Navegando por Autor "Van Hoecke, T."

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    Formation and annealing of micropores in hematite.
    (1995) Dauwe, C.; Costa, Geraldo Magela da; Van Hoecke, T.; Segers, D.
    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.