| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Thermodynamics of Materials in Extreme Environments
|
| Presentation Title |
Energetics of Fe3O4 – FeAl2O4 Spinel Solid Solution |
| Author(s) |
Alexandra Navrotsky |
| On-Site Speaker (Planned) |
Alexandra Navrotsky |
| Abstract Scope |
High temperature oxide melt solution calorimetry has been used to elucidate the energetics of Fe3O4 – FeAl2O4 solid solution. Conventional solid state reactions from constituent oxides were utilized to synthesize Fe(Al1-xFex)2O4 spinels. Due to oxygen sensitive Fe2+ in the spinel structure, the samples were synthesized under argon flow to minimize the oxidation during the synthesis. The enthalpies of formation from constituent oxides (ΔH°f,ox) and elements of the end members and the solid solutions were calculated from the drop solution enthalpies. The enthalpies of mixing of the Fe(Al1-xFex)2O4 system and the solvus were determined and the data will provide input for future CALPHAD assessments. |