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Photon conductivity of metallurgical slags of the three component system CaO‐SiO 2 ‐Al 2 O 3
Author(s) -
Gammal Tarek El,
Wosch Erwin
Publication year - 1993
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199301558
Subject(s) - analytical chemistry (journal) , thermal conductivity , refractive index , emissivity , mineralogy , slag (welding) , conductivity , chemistry , atmospheric temperature range , materials science , metallurgy , physics , thermodynamics , optics , composite material , chromatography
The measuring method proposed by Keene and Quinn has been further developed to investigate 3‐component slags of the system CaO‐SiO 2 ‐Al 2 O 3 at temperatures of 800–1600°C in the wavelength range of 550 to 850 nm. The results are presented with the aid of the complex refraction index, which embodies all information on the optical properties of the slags investigated, including photon conductivity and thermal emissivity. Comparison of the photon conductivities determined shows good agreement with the corresponding values of various types of glass cited in literature. The discontinuous pattern of the phonon conductivity curve in the melting range of 40% CaO‐40% SiO 2 ‐20% Al 2 O 3 slag, as already found by Gammal and Li, is also evident from the data of the present investigation.