Normal spectral emissivity measurement of molten copper using an electromagnetic levitator superimposed with a static magnetic field

Ryo Kurosawa, Takamitsu Inoue, Yuya Baba, Kenichi Sugioka, Masaki Kubo, Takao Tsukada, Hiroyuki Fukuyama

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The normal spectral emissivity of molten copper was determined in the wavelength range of 780-920nm and in the temperature range of 1288-1678K, 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 807nm, 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.

Original languageEnglish
Article number015603
JournalMeasurement Science and Technology
Volume24
Issue number1
DOIs
Publication statusPublished - 2013 Jan

Keywords

  • Drude model
  • electromagnetic levitation
  • molten copper
  • normal spectral emissivity
  • static magnetic field

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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