Journal of Phase Equilibria

Journal: Journal of Phase Equilibria

J. phase equilibria

ASM International

1054-9714
1544-1032

Publications 1 - 2 of 2

Assessment of the Mn-O system
Grundy, A. Nicholas; Hallstedt, Bengt; Gauckelr, Ludwig J. (2003)
Journal of Phase Equilibria
Experimental data on the thermodynamics and the phase diagram of the Mn-O system were reviewed, and by application of the CALPHAD method, a consistent set of thermodynamic model parameters was optimized. The phases pyrolusite (MnO2), bixbyite (Mn2O3), and hausmannite (Mn3O4) were described as stoichiometric compounds. Manganosite (Mn1−xO) was described using the compound-energy model and the liquid described using the two-sublattice model for ionic liquids.
Thermodynamic assessment of the Co-O system
Chen, Ming; Hallstedt, Bengt; Gauckler, Ludwig J. (2003)
Journal of Phase Equilibria
The thermodynamic properties of CoO, Co3O4, and the liquid phase were assessed, and an optimized set of parameters of Gibbs energy functions is proposed. The two stable solid oxides, CoO and Co3O4, were both treated as stoichimetric compounds. The paramagneticantiferromagnetic transition of CoO is well represented by a magnetic ordering model. The Co3O4 spinel phase was described as a normal spinel at room temperature and with cation redistribution at high temperatures. A high-temperature anomaly of Co3O4 was interpreted as a normal-inverse spinel transition. An ionic two-sublattice model was used to model the liquid phase. A calculated phase diagram is presented, and values for the thermodynamic properties are compared with experimental data.

Publications 1 - 2 of 2