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Stabilization and transformation of the phases in nanostructured irconia prepared by wet chemical synthesis route

Published online by Cambridge University Press:  10 February 2011

T. D. Xiaol ,
X. Bokhimi ,
A. Garcia-Ruiz ,
A. Morales ,
D. M. Wang ,
H. Chen  and
P. R. Struttl
T. D. Xiaol
Affiliation:
Inframat Corporation, 20 Washington Avenue, Suite 106, North Haven, CT 06473, USA.
X. Bokhimi
Affiliation:
Institute of Physics, National University of Mexico (UNAM) A.P. 20-364, 01000, Mexico
A. Garcia-Ruiz
Affiliation:
UPIICSA-National Polytechnical Institute (IPN), Resina, Mexico, MEXICO.
A. Morales
Affiliation:
Institute of Physics, National University of Mexico (UNAM) A.P. 20-364, 01000, Mexico
D. M. Wang
Affiliation:
Inframat Corporation, 20 Washington Avenue, Suite 106, North Haven, CT 06473, USA.
H. Chen
Affiliation:
Precision Manufacturing Center, PMC, University of Connecticut, Storrs, CT 06269, USA.
P. R. Struttl
Affiliation:
Inframat Corporation, 20 Washington Avenue, Suite 106, North Haven, CT 06473, USA.
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Abstract

Nanostructured yttrium stabilized zirconia powders with yttria concentrations between 0.0 and 10.0 mol % were prepared via an aqueous chemical synthesis route. This synthesis involved the spray atomization of the aqueous solution mixture of zirconyl chloride and yttrium chloride into a reaction vessel that contained a diluted ammonium hydroxide, followed by ultrasonication, separation and heat treatment. These powders were characterized using SEM, TEM, XRD, and chemical analysis. The crystalline structure was refined using the Rietveld technique. At temperatures below 200 °C, the powders were amorphous solid solutions with an structure independent of yttria concentration, where yttrium atoms occupied the zirconium positions in the zirconyl group, e.g., (Zr4(1-x) Y4x(OH)8(OH2)16)(8-4x)+. Annealing the sample at 400 °C, the amorphous phases crystallized into monoclinic, tetragonal or cubic nanocrystalline zirconia, depending on yttria concentration, where the non-doped samples had a mixture of monoclinic and tetragonal phases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 501: Symposium FF – Surface Controlled Nanoscale Materials for High-Added… , 1997 , 261
Copyright
Copyright © Materials Research Society 1998

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References

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