Experimental determination of the 1300 °C and 1400 °C isotherms for CaO–SiO2–TiO2-10 wt% Al2O3 system in air

Min Chen, Junjie Shi*, Pekka Taskinen, Ari Jokilaakso

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

Phase equilibrium relations for the CaO–SiO2–TiO2-10 wt%Al2O3 system were studied at 1300 °C and 1400 °C by a high temperature equilibration and quenching method, with the purpose of extending the equilibrium phase information for the TiO2-containing slag systems. Equilibrium phase assemblies and phase compositions were analyzed by Scanning Electron Microscopy (SEM) equipped with an X-ray Energy Dispersive Spectroscopy (EDS). The equilibrium solid phases of perovskite CaO·TiO2, wollastonite CaO·SiO2, rutile TiO2, silica SiO2 and sphene CaO·SiO2·TiO2 were confirmed to coexist with a liquid phase. Based on the experimental results, the 1300 °C and 1400 °C isotherms were constructed in the CaO–SiO2–TiO2-10 wt% Al2O3 quasi-ternary phase diagram. Significant discrepancies were found between the present results and the simulated results by FactSage and MTDATA databases, as well as the results from previous literature.

Original languageEnglish
Pages (from-to)9183-9191
Number of pages9
JournalCeramics International
Volume46
Issue number7
DOIs
Publication statusPublished - May 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Ceramics
  • Experimental thermodynamics
  • Isotherm
  • MTDATA
  • Slag
  • TiO

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