Assessment of dissociation rate of FeCr2O4 using the Bjerrum-Guggenheim coefficient

Abstract

A calculation procedure of line positions of the monovariant phase equilibrium for the crystallization regions of a congruent compound using the osmotic coefficient of Bjerrum-Guggenheim (ɸ’ Am Bn) was developed. The relevant mathematical apparatus for an analytical description of lines and surfaces of the phase crystallization was recommended. As an example of FeO-Cr2O3 oxide system, the assessment of dissociation rate of congruent compound of FeCr2O4 was performed. The demonstration material of behavior of the osmotic coefficient of Bjerrum-Guggenheim under boundary conditions as assessment criterion of melt structurewas presented.

Keywords

• FeO-Cr₂O₃ system
• phase diagrams
• crystallization
• dissociation rate
• Bjerrum-Guggenheim coefficient