New anion-deficient cubic perovskites: Ba2In1 - xCo1 + xO5 + δ (0 ≤ x ≤ 0.8) and Ba2 - xLaxCoInO5 + δ (0.2 ≤ x ≤ 0.8)

S. Ya Istomin, V. A. Koutcenko, E. V. Antipov, G. Svensson, J. P. Attfield

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10 Citations (Scopus)

Abstract

The new compound Ba2InCoO5 + δ, which has a cubic perovskite structure (a = 4.1587(3) Å) at high temperatures, was prepared by heating mixtures of BaCO3, In2O3 and Co3O4 in air at 1150°C for 20 h. Heat treatment of Ba2InCoO5 + δ in air at 850°C for 72 h revealed a phase transformation into a brownmillerite-type structure. To stabilize a cubic perovskite phase at moderate temperatures, the solid solutions Ba2In1 - x- Co1 + xO5 + δ, 0 ≤ x ≤ 0.7 and Ba2 - xLaxCoInO5 + δ, 0 ≤ x ≤ 0.8 were prepared. X-Ray diffraction revealed that the cubic perovskite structure is stable only for Ba2In1 - xCo1 + xO5 + δ, 0.4 ≤ x ≤ 0.6 and Ba1.2La0.8CoInO5 + δ, Ba1.4La0.6CoInO5 + δ upon heat treatment in air at 850°C for 72 h.

Original languageEnglish
Pages (from-to)2352-2355
Number of pages4
JournalJournal of Materials Chemistry
Volume12
Issue number8
DOIs
Publication statusPublished - Aug 2002
Externally publishedYes

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