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大学・研究所にある論文を検索できる 「Determination of Area fraction of Free Lime in Steelmaking Slag Using Cathodoluminescence and X-ray Excited Optical Luminescence」の論文概要。リケラボ論文検索は、全国の大学リポジトリにある学位論文・教授論文を一括検索できる論文検索サービスです。
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Determination of Area fraction of Free Lime in Steelmaking Slag Using Cathodoluminescence and X-ray Excited Optical Luminescence

Susumu Imashuku Kazuaki Wagatsuma 東北大学 DOI:10.1007/s11663-020-01927-4

2020.08.06

概要

Determining the free lime (f-CaO) content in steelmaking slag is critical for road construction because f-CaO is likely to cause road expansion. Herein, we present a method to determine an area fraction of f-CaO from fractions of illuminated areas related to f-CaO in cathodoluminescence (CL) and X-ray excited optical luminescence (XEOL) images of industrial steelmaking slag, which is simpler and quicker than the commonly employed ethylene glycol extraction method. Aheat-treatment that was quenched the industrial steelmaking slag from 1000 °C was needed to obtain intense luminescence from f- CaO, which originated from a peak at 600 nm. Other mineral phases, such as Ca2SiO4, free magnesia, and 2CaOAl2O3SiO2, were distinguishable from f-CaO from their luminescent colors. When we analyzed three types of industrial steelmaking slag with different f-CaO contents, the order of the fractions of the illuminated areas originating from f-CaO in the CL images was consistent with that of the f-CaO content measured applying the ethylene glycol extraction method. The average exposure times it took the CL and XEOL images to detect the luminescence from f-CaO were 5 and 30 s, respectively. In particular, acquiring XEOL images is promising for on-site analysis

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