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Formation and Annealing of Micropores in Hematite

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Dauwe C., Da Costa G. M., Van Hoecke T., Segers D.
Acta Physica Polonica A
|
1995
|
vol. 88
|
issue 1
119-123
EN
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-Fe_{2}O_{3}. 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.
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