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Strontium and calcium zirconyl citrates as precursors for the low-temperature synthesis of SrZrO3 and CaZrO3 fine powders

Published online by Cambridge University Press:  31 January 2011

M. Rajendran  and
M. Subba Rao
M. Rajendran
Affiliation:
Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India
M. Subba Rao
Affiliation:
Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India
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Abstract

Synthesis and the thermal decomposition behavior of new molecular precursors, strontium, and calcium zirconyl citrates are presented. The pathway to the metazirconate formation has been found to proceed through a multistep process. The precursors yield SrZrO3 and CaZrO3 fine powders at temperatures as low as 650 °C. Physico-chemical, spectroscopic, thermoanalytical, and microscopic techniques have enabled the identification of the sequence of events leading to the perovskite formation and proposition of a thermolysis scheme. Retention of the molecular level mixing of the metal ions during the course of the precursor decomposition is supported by these techniques. Prior to the formation of MZrO3 (M = Sr and Ca) an ionic oxycarbonate, M2Zr2O5CO3 (M = Sr and Ca), intermediate is produced by the thermal decomposition of the citrate precursors.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 10 , October 1997 , pp. 2665 - 2672
Copyright
Copyright © Materials Research Society 1997

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References

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