Phase equilibria studies in the SiO2-K2O-CaO system

Chen, Mao, Hou, Xinmei, Chen, Junhong and Zhao, Baojun (2016) Phase equilibria studies in the SiO2-K2O-CaO system. Metallurgical and Materials Transactions B - Process Metallurgy and Materials Processing Science, 47 3: 1690-1696. doi:10.1007/s11663-016-0623-z


Author Chen, Mao
Hou, Xinmei
Chen, Junhong
Zhao, Baojun
Title Phase equilibria studies in the SiO2-K2O-CaO system
Formatted title
Phase equilibria studies in the SiO2-K2O-CaO system
Journal name Metallurgical and Materials Transactions B - Process Metallurgy and Materials Processing Science   Check publisher's open access policy
ISSN 1073-5615
1543-1916
Publication date 2016-06-01
Sub-type Article (original research)
DOI 10.1007/s11663-016-0623-z
Open Access Status Not Open Access
Volume 47
Issue 3
Start page 1690
End page 1696
Total pages 7
Place of publication New York, United States
Publisher Springer
Language eng
Formatted abstract
Phase equilibria in the SiO2-K2O-CaO system have been experimentally investigated in the SiO2-rich area. High-temperature equilibration, rapid quenching, and electron probe X-ray microanalysis (EPMA) techniques have been used in this study. K2O may vaporize during EPMA measurements causing significant uncertainties. In the present study, optimum EPMA operating conditions have been determined in order to accurately measure K2O concentrations in the quenched samples. The compositions of all phases present in the quenched sample were measured using EPMA with optimum operating parameters. The following primary phase fields were identified in the composition range investigated: SiO2, CaO·SiO2, 2CaO·SiO2, K2O·2CaO·2SiO2, and K2O·6CaO·4SiO2. The isotherms between 1273 K and 1473 K (1000 °C and 1200 °C) in these primary phase fields have been determined. The presence of the compounds K2O·2CaO·2SiO2 and K2O·6CaO·4SiO2 has been confirmed.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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Created: Mon, 22 Feb 2016, 19:33:42 EST by Mr Mao Chen on behalf of School of Chemical Engineering