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Experimental study of phase equilibria in the MnO-Si-2-"TiO2"-"Ti2O3" system

Title
Experimental study of phase equilibria in the MnO-Si-2-"TiO2"-"Ti2O3" system
Authors
Kang, YBLEE, HAE GEON
POSTECH Authors
Kang, YB
Date Issued
Jan-2005
Publisher
IRON STEEL INST JAPAN KEIDANREN KAIKA
Abstract
Phase equilibria and liquidus surface in the system MnO-SiO2-"TiO2"-"Ti2O3" under controlled atmosphere have been investigated in the temperature range from 1200 to 1 500 degrees C and in the range of log PO2 from -7.6 (pCO/pCO(2)=1) to -16.6 (C-CO equilibration). High-temperature equilibration, quenching and electron probe microanalysis (EPMA) were employed to obtain equilibrium compositions of liquid and several solid solutions. The following primary phases have been observed
molten oxide, manganosite (MnO), ru-tile (TiO2-delta), tridymite and cristobalite (SiO2), tephroite (Mn2SiO4), rhodonite (MnSiO3), spinel (Mn2TiO4-MnTiO4), pyrophanite (MnTiO3-Ti2O3) and pseudobrookite ("MnTi2O5"-Ti3O5) solid solutions. By decreasing oxygen partial pressure, homogeneous liquid oxide area becomes smaller. No ternary compounds or ternary solid solutions were observed.
Phase equilibria and liquidus surface in the system MnO-SiO2-"TiO2"-"Ti2O3" under controlled atmosphere have been investigated in the temperature range from 1200 to 1 500 degrees C and in the range of log PO2 from -7.6 (pCO/pCO(2)=1) to -16.6 (C-CO equilibration). High-temperature equilibration, quenching and electron probe microanalysis (EPMA) were employed to obtain equilibrium compositions of liquid and several solid solutions. The following primary phases have been observed; molten oxide, manganosite (MnO), ru-tile (TiO2-delta), tridymite and cristobalite (SiO2), tephroite (Mn2SiO4), rhodonite (MnSiO3), spinel (Mn2TiO4-MnTiO4), pyrophanite (MnTiO3-Ti2O3) and pseudobrookite ("MnTi2O5"-Ti3O5) solid solutions. By decreasing oxygen partial pressure, homogeneous liquid oxide area becomes smaller. No ternary compounds or ternary solid solutions were observed.
URI
http://oasis.postech.ac.kr/handle/2014.oak/15766
DOI
10.2355/isijinternational.45.1552
ISSN
0915-1559
Article Type
Article
Citation
ISIJ INTERNATIONAL, vol. 45, no. 11, page. 1552 - 1560, 2005-01
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강윤배KANG, YOUN BAE
Ferrous & Energy materials Technology
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