-920 nm and in the temperature range of 1288-1678 K, by directly measuring the radiance emitted by an electromagnetically levitated molten copper droplet under a static magnetic field of 1.5 T. The spectrometer for radiance measurement was calibrated using the relation between the theoretical blackbody radiance from Planck's law and the light intensity of a quasi-blackbody radiation source measured using a spectrometer at a given temperature. As a result, the normal spectral emissivity of molten copper was determined as 0.075 +/- 0.011 at a wavelength of 807 nm, and it was found that its temperature dependence is negligible in the entire measurement temperature range tested. In addition, the results of the normal spectral emissivity and its wavelength dependence were discussed, in comparison with those obtained using the Drude free-electron model.
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