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Analytical Phase Diagram Calculation of the System MnO‐NiO from Experimental Activity Data
Author(s) -
CHO SEUNGAM,
LEóNSUCRE CARLOS E.
Publication year - 1982
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1982.tb10449.x
Subject(s) - liquidus , solidus , phase diagram , spinodal decomposition , thermodynamics , diagram , materials science , phase (matter) , chemistry , metallurgy , mathematics , physics , statistics , organic chemistry , alloy
Venezuelan Institute of Scientific Research and School of Metallurgical Engineering and Materials Science, Central University of Venezuela (UCV), Apartado 51717, Caracas 1050‐A, Venezuela The complete phase diagram of the binary system MnO‐NiO was analytically calculated using the pseudosimpler thermo‐dynamic solution model based on the available experimental activity data. The system exhibits a symmetrical subsolidus miscibility gap with its critical temperature at Tc=386.8°C. The possible spinodal curve is also calculated. The solidus and liquidus reveal complete mutual solubilities between the end components at high temperature. The solidus is a continuously sloping monotonic curve but the liquidus is skewed and concave upward near the MnO end. An explanation of the effect of the cationic size differences on the characteristics of phase relations of similar binary systems formed between the NaCl‐type divalent monoxides is proposed.