Synthesis of La0.8Sr0.2CoO3 by sol-gel type reaction modified by poly (vinyl alcohol)

A single-phase polycrystalline La0.8Sr0.2CoO3 with a high surface area at low temperature (greater than 600 C) was successfully synthesised by a sol-gel type route which was modified by using PVA as a gelling agent. The synthesised powder was examined using XRD and the BET method. Pyrolysis of the g...

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Bibliographic Details
Published in:Journal of materials science letters 1996-03, Vol.15 (5), p.428-430
Main Authors: Kweon, Ho-Jin, Kuk, Seung-Taek, Park, Hyu-Bum, Park, Dong Gon, Kim, Keon
Format: Article
Language:English
Subjects:
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
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Summary:A single-phase polycrystalline La0.8Sr0.2CoO3 with a high surface area at low temperature (greater than 600 C) was successfully synthesised by a sol-gel type route which was modified by using PVA as a gelling agent. The synthesised powder was examined using XRD and the BET method. Pyrolysis of the gel precursor was observed by TGA. It was shown that the synthesised LSCO exhibited a slightly denatured crystal structure and that the extent of the structural shift (cubic-rhombohedral) was dependent on the amount of PVA used for the preparation of gel precursors. 21 refs.
ISSN:0261-8028
1573-4811
DOI:10.1007/BF00277188