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- Title
Cation Distribution in the Composite Materials of the CaFe<sub>2</sub>O<sub>4</sub>-α-Fe<sub>2</sub>O<sub>3</sub> Series.
- Authors
Knyazev, Yu. V.; Shishkina, N. N.; Bayukov, O. A.; Kirik, N. P.; Solovyov, L. A.; Zhizhaev, A. M.; Rabchevsky, E. V.; Anshits, A. G.
- Abstract
Structured composite materials CaFe2O4-α-Fe2O3 (α-Fe2O3 content is 2–82 wt.%) are obtained with the method of solid-phase synthesis at 1000 °C. The phase composition of the samples is studied using powder X-ray diffraction. It is shown that the content of CaFe2O4 and α-Fe2O3 phases changes linearly, depending on the composition of the starting material. The scanning electron microscopy data indicate the formation of a two-phase system α-Fe2O3-CaFe2O4. The Mössbauer spectroscopy data at room temperature testify the formation of cationic iron vacancies in the CaFe2O4 crystal structure in the absence of α-Fe2O3 structural defects. Cationic vacancies can be formed during the synthesis in the atmosphere of air.
- Subjects
COMPOSITE materials; SOLID-phase synthesis; MOSSBAUER spectroscopy; VACANCIES in crystals; X-ray powder diffraction; IRON powder
- Publication
Journal of Structural Chemistry, 2019, Vol 60, Issue 5, p763
- ISSN
0022-4766
- Publication type
Article
- DOI
10.1134/S0022476619050081