Element partitioning at reaction interfaces in a reactive diffusion setting
- Author(s)
- Rainer Abart, Jiri Svoboda, Petr Jeřabek, Erwin Povoden-Karadenitz, Gerlinde Habler
- Abstract
We report on experimental layer growth of magnesio aluminate spinel (MgAl2O4) at periclase (MgO) corundum (Al2O3) interfaces. Periclase and corundum were contacted and annealed at 1350°C and ambient pressure for 5 to 160 hours. Along the contact a spinel layer formed showing parabolic growth. The spinel exhibits monotonic decrease in Al content from the spinel-corundum interface to the spinel-periclase interface. Whereas the Al-content of spinel is constantly about one mole percent above the equilibrium composition at the spinel-periclase interface, the Al-content of spinel increases with run duration approaching but never attaining local equilibrium at the spinel-corundum interface. Based on these experimental data the kinetic parameters describing long-range diffusion and interface motion in a thermodynamic model are calibrated.
- Organisation(s)
- Department of Lithospheric Research
- External organisation(s)
- Czech Academy of Sciences, Charles University Prague, Technische Universität Wien
- Pages
- 353-354
- No. of pages
- 2
- Publication date
- 2015
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105120 Petrology
- Keywords
- ASJC Scopus subject areas
- Chemical Engineering(all), Inorganic Chemistry, Materials Chemistry, Metals and Alloys
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/element-partitioning-at-reaction-interfaces-in-a-reactive-diffusion-setting(b71a3de4-a978-43d4-842d-2258485e8541).html