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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access August 11, 2008

Sol-gel preparation and characterization of non-substituted and Sr-substituted lanthanum cobaltates

Sigute Cizauskaite EMAIL logo and Aivaras Kareiva
From the journal Open Chemistry

Abstract

This paper reports on the results concerning the sol-gel preparation and characterization of Sr-substituted perovskite lanthanum cobaltates La1−xSrxCoO3−δ (x = 0.0, 0.25, 0.5 and 0.75). The metal ions, generated by dissolving starting materials in diluted acetic acid were complexed by 1,2-ethanediol to obtain the precursors for the non-substituted and Sr-substituted LaCoO3. The influence of the synthesis temperature, heating time and the amount of substituent on the phase purity of La1−xSrxCoO3−δ were investigated. The phase transformations, composition and micro-structural features in the gels and polycrystalline samples were studied by thermal analysis (TG/DTA), infrared spectroscopy (IR), powder X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM).

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Published Online: 2008-8-11
Published in Print: 2008-9-1

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