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Experimental determination of the liquidus of the binary system (Cu2O + CaO) in air at temperature from (1050 to 1500) °C |
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| Institution: | 1. Laboratoire Magmas et Volcans, Clermont Université, Université Blaise Pascal, BP 10448, 63000 Clermont-Ferrand, France;2. CNRS, UMR6524, LMV, 63038 Clermont-Ferrand, France;3. IRD, R 163, LMV, 63038 Clermont-Ferrand, France;4. Sofia University “St Kliment Ohridski”, 15 Tzar Osvoboditel Blvd, 1504 Sofia, Bulgaria;5. Géosciences Rennes, Université Rennes 1, CNRS UMR 6118, Campus de Beaulieu, 35042 Rennes Cedex, France;1. Cincinnati Children''s Hospital Medical Center, Cincinnati, OH, USA;2. Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA;3. Boston College, Boston, MA, USA;4. Kenyon College, Department of Psychology, Gambier, OH, USA;5. University of Cincinnati College of Medicine, Cincinnati, OH, USA |
| Abstract: | The liquidus of the binary system (Cu2O + CaO) has been experimentally investigated over the temperature range from (1050 to 1500) °C in air. The liquidus has been quantified by the equilibration/quench/analysis technique. Equilibrated specimens were quenched in brine solution of 10 wt% NaCl. Specimens were then examined by Energy-Dispersive X-ray Spectroscopy (EDS) and Electron probe micro-analyzer (EPMA) to quantify liquid chemical compositions. This work reveals that the solubility of CaO in the liquid phase of the binary (Cu2O + CaO) at higher temperatures is lower than previously reported, and the deviation systematically increases with a corresponding increase in temperature. This is predominant at temperatures between (1300 and 1500) °C where a deviation of up to 5 wt% in CaO solubility is observed. The solubility of Cu2O in liquid phase for the cuprite saturated section of the binary however is consistent with all the previous authors. |
| Keywords: | Phase equilibria Phase diagram CaO |
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