Cation Distribution in the Composite Materials of the CaFe2O4-α-Fe2O3 Series


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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.

About the authors

Yu. V. Knyazev

Kirensky Institute of Physics, Federal Krasnoyarsk Research Center, Siberian Branch

Author for correspondence.
Email: yuk@iph.krasn.ru
Russian Federation, Krasnoyarsk

N. N. Shishkina

Institute of Chemistry and Chemical Technology, Federal Krasnoyarsk Research Center, Siberian Branch

Email: yuk@iph.krasn.ru
Russian Federation, Krasnoyarsk

O. A. Bayukov

Kirensky Institute of Physics, Federal Krasnoyarsk Research Center, Siberian Branch

Email: yuk@iph.krasn.ru
Russian Federation, Krasnoyarsk

N. P. Kirik

Institute of Chemistry and Chemical Technology, Federal Krasnoyarsk Research Center, Siberian Branch

Email: yuk@iph.krasn.ru
Russian Federation, Krasnoyarsk

L. A. Solovyov

Institute of Chemistry and Chemical Technology, Federal Krasnoyarsk Research Center, Siberian Branch

Email: yuk@iph.krasn.ru
Russian Federation, Krasnoyarsk

A. M. Zhizhaev

Institute of Chemistry and Chemical Technology, Federal Krasnoyarsk Research Center, Siberian Branch

Email: yuk@iph.krasn.ru
Russian Federation, Krasnoyarsk

E. V. Rabchevsky

Institute of Chemistry and Chemical Technology, Federal Krasnoyarsk Research Center, Siberian Branch

Email: yuk@iph.krasn.ru
Russian Federation, Krasnoyarsk

A. G. Anshits

Institute of Chemistry and Chemical Technology, Federal Krasnoyarsk Research Center, Siberian Branch

Email: yuk@iph.krasn.ru
Russian Federation, Krasnoyarsk

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