TY - JOUR
T1 - Experimental Study on the Phase Relations of the SiO2-MgO-TiO2 System in Air at 1500°C
AU - Chen, Min
AU - Wan, Xingbang
AU - Shi, Junjie
AU - Taskinen, Pekka
AU - Jokilaakso, Ari
N1 - Lisään tiedoston kun VoR on saatavilla (LH)
Funding Information:
This work was partly financed by the Aalto University School of Chemical Engineering. The Academy of Finland’s RawMatTERS Finland Infrastructure (RAMI) based at Aalto University, GTK Espoo, and VTT Espoo was utilized in this study. The authors are grateful to the China Scholarship Council for financial support [Grant Number 201806370217, 201706370096]. This study received financial support from the Project funded by China Postdoctoral Science Foundation [Grant Number 2020TQ0059, 2020M680967] and the Natural Science Foundation of Liaoning Province. Mr. Junmo Jeon is greatly appreciated for his assistance in XRD analyses. The authors declare that they have no conflict of interest.
Publisher Copyright:
© 2021, The Author(s).
PY - 2022/2
Y1 - 2022/2
N2 - We investigated the phase relations of the SiO2-MgO-TiO2 system in air at 1500°C using the high-temperature isothermal equilibration/quenching technique, followed by x-ray diffraction measurements and direct phase analysis using scanning electron microscopy coupled with x-ray energy dispersive spectrometry. One single liquid phase domain, five two-phase domains (liquid-TiO2, liquid-cristobalite, liquid-MgO·SiO2, liquid-2MgO·SiO2, and liquid-MgO·2TiO2), and five three-phase regions (liquid-TiO2-MgO·2TiO2, liquid-MgO·SiO2-cristobalite, liquid-TiO2-cristobalite, liquid-MgO·SiO2-2MgO·SiO2 and liquid-2MgO·SiO2-MgO·2TiO2) were observed. We constructed a 1500°C isothermal phase diagram based on the experimentally measured liquid compositions. We compared simulations using MTDATA and FactSage thermodynamic software and their databases with the experimental results obtained in this study. These results can be used to provide guidelines for updating the MTDATA and FactSage titania-bearing thermodynamic databases by reassessing the thermodynamic properties of the phase with new experimental data.
AB - We investigated the phase relations of the SiO2-MgO-TiO2 system in air at 1500°C using the high-temperature isothermal equilibration/quenching technique, followed by x-ray diffraction measurements and direct phase analysis using scanning electron microscopy coupled with x-ray energy dispersive spectrometry. One single liquid phase domain, five two-phase domains (liquid-TiO2, liquid-cristobalite, liquid-MgO·SiO2, liquid-2MgO·SiO2, and liquid-MgO·2TiO2), and five three-phase regions (liquid-TiO2-MgO·2TiO2, liquid-MgO·SiO2-cristobalite, liquid-TiO2-cristobalite, liquid-MgO·SiO2-2MgO·SiO2 and liquid-2MgO·SiO2-MgO·2TiO2) were observed. We constructed a 1500°C isothermal phase diagram based on the experimentally measured liquid compositions. We compared simulations using MTDATA and FactSage thermodynamic software and their databases with the experimental results obtained in this study. These results can be used to provide guidelines for updating the MTDATA and FactSage titania-bearing thermodynamic databases by reassessing the thermodynamic properties of the phase with new experimental data.
UR - http://www.scopus.com/inward/record.url?scp=85115250334&partnerID=8YFLogxK
U2 - 10.1007/s11837-021-04870-0
DO - 10.1007/s11837-021-04870-0
M3 - Article
AN - SCOPUS:85115250334
SN - 1047-4838
VL - 74
SP - 676
EP - 688
JO - JOM
JF - JOM
IS - 2
ER -