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Issue 3, 2003
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Microwave preparation and sintering of industrially important perovskite oxides: LaMO3(M = Cr, Co, Ni)

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Abstract

Perovskite oxides LaMO3 (M = Cr, Co, Ni), have been successfully prepared using microwaves of 2.45 GHz. Microwave preparation is rapid, clean and energy efficient. Preparation of LaCrO3, LaCoO3 and LaNiO3 has been achieved in 3 min, 5 min and 10 min respectively. Direct reaction between component oxides is used for the preparation of LaCrO3 and LaCoO3, whereas nitrates are used as starting materials for LaNiO3 preparation. Products have been characterized using XRD, IR spectroscopy and SEM. Their dc electrical conductivity has also been studied and their fracture behaviour has been examined. All three microwave prepared oxide powders are of submicron size. These perovskite oxides have been sintered to very high densities using microwaves. Possible mechanisms of the microwave–material interaction both during preparation and during sintering have been discussed.

Graphical abstract: Microwave preparation and sintering of industrially important perovskite oxides: LaMO3 (M = Cr, Co, Ni)

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Publication details

The article was received on 26 Nov 2002, accepted on 06 Jan 2003 and first published on 21 Jan 2003


Article type: Paper
DOI: 10.1039/B211602B
Citation: J. Mater. Chem., 2003,13, 596-601
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    Microwave preparation and sintering of industrially important perovskite oxides: LaMO3 (M = Cr, Co, Ni)

    M. Panneerselvam and K. J. Rao, J. Mater. Chem., 2003, 13, 596
    DOI: 10.1039/B211602B

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