Formation and Annealing of Micropores in Hematite |
| C. Dauwe, G.M. Da Costa, T. Van Hoecke and D. Segers Section Subatomic and Radiation Physics, University of Gent, Proeftuinstraat 86, 9000 Gent, Belgium |
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| In iron oxide powders positrons are trapped in the surface layers and the value of the S-parameter is an indicator of the total specific surface, including external surface and internal surfaces of micropores. The evolution of micropores is followed when α-FeOOH is thermally decomposed into α-Fe2O3. It is shown that the micropore formation is not linked to the decomposition process, but that they also form in hematite synthesized from a ferrihydrite precursor in aqueous solution. |
| DOI: 10.12693/APhysPolA.88.119 PACS numbers: 78.70.Bj |