Liquidus in System Cu_2O - CaO - Al_2O_3 at 1250°C

摘要

We present experimental results for the liquidus in the system Cu_2O - CaO - Al_2O_3 at 1250°C. In this study, we quantified the liquidus by the equilibration/quench/analysis technique, with Cu_2O, Al_2O_3, and CaO as primary materials exclusively. Experiments were conducted in air at an at oxygen pressure (p) = 21.3 kPa). Equilibrated specimens were quenched in brine solution of 10 wt% NaCl. We then quantified the liquid chemical compositions by means of Energy-Dispersive X-Ray Spectroscopy (EDS) and Electron probe micro-analyzer (EPMA). This study reveals inconsistences in liquidus surface of the present ternary diagram of the system here in mentioned. Differences of up to 10 wt % compositions of the species have been observed.