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

Journal Article · Thu Aug 01 00:00:00 EDT 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08929.x· OSTI ID:382450

Sarkar, P; Nicholson, P S ^[1]

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1. McMaster Univ., Hamilton, Ontario (Canada)

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.

• Sponsoring Organization: USDOE
• OSTI ID: 382450
• Journal Information: Journal of the American Ceramic Society, Vol. 79, Issue 8; Other Information: PBD: Aug 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
DEPOSITION
ELECTROPHORESIS
KINETICS
PARTICLES
COLLOIDS
ELECTRIC FIELDS
ELECTRIC POTENTIAL
DIRECT CURRENT
MATHEMATICAL MODELS
MASS BALANCE