Influence of the electrode distance and applied electrical potential on deposition of nano alumina in ethanol suspension

Subject Areas :

Mostafa  Milani ¹ (IROST)
Syed Mohammad  Zahraee ² (سازمان پژوهش‌های علمی و صنعتی ایران)
Syed Mohammad  Mirkazemi ³ (دانشگاه علم و صنعت ایران)

Received: 2016-11-20 Accepted : 2018-06-18 Published : 2018-05-22

Keywords: Electrical field, electrophoretic deposition, Kinetic equations, Nano alumina,

Abstract :

The kinetics of electrophoretic deposition is influenced by various factors. Hamakr summarized them on five parameters such as suspension concentration, electric field on the suspension, the surface area of the electrodes, electrophoretic mobility, and the process time. The electric field in the suspension can be changed using the electric potential applied between the electrodes and electrode distance change. Since the suspensions is a non-ohmic resistance, these two parameters will not be the same. The change of electric field using each of these two parameters causes kinetic equations change. In long distances electrodes and poor electrical potential, kinetic equations are based on electrical resistance more accurately. In the strong fields and low electrode distance kinetic equations based on equivalent conductivity are more accurate. The results of this study showed that, in the electric field 70V/cm Ferrari et al. equation and in the electric field 25V/cm Sarkar and Nicholson equation have accuracy of less than 0.01 and less than 0.1, respectively.

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