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Determination of refractive index and absorption coefficient of iron- oxide-bearing slags

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Abstract

The refractive index and absorption coefficient of amorphous Fe2O3-SiO2-CaO-Al2O3 slags have been determined at room temperature as functions of the basicity of [mass pct CaO]/[mass pct SiO2] and the Fe2O3 concentration. The refractive index has been measured by an ellipsometer at 546 nm, and the absorption coefficient has been determined from transmittance measured by a spectrophotometer in the wavelength range of 350 to 1000 nm. The refractive index increases with increasing basicity of [CaO]/[SiO2] and the Fe2O3 concentration. On the other hand, with decreasing basicity of [CaO]/[SiO2], the absorption coefficient is increased in the near-infrared region, and the absorption edge by the charge transfer band is shifted to a shorter wavelength. With increasing Fe2O3 concentration, the absorption coefficient is increased in the measured wavelength range, and the absorption edge by the charge transfer band is shifted to a longer wavelength. These dependences of refractive index and absorption coefficient on the basicity and the Fe2O3 concentration are discussed.

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Authors and Affiliations

  1. Department of Metallurgical Engineering, Tokyo Institute of Technology, 152, Tokyo, Japan

    Masahiro Susa (Research Associate), Futao Li (Graduate Student) & Kazuhiro Nagata (Associate Professor)

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  1. Masahiro Susa
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  2. Futao Li
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  3. Kazuhiro Nagata
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Susa, M., Li, F. & Nagata, K. Determination of refractive index and absorption coefficient of iron- oxide-bearing slags. Metall Trans B 23, 331–337 (1992). https://doi.org/10.1007/BF02656289

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