Kinetics Analysis of Electrophoretic Deposition Using Small and Large Signal Modeling: The Case Study of Nano-Mullite Suspension

Having sufficient and accurate understanding about kinetics of phenomena could be an important reason for further technological progresses. Finding a white-box mathematical model for weight vs. time curves of Electrophoretic Deposition (EPD) using large and small signal analysis has been thoroughly studied in the present investigation. Weight-Time curves of nano-Mullite suspension have been trained using the Simulink modeling tool. Results of the investigation illustrate that, the frequency of particles, i.e., the probability of particles collision with each other decreases due to the reduction of the particles concentration in the suspension. When the solid load becomes higher close to the electrode surface, the mobility of an individual particle will be restricted and a collective pressure onto the particles closer to the electrode surface is supposed to develop. The accumulated particles will be forced to flocculate and form a solid packing structure. According to the results of modeling, the times before flocculation are suitable for deposition of a highly dense coating.