Formation and Annealing of Micropores in Hematite

C. Dauwe, G.M. Da Costa, T. Van Hoecke, D. Segers
1995 Acta Physica Polonica. A  
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-Fe2 O3 . 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 fatcat:6dazc6jyvfan7dzgpsladdstey