An experimental study of magnetite-titanomagnetite interdiffusion

Details An experimental study of magnetite-titanomagnetite interdiffusion An experimental study of magnetite-titanomagnetite interdiffusion

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pepi...16..223f&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 16, Issue 3, p. 223-231.

Physics

8

Scientific paper

Interdiffusion experiments were performed between Fe3O4 (single crystal) and Fe2.8Ti0.2O4 (powder), under self-buffering conditions (temperature range 600-1034°C), and for various oxygen potentials at 1400°C. Profiles of Fe and Ti were obtained by electronprobe microanalysis, and the interdiffusion coefficient D was calculated by the Boltzmann-Matano method. Low-temperature data at 3 mole% Ti could be described by D = (3.85-1.11+1.68) × 10-3 exp(2.23 +/- 0.04 eV/kT) cm2/s. An estimate is given for the time to interdiffuse 2μm at various temperatures, and the results compared with recent experiments. Present address: Department of Chemistry, University of Durham, Science Laboratories, South Road, Durham DH1 3LE, Great Britain.

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