Peculiarities of Phase Formation
in Al₂O₃CeO₂ Nanopowders

L. I. Podzorova, A. A. Il’yicheva, O. I. Pen’kova, and L. I. Shvorneva

Baykov Institute of Metallurgy and Material Engineering, Russian Academy of Sciences,
Leninskii pr., 49, Moscow, 119991 Russia

e-mail: podzorova@pochta.ru

Received June 28, 2013

Abstract—The results of the investigations on the influence of CeO₂ adding on the transformation of the meta-
stable Al₂O₃ forms obtained by thermal treatment of xerogels are presented. It is established that in the presence
of CeO₂ the process of the formation of a stable phase of -Al₂O₃ (corundum) takes place in a wider tempera-
ture range and is accomplished at a higher temperature (1300C). It is suggested that the revealed mismatches
on the diffractograms between the intensity values of the main analytical peaks of the corundum and its content
in the samples are associated with the effect of screening caused by the differences in the mass coefficients of
absorption of () CeO₂ and Al₂O₃.

Keywords: nanopowders, phase formation, aluminum oxide, cerium dioxide

DOI: 10.1134/S1087659614050125

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