Experimental Investigations of Phase Equilibria of MnS Containing Sub-systems in the MnO-SiO_2-AI_2O_3-MnS System

摘要

Phase equilibria of the MnO-MnS, MnO-SiO_2-MnS, and MnO-Al_2O_3-MnS systems under low oxygen partial pressure have been experimentally investigated for the temperature range of 1 200 to 1 500℃ using equilibration and quenching techniques. Equilibrium phases were analyzed by Scanning Electron Microscope, Electron Probe X-ray Microanalysis (EPMA), and Differential Thermal Analysis (DTA). Phase diagrams were successfully constructed for the systems investigated. A ternary compound in the MnO-SiO_2-MnS system was observed at 1 200℃ and 1 250℃. No ternary compound or solid solution was observed in the MnO-Al_2O_3-MnS system. The results of the present study were critically compared with the results reported previously.