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Liquid-Mix Synthesis of Oxide Powders and Thin Films Using A Starch-Based Polymer

Published online by Cambridge University Press:  21 February 2011

Lone-Wen F. Tai  and
Harlan U. Anderson
Lone-Wen F. Tai
Affiliation:
University of Missouri-Rolla, Ceramic Engineering Department Rolla, Missouri 65401
Harlan U. Anderson
Affiliation:
University of Missouri-Rolla, Ceramic Engineering Department Rolla, Missouri 65401
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Abstract

A commercially available water-soluble starch derivative was used as the sole organic precursor in the Liquid-Mix synthesis of mixed-cation oxide powders and thin films. The acidified polymer (by nitric acid) was able to complex metal ions through the carboxylate ligands. Loosely agglomerated fine powders as well as dense thin films of complex oxides have been prepared using the same type of polymer. Oxide powders of Cr-doped lanthanum aluminate and yttrium aluminum garnet both crystallized in a single step, without forming any intermediate or second phases, when the amorphous resin intermediates were calcined at 650°C and 750°C for 2 hours, respectively. It was demonstrated that nitric acid could effectively reduce the viscosity of the polymer-nitrate solution to make it suitable for spin coating process. Dense thin films of Y(8 mol%)-doped ZrO2 were formed on Si and A12O3 substrates by spin coating the polymeric solution and heating at temperatures below 1000°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 109
Copyright
Copyright © Materials Research Society 1998

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References

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