Coupled phase diagram experiments and thermodynamic optimization of the binary Li2O-MgO and Li2O-CaO systems and ternary Li2O-MgO-CaO system. Issue 16 (November 2017)

• Record Type: Journal Article
• Authors: Konar, Bikram; Kim, Dong-Geun; Jung, In-Ho
• Is Part Of: Ceramics international. Volume 43:Issue 16(2017)
• Page Start: 13055
• Page End: 13062
• Publication Date: 2017-11
• Subjects: Li2O-MgO -- Li2O-CaO -- Phase diagram -- DSC analysis -- Thermodynamic modeling; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.06.143
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A key phase diagram study of the Li2 O-MgO and Li2 O-CaO systems at 1 atm was performed using equilibration/quenching experiments and differential scanning calorimetry measurements with sealed 90Pt-10Rh crucibles. In particular, the eutectic temperatures of both systems and the solubility of Li2 O in solid MgO and CaO were properly measured for the first time. The eutectic temperatures of the Li2 O-MgO and Li2 O-CaO systems were determined to be 1696 ± 6 K (1423 ± 6 °C) and 1617 ± 6 K (1344 ± 6 °C), respectively. A solubility of 2.6 mol% (1.9 wt%) Li2 O in solid MgO was measured at 1743 K (1470 °C) and no detectable solubility of Li2 O in solid CaO was determined. The present experimental results were employed for the thermodynamic modeling of the binary Li2 O-MgO and Li2 O-CaO systems. The phase diagrams for the binary Li2 O-MgO and Li2 O-CaO systems were constructed for the first time, and the phase diagram of the ternary Li2 O-MgO-CaO system was predicted from the binary descriptions.