Cation ordering and order–disorder phase transitionin Co-substituted Li4Ti5O12 spinels
2003; Wiley; Volume: 198; Issue: 1 Linguagem: Inglês
10.1002/pssa.200306451
ISSN1521-396X
AutoresN. Jović, Bratislav Antić, Aleksandar Kremenović, Anne Spasojević-de Biré, Vojislav Spasojević,
Tópico(s)Nuclear materials and radiation effects
Resumophysica status solidi (a)Volume 198, Issue 1 p. 18-28 Original Paper Cation ordering and order–disorder phase transitionin Co-substituted Li4Ti5O12 spinels N. Jovic, N. Jovic Institute of Nuclear Sciences "Vinca", Laboratory of Solid State Physics, PO Box 522, 11001 Belgrade, YugoslaviaSearch for more papers by this authorB. Antic, Corresponding Author B. Antic bantic@vin.bg.ac.yu Institute of Nuclear Sciences "Vinca", Laboratory of Solid State Physics, PO Box 522, 11001 Belgrade, YugoslaviaPhone: +381 11 8065828; Fax: +381 11 3440100Search for more papers by this authorA. Kremenovic, A. Kremenovic Ecole Centrale Paris, Laboratoire SPMS, UMR CNRS 8580, 1 Grande Voie des Vignes, 92295 Chatenay-Malabry Cedex, FranceSearch for more papers by this authorA. Spasojevic-de Bire, A. Spasojevic-de Bire Ecole Centrale Paris, Laboratoire SPMS, UMR CNRS 8580, 1 Grande Voie des Vignes, 92295 Chatenay-Malabry Cedex, FranceSearch for more papers by this authorV. Spasojevic, V. Spasojevic Institute of Nuclear Sciences "Vinca", Laboratory of Solid State Physics, PO Box 522, 11001 Belgrade, YugoslaviaSearch for more papers by this author N. Jovic, N. Jovic Institute of Nuclear Sciences "Vinca", Laboratory of Solid State Physics, PO Box 522, 11001 Belgrade, YugoslaviaSearch for more papers by this authorB. Antic, Corresponding Author B. Antic bantic@vin.bg.ac.yu Institute of Nuclear Sciences "Vinca", Laboratory of Solid State Physics, PO Box 522, 11001 Belgrade, YugoslaviaPhone: +381 11 8065828; Fax: +381 11 3440100Search for more papers by this authorA. Kremenovic, A. Kremenovic Ecole Centrale Paris, Laboratoire SPMS, UMR CNRS 8580, 1 Grande Voie des Vignes, 92295 Chatenay-Malabry Cedex, FranceSearch for more papers by this authorA. Spasojevic-de Bire, A. Spasojevic-de Bire Ecole Centrale Paris, Laboratoire SPMS, UMR CNRS 8580, 1 Grande Voie des Vignes, 92295 Chatenay-Malabry Cedex, FranceSearch for more papers by this authorV. Spasojevic, V. Spasojevic Institute of Nuclear Sciences "Vinca", Laboratory of Solid State Physics, PO Box 522, 11001 Belgrade, YugoslaviaSearch for more papers by this author First published: 19 May 2003 https://doi.org/10.1002/pssa.200306451Citations: 21AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract In this paper we present the results of the synthesis, crystal structure investigations and in situ X-ray diffraction studies of the order–disorder phase transition in cobalt substituted lithium titanate oxide spinels, Li1.33xCo2–2xTi1+0.67xO4 (0 ≤ x ≤ 1). Depending on the chemical composition the samples crystallize in two space groups (S.G.): (0 ≤ x ≤ 0.40 and x = 1) and P4332 (0.50 ≤ x ≤ 0.875). Samples crystallizing in the S.G. P4332 are ordered spinels with a cation ordering of the 1–3 type at octahedral 4b and 12d sites. The cation ordering in octahedral sites is full in the sample with x = 0.75 (Li and Ti occupy 4b and 12d sites, respectively) and decreases for samples with higher/smaller x. Changes of the extinction conditions and nonlinearities in the concentration dependence of the lattice parameter in the regions 0.40 < x < 0.50 and 0.875 < x < 1 indicate changes of the crystal symmetry ( ⟷ P4332). The partially ordered spinel x = 0.50 has a convergent, reversible, order–disorder phase transition at TC = (1083 ± 10) K. Samples with x = 0.875 and 0.75 have an order–disorder phase transition out of our experimental ranges with TC(x = 0.875) < 973 K and TC(x = 0.75) > 1173 K. The mechanism of the phase transition is based on cation migration. Citing Literature Volume198, Issue1July 2003Pages 18-28 RelatedInformation
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