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Formation of Pb(Ti,Zr)O3, from thermal decomposition of oxalate precursors

Balachandran, R and Kutty, TRN (1984) Formation of Pb(Ti,Zr)O3, from thermal decomposition of oxalate precursors. In: Materials Chemistry and Physics, 10 (3). pp. 287-298.

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Abstract

Lead zir conyl oxalate hexahydrate (LZO) and lead titanyl zirconyl oxalate hydrate (LTZO) are prepared and characterized. Their thermal decompositions have been investigated by thermoanalytical and gas analysis techniques. The decomposition in air or oxygen has three steps — dehydration, decomposition of the oxalate to a carbonate and the decomposition of carbonate to PbZrO3. In non oxidising atmosphere, partial reduction of Pb(II) to Pb(0) takes place at the oxalate decomposition step. The formation of free metallic lead affects the stoichiometry of the intermediate carbonate and yields a mixture of Pb(Ti,Zr)O3 and ZrO2 as the final products. By maintaining oxidising atmosphere and low heating rate, direct preparation of stoichiometric, crystalline Pb(Ti,Zr)O3 at 550°C is possible from the corresponding oxalate precursor.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elsevier science.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 28 Jan 2010 09:42
Last Modified: 19 Sep 2010 05:47
URI: http://eprints.iisc.ernet.in/id/eprint/23880

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