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Title: Electrophoretic deposition (EPD): Mechanisms, kinetics, and application to ceramics

Abstract

The mechanisms of electrophoretic deposition (EPD) are discussed and their shortcomings identified. The kinetics of the processes involved are analyzed for constant-current and constant-voltage conditions. A method of determining the Hamaker constant of suspended particles is developed by modeling the relationship between the particle interaction energy and the suspension stability. A three-probe dc technique is used to map the voltage profile around the depositing electrode, and the results are used to explain discrepancies between the calculated and experimentally observed voltage drops during deposition. A mechanism of deposition is proposed based on DLVO theory and particle double-layer distortion/thinning on application of a dc field to the suspension. Kinetic equations are developed for constant-current and constant-voltage EPD using mass balance conditions; these are verified by experiments. After the phenomenon is introduced and discussed, a critique of the application of EPD to the synthesis of ceramic shapes and coatings is given.

Authors:
;  [1]
  1. McMaster Univ., Hamilton, Ontario (Canada)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
382450
Resource Type:
Journal Article
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 79; Journal Issue: 8; Other Information: PBD: Aug 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; DEPOSITION; ELECTROPHORESIS; KINETICS; PARTICLES; COLLOIDS; ELECTRIC FIELDS; ELECTRIC POTENTIAL; DIRECT CURRENT; MATHEMATICAL MODELS; MASS BALANCE

Citation Formats

Sarkar, P, and Nicholson, P S. Electrophoretic deposition (EPD): Mechanisms, kinetics, and application to ceramics. United States: N. p., 1996. Web. doi:10.1111/j.1151-2916.1996.tb08929.x.
Sarkar, P, & Nicholson, P S. Electrophoretic deposition (EPD): Mechanisms, kinetics, and application to ceramics. United States. doi:10.1111/j.1151-2916.1996.tb08929.x.
Sarkar, P, and Nicholson, P S. Thu . "Electrophoretic deposition (EPD): Mechanisms, kinetics, and application to ceramics". United States. doi:10.1111/j.1151-2916.1996.tb08929.x.
@article{osti_382450,
title = {Electrophoretic deposition (EPD): Mechanisms, kinetics, and application to ceramics},
author = {Sarkar, P and Nicholson, P S},
abstractNote = {The mechanisms of electrophoretic deposition (EPD) are discussed and their shortcomings identified. The kinetics of the processes involved are analyzed for constant-current and constant-voltage conditions. A method of determining the Hamaker constant of suspended particles is developed by modeling the relationship between the particle interaction energy and the suspension stability. A three-probe dc technique is used to map the voltage profile around the depositing electrode, and the results are used to explain discrepancies between the calculated and experimentally observed voltage drops during deposition. A mechanism of deposition is proposed based on DLVO theory and particle double-layer distortion/thinning on application of a dc field to the suspension. Kinetic equations are developed for constant-current and constant-voltage EPD using mass balance conditions; these are verified by experiments. After the phenomenon is introduced and discussed, a critique of the application of EPD to the synthesis of ceramic shapes and coatings is given.},
doi = {10.1111/j.1151-2916.1996.tb08929.x},
journal = {Journal of the American Ceramic Society},
number = 8,
volume = 79,
place = {United States},
year = {1996},
month = {8}
}