TY - JOUR
T1 - Equilibrium Phase Relations of the CaO-SiO2-Ti3O5 System at 1400 °C and a p(O2) of 10−16 atm
AU - Shi, Junjie
AU - Qiu, Yuchao
AU - Wan, Xingbang
AU - Yu, Bin
AU - Chen, Min
AU - Zhao, Fei
AU - Li, Jianzhong
AU - Liu, Changsheng
AU - Taskinen, Pekka
N1 - Funding Information:
This study received financial support from the China Postdoctoral Science Foundation (Grant numbers 2020TQ0059 and 2020M680967), the Natural Science Foundation of Liaoning Province (2021-MS-083), and the Fundamental Research Funds for the Central Universities (N2125010).
Publisher Copyright:
© 2021, The Minerals, Metals & Materials Society.
PY - 2022/2
Y1 - 2022/2
N2 - The phase relations of TiOx containing systems in reducing atmospheres are extremely important for understanding the smelting process for vanadium titano-magnetite. In the present work, the equilibrium phase relations for the core CaO-SiO2-Ti3O5 system at 1400 °C and oxygen partial pressure of 10−16 atm were determined. Ti3O5 was confirmed as the stable Ti oxide in CO(g)-C equilibrium, and the solid phases Ti3O5, 3CaO·Ti3O5, SiO2, and CaO·SiO2 were found to coexist with the liquid oxide within the composition range investigated. The 1400 °C isothermal phase diagram of the CaO-SiO2-Ti3O5 system was constructed to demonstrate the areas of single liquid, as well as the two-phase and three-phase domains. Furthermore, a comparison with results in the literature indicated that the single liquid domain at 1400 °C greatly shrinks when the oxygen partial pressure decreases from air to 10−16 atm, and the corresponding liquid coexisting phases of TiO2 and CaO·TiO2 transform to Ti3O5 and 3CaO·Ti3O5.
AB - The phase relations of TiOx containing systems in reducing atmospheres are extremely important for understanding the smelting process for vanadium titano-magnetite. In the present work, the equilibrium phase relations for the core CaO-SiO2-Ti3O5 system at 1400 °C and oxygen partial pressure of 10−16 atm were determined. Ti3O5 was confirmed as the stable Ti oxide in CO(g)-C equilibrium, and the solid phases Ti3O5, 3CaO·Ti3O5, SiO2, and CaO·SiO2 were found to coexist with the liquid oxide within the composition range investigated. The 1400 °C isothermal phase diagram of the CaO-SiO2-Ti3O5 system was constructed to demonstrate the areas of single liquid, as well as the two-phase and three-phase domains. Furthermore, a comparison with results in the literature indicated that the single liquid domain at 1400 °C greatly shrinks when the oxygen partial pressure decreases from air to 10−16 atm, and the corresponding liquid coexisting phases of TiO2 and CaO·TiO2 transform to Ti3O5 and 3CaO·Ti3O5.
UR - http://www.scopus.com/inward/record.url?scp=85123116226&partnerID=8YFLogxK
U2 - 10.1007/s11837-021-05049-3
DO - 10.1007/s11837-021-05049-3
M3 - Article
AN - SCOPUS:85123116226
VL - 74
SP - 668
EP - 675
JO - JOM
JF - JOM
SN - 1047-4838
IS - 2
ER -