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Electrophoretic Deposition of Sol-Gel-Derived Ceramic Coatings

Published online by Cambridge University Press:  25 February 2011

Yining Zhang ,
C. Jeffrey Brinker  and
Richard M. Crooks
Yining Zhang
Affiliation:
Department of Chemistry and UNM/NSF Center for Micro-Engineered Ceramics, University of New Mexico, Albuquerque, NM.
C. Jeffrey Brinker
Affiliation:
Center for Micro-Engineered Ceramics, University of New Mexico, Albuquerque, NM, and Sandia National Laboratories, Albuquerque, NM.
Richard M. Crooks
Affiliation:
Department of Chemistry and UNM/NSF Center for Micro-Engineered Ceramics, University of New Mexico, Albuquerque, NM.
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Abstract

The physical, optical, and chemical characteristics of electrophoretically- and dip-coated sol-gel ceramic films are compared. The results indicate that electrophoresis may allow a higher level of control over the chemistry and structure of ceramic coatings than dip-coating techniques. For example, controlled-thickness sol-gel coatings can be prepared by adjusting the deposition time or voltage. Additionally, electrophoretic coatings prepared in a four-component alumino-borosilicate sol display interesting optical characteristics. For example, the ellipsometrically-measured refractive indices of electrophoretic coatings are higher than the refractive indices of dip-coated films cast from identical sols, and they are also higher than any of the individual sol components. This result suggests that there are physical and/or chemical differences between films prepared by dip-coating and electrophoresis.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 271: Symposium N – Better Ceramics Through Chemistry V , 1992 , 465
Copyright
Copyright © Materials Research Society 1992

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References

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