Electrophoretic kinetics of nanomullite, nanoSiC and their composite suspensions

Abstract

In detail characterisation of suspensions including nanomullite, nanosilicon carbide and various percentages of their composites has been studied in this Letter. Mechanism of particle ionisation, alternate pH and surface charge, particle size distribution, zeta potential, current density, electrophoresis movement and kinetics of time-weight curves has been studied, thoroughly. It was illustrated that triethanolamine cannot stabilise powders as well. However, poly-vinyl pyrrolidone could stabilise the particles as well but the particles could not move easily in the presence of applied electrical field due to the lack of enough surface charge. In this case, iodine (I) could be utilised as the preferred surfactant due to good stability and enough surface charge even though it could increase the concentration of free ions and conductivity of particles may be decreased. It was also found that in the case of utilising optimum surfactant, the amount of zeta potential for mullite suspension is more than composite powder and these two have a greater zeta potential than SiC suspension. Last but not least, it was found that the velocity of deposition reduces by increasing the time and its reduction depends on resistance and permittivity of suspension.

Corrosion Resistance and Adhesion Properties of Electrophoretic Deposited Nano TiN Powder

“…In EPD, charged particles, dispersed in a liquid suspension, are migrated and deposited onto an oppositely charged conductive substrate under electric fields. The key factors affecting the EPD process are particle size, zeta potential (stability) and electrical conductivity of dispersant [16][17][18][19][20][21][22][23].…”

The Coating of Bovine-Source Hydroxyapatite on Titanium Alloy (Ti-6Al-4V ELI) Using Electrophoretic Deposition for Biomedical Application

“…Bovine-source hydroxyapatite (bovineHA) can be coated onto titanium surface,Ti-6Al-4V ELI, through such methods, the one is electrophoretic deposition (EPD), a feasible coating method for implant-orthopedic application [13,32]. Principally, the method uses an electric field to migrate and deposit of charged particles suspended within a certain solution, then performance by a sintering process to increase the adhesion strength of green coating on the material surface [33,34]. Those advantages are efficient in technical working, thickness, and morphology of coating can be controlled according to its parameters and can be applied to complex materials [35].…”