Experimental determination of the liquid phase domain of the Cu–O–ZnO–SiO2 system in equilibrium with air

L. Xia*, Zhihong Liu, P. Taskinen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)


Phase relationships and liquidus in the Cu–O–ZnO–SiO2 system in air (ptot = 1 atm, (Formula presented.) ) were experimentally determined using the equilibration/quenching/EPMA technique at temperatures 1473, 1573 and 1673 K. No ternary compounds were found. Three solid primary phases [tridymite (SiO2), willemite (Zn2SiO4) and wurtzite (ZnO)] and two three-phase equilibria (liquid oxide + tridymite + willemite, and liquid oxide + willemite + wurtzite) were characterised. Results from the present study and previous studies have been used to construct schematically the liquidus isothermals of the Cu2O–ZnO–SiO2 system in equilibrium with air. The liquidus surface expands along with increasing temperature, and moves towards the primary-phase fields of willemite and wurtzite simultaneously. The constructed liquidus isopleths have been compared with the isothermal ternary sections calculated by MTDATA 5.10 software and its Mtox 8.1 database. The differences are significant, and thus the system requires a re-assessment.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalCanadian Metallurgical Quarterly
Issue number1
Early online date21 Oct 2016
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed


  • Liquidus
  • Mtox
  • Phase diagram
  • Pyrometallurgy
  • Slag chemistry
  • Solubility
  • Thermodynamic modelling

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