Corrosion related iron oxides: Cu, Mn and Cr doped hematite
DOI:
https://doi.org/10.3989/revmetalm.2003.v39.iExtra.1099Keywords:
Mössbauer spectroscopy, Thermal treatment, Goethite, Hematite, X-ray diffraction, Hyperfine parametersAbstract
We have obtained Cu, Mn, and Cr doped hematites, by a thermal treatment of doped goethites at 500 and 880 °C in air for 24 h. The goethites were prepared in the laboratory from iron chloride solutions in the presence of Cu2+, Mn2+, and Cr3+ ions. The samples are characterized by Mössbauer spectroscopy and X-ray diffraction. It is found that at 500 °C all the goethites have transformed into hematites. However, the thermal treatment at 880 °C produces hematites with better crystallinity.
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