Experimental investigation and thermodynamic modeling of the (NiO + CaO + SiO2), (NiO + CaO + MgO) and (NiO + CaO + MgO + SiO2) systems

Prostakova, Viktoria, Chen, Jiang, Jak, Evgueni and Decterov, Sergei A. (2015) Experimental investigation and thermodynamic modeling of the (NiO + CaO + SiO2), (NiO + CaO + MgO) and (NiO + CaO + MgO + SiO2) systems. Journal of Chemical Thermodynamics, 86 130-142. doi:10.1016/j.jct.2015.01.017


Author Prostakova, Viktoria
Chen, Jiang
Jak, Evgueni
Decterov, Sergei A.
Title Experimental investigation and thermodynamic modeling of the (NiO + CaO + SiO2), (NiO + CaO + MgO) and (NiO + CaO + MgO + SiO2) systems
Formatted title
Experimental investigation and thermodynamic modeling of the (NiO + CaO + SiO2), (NiO + CaO + MgO) and (NiO + CaO + MgO + SiO2) systems
Journal name Journal of Chemical Thermodynamics   Check publisher's open access policy
ISSN 1096-3626
0021-9614
Publication date 2015-07-01
Sub-type Article (original research)
DOI 10.1016/j.jct.2015.01.017
Volume 86
Start page 130
End page 142
Total pages 13
Place of publication London, United Kingdom
Publisher Academic Press
Language eng
Formatted abstract
The (NiO + CaO + MgO + SiO2) system and its ternary subsystems (NiO + CaO + MgO) and
(NiO + CaO + SiO2) have been studied by a combination of thermodynamic modeling and experimental
measurements of phase equilibria. A complete literature review and critical evaluation of phase diagrams
and thermodynamic properties of all oxide phases in these systems at 1 atm total pressure are presented.
To resolve the contradictions in the literature data for the (NiO + CaO + SiO2) system, a new experimental
investigation has been carried out over the temperature range from (1330 to 1500) C using an equilibration
and quenching technique followed by electron probe X-ray microanalysis (EPMA). The compositions
of phases for equilibria among liquid, pseudo-wollastonite, clino-pyroxene, olivine and tridymite have
been measured. The whole set of experimental data, including the new experimental results and previously
published data, is taken into consideration in thermodynamic modeling of oxide phases and
optimization of model parameters. The Modified Quasichemical Model is used for the liquid phase.
The models for olivine, melilite and pyroxene solid solutions are developed within the framework of
the Compound Energy Formalism. A self-consistent set of thermodynamic functions of all phases in
the (NiO + CaO + MgO + SiO2) system is obtained, which reproduces all available thermodynamic and
phase diagram data within experimental error limits.
Keyword (CaO + MgO + NiO + SiO2) system
(CaO + NiO + SiO2) system
Measurements of phase equilibria
Nickel extraction
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Engineering Publications
 
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