Phase equilibria of the CaO–SiO2–TiO2–Al2O3–MgO system in air at 1250–1400 °C

No Thumbnail Available
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-12-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Ceramics International
Abstract
The equilibrium phase relations of the CaO–SiO2–TiO2–Al2O3–MgO system were investigated experimentally in air at 1250–1400 °C using a high-temperature equilibration/quenching technique, followed by direct phase analysis by scanning electron microscopy equipped with X-ray energy dispersive spectroscopy. The equilibrium solid phases of silica, rutile, and pseudobrookite solid solution were found to coexist with the liquid phase. The 1300–1400 °C isothermal sections were constructed based on the experimentally measured liquid compositions. The experimental results were compared with simulations using MTDATA and FactSage thermodynamic software and their databases. This study provides guidelines for the selective crystallization of pseudobrookite from titania-bearing slag.
Description
Keywords
Phase equilibria, Thermodynamic, Titania-bearing slag, Liquidus temperature, Circular economy
Other note
Citation
Chen , M , Shi , J , Taskinen , P & Jokilaakso , A 2020 , ' Phase equilibria of the CaO–SiO2–TiO2–Al2O3–MgO system in air at 1250–1400 °C ' , Ceramics International , vol. 46 , no. 17 , pp. 27702-27710 . https://doi.org/10.1016/j.ceramint.2020.07.268