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Effect of Polymerization of Precursor Solutions on Crystallization and Morphology of Ce0.9Gd0.1O1.95 Powders

Published online by Cambridge University Press:  18 March 2011

Shuqiang Wang ,
Masanobu Awano  and
Kunihiro Maeda
Shuqiang Wang
Affiliation:
Synergy Ceramics Laboratory, Fine Ceramics Research Association, Shidami Human Science Park, Shimo-Shidami, Moriyama-ku, Nagoya 463-8687, Japan
Masanobu Awano
Affiliation:
Synergy Ceramics Laboratory, Fine Ceramics Research Association, Shidami Human Science Park, Shimo-Shidami, Moriyama-ku, Nagoya 463-8687, Japan
Kunihiro Maeda
Affiliation:
Synergy Ceramics Laboratory, Fine Ceramics Research Association, Shidami Human Science Park, Shimo-Shidami, Moriyama-ku, Nagoya 463-8687, Japan
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Abstract

Synthesis of Ce0.9Gd0.1O1.95 (CGO) powders from polymeric precursor solutions formed by mixing nitrates and ethylene glycol at 60-85 was investigated with emphasis on the effect of the polymerization of the precursor solution on the crystallization and morphology of the derived intermediate and the resultant oxide powders. It was revealed by FTIR that the molecular structures of the polymeric precursor solution change from aldehyde or ketone groups to carboxylic acid and carboxylate groups with increasing heating time. TG-DTA analyses demonstrated the temperature shifting and the disappearance of the exothermic reactions of the derived powders with different heating times of the polymeric precursor solutions. Furthermore, it was identified by XRD, SEM and TEM that the derived powders can be changed from well crystallized organic formates of Ce1-xGdx(HCOO)3 with dendritic growth to loose agglomerated cubic CGO powders with grain sizes below 10 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 658: Symposium GG – Solid-State Chemistry of Inorganic Materials III , 2000 , GG6.1
Copyright
Copyright © Materials Research Society 2001

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References

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