Determination of Chromium Oxidation States in Part of the System CaO─3CaO · Cr2O3 in Air
- 1 August 1992
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 75 (8) , 2184-2188
- https://doi.org/10.1111/j.1151-2916.1992.tb04481.x
Abstract
The aim of the present work was to identify the structural characteristics of calcium chromium oxide formed at molar ratios CaO/Cr2O3≥ 3/1 and at elevated temperatures by the use of nondestructive techniques: instrumental neutron activation analysis (for determination of the total chromium content), electron paramagnetic resonance, magnetic susceptibility (for determination of chromium oxidation states), X‐ray diffraction, and scanning electron microscopy. Our results suggest formation of the 3CaO · Cr2O5 compound, while at larger molar ratios only a small portion of Cr is incorporated into the crystalline CaO lattice as paramagnetic Cr3+.Keywords
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