Thermodynamic Properties of Fe₃O₄‐FeAl₂O4 Spinel Solid Solutions Journal Articles

abstract

• The Gibbs energy of mixing for the system Fe3O4‐FeAl2O4 was determined at 1573 K using a gas‐metal‐oxide equilibration technique. Oxide solid solution samples were equilibrated with Pt foils under controlled CO+CO2 gas streams. The equilibrium iron concentration in the foil was determined by chemical analysis. The cation distribution between tetrahedral and octahedral sites in the spinel crystal can be calculated from site‐preference energies and used as an alternate method of determining some thermodynamic properties, including the Gibbs energy of mixing. The solvus occurring at low temperatures in the system Fe3C4‐FeAl2C4 was used to derive the effect of lattice distortion due to cation size difference on the enthalpy of mixing and to obtain a better approximation to the measured thermodynamic quantities.

authors

• Petric, Anthony
• JACOB, KT
• ALCOCK, CB

status

• published 

publication date

• November 1981

has subject area

• 0912 Materials Engineering (FoR)
• 0913 Mechanical Engineering (FoR)
• Materials (Science Metrix)

published in

• Journal of The American Ceramic Society  Journal

keywords

• Materials Science
• Materials Science, Ceramics
• Science & Technology
• Technology

Digital Object Identifier (DOI)

• 10.1111/j.1151-2916.1981.tb15860.x

start page

• 632

end page

• 639

volume

• 64

issue

• 11