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Alkoxide Based Sol-Gel Processing of CMR Manganites

Published online by Cambridge University Press:  01 February 2011

Annika Pohl  and
Gunnar Westin
Annika Pohl
Affiliation:
Department of Materials Chemistry, Ångström Laboratory, Uppsala University, 751 21 Uppsala, Sweden.
Gunnar Westin
Affiliation:
Department of Materials Chemistry, Ångström Laboratory, Uppsala University, 751 21 Uppsala, Sweden.
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Abstract

We have prepared a soluble manganese alkoxide, and used in the first all-alkoxide synthesis of Ca, Sr, and Ba substituted lanthanum manganites. The phase development from gel to target oxide was monitored by TGA, DSC, powder-XRD, FT–IR spectroscopy, and TEM-EDS. Here we present the effect of dopant on the phase development. It was found that the dopants influence the temperature of complete oxide formation (≥650°C). The main difference in phase evolution was seen in the 300–600°C range, where the formation of crystalline phases in trace quantities seemed to temporarily reduce the elemental homogeneity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 848: Symposium FF – Solid-State Chemistry of Inorganic Materials V , 2004 , FF10.6
Copyright
Copyright © Materials Research Society 2005

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References

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