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  4. Critical particle concentration in electrophoretic deposition
 
conference paper

Critical particle concentration in electrophoretic deposition

Radice, S.
•
Bradbury, C. R.
•
Michler, J.
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2010
Journal Of The European Ceramic Society
3rd International Conference on Electrophoretic Deposition - Fundamental and Applications

The role of particle concentration in electrophoretic deposition (EPD) was investigated with two different suspension systems. The first system consisted of positively charged TiO2 nanoparticles dispersed in isopropanol with 1 vol% water. The second system consisted of negatively charged polystyrene (PS) microbeads dispersed in isopropanol. Constant voltage EPD was performed using suspensions with variable particle concentration (0.013-0.43 vol% TiO2 and 0.06-11.4 vol% PS). Threshold concentration values were identified for both systems after EPD at 100 V(250 V cm(-1)) for 1 min. Below these values the deposited mass deviated from the trend dictated by Hamaker's equation. Higher applied voltages and longer deposition times were tested and the results suggested that the threshold concentration did not depend on those parameters. A phenomenological model of particle deposition was proposed, which accounts for the local electrochemical conditions close to the substrate in relation to particle size. (C) 2009 Elsevier Ltd. All rights reserved.

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Type
conference paper
DOI
10.1016/j.jeurceramsoc.2009.08.021
Web of Science ID

WOS:000275022800003

Author(s)
Radice, S.
Bradbury, C. R.
Michler, J.
Mischler, S.  
Date Issued

2010

Published in
Journal Of The European Ceramic Society
Volume

30

Start page

1079

End page

1088

Subjects

Suspensions

•

Electrochemistry

•

Diffusion

•

TiO2

Editorial or Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
SCI-STI-SM  
Event nameEvent placeEvent date
3rd International Conference on Electrophoretic Deposition - Fundamental and Applications

Hyogo, JAPAN

Oct, 2008

Available on Infoscience
December 16, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/75689
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