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Microstructural Evolution of Epitaxial LiNbO3 Thin Films Derived From Metal Alkoxide Solutions

Published online by Cambridge University Press:  25 February 2011

Keiichi Nashimoto ,
Michael J. Cima  and
Wendell E. Rhine
Keiichi Nashimoto
Affiliation:
On leave from Fuji Xerox Co., Ltd., 3–3–5, Akasaka, Tokyo, JAPAN
Michael J. Cima
Affiliation:
Ceramics Processing Research Laboratory MassachusettsInstitute of TechnologyCambridge, MA 02139
Wendell E. Rhine
Affiliation:
Ceramics Processing Research Laboratory MassachusettsInstitute of TechnologyCambridge, MA 02139
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Abstract

The evolution of the microstructure of sol-gel derived LiNbO3 thin films was investigated to understand the growth of epitaxial films. LiNbO3 films were prepared from a precursor solution of lithium ethoxide and niobium pentaethoxide. Prehydrolysis promoted the development of polycrys-talline LiNbO3 films, whereas nonhydrolysis produced solid-state epitaxial growth of LiNbO3 films on sapphire substrates. Although the films looked smooth after annealing at 400°C, the morphology of the films changed, depending on substrates and precursors, due to grain growth at high annealing temperature. Prehydrolysis of the alkoxides caused a decrease in the temperature at which grain growth occurred, whereas the film prepared from the nonhydrolyzed precursor on a sapphire substrate showed denser texture and contained abnormally large domains that appeared to be single phase.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 202: Symposium C – Evolution of Thin Film and Surface Microstructure , 1990 , 439
Copyright
Copyright © Materials Research Society 1991

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References

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