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Liquid-Mix Synthesis of Oxide Powders and Thin Films Using AStarch-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 thesole organic precursor in the Liquid-Mix synthesis of mixed-cation oxidepowders and thin films. The acidified polymer (by nitric acid) was able tocomplex metal ions through the carboxylate ligands. Loosely agglomeratedfine powders as well as dense thin films of complex oxides have beenprepared using the same type of polymer. Oxide powders of Cr-doped lanthanumaluminate and yttrium aluminum garnet both crystallized in a single step,without forming any intermediate or second phases, when the amorphous resinintermediates were calcined at 650°C and 750°C for 2 hours, respectively. Itwas demonstrated that nitric acid could effectively reduce the viscosity ofthe 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 polymericsolution and heating at temperatures below 1000°C.

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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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