Ceramics-Silikáty 51 (1) 15-23 (2007)

Hydroxyapatite coatings deposited from alcohol suspensions by electrophoretic deposition on titanium substrate

B. Plešingerová, G. Súčik, M. Maryška, D. Horkavcová

Non-calcined and calcined, synthetic powders of HAp were deposited by electrophoretic (EPD) process from alcohol medium (methanol, ethanol, propanol and butanol) on the Ti-plate cathode within one or several cycles. The quality and the rate of the coating deposition were evaluated with respect to applied direct voltage (5, 10 and 20 V) and the concentration of suspension. The optimal conditions bring the medium of methanol and a direct voltage of 10 V. The coating thickness attained within several seconds tens of micrometers. The deposition time 150-180 s brings the layer thickness 150-200 µm. The growth rate of coating is affected mostly by the current density and duration of process, i.e. by charge density. The suspension concentration, conductivity of suspension and applied voltage are the main determining factors of the current density.

Keywords: Powders of hydroxyapatite, Ceramic particles, Electrophoretic deposition, Ti- cathode