Abstract
Homogeneous, bubble-free and smooth gadolinium doped ceria (GDC) films were successfully obtained with the application of alternating current electrophoretic deposition (AC-EPD) in the aqueous suspension. GDC particles were well dispersed in the aqueous suspension at a pH of 9.0. The alternating current was achieved through the application of an asymmetric square wave voltage to the electrodes of the deposition cell. An optimum frequency of 1 kHz showed the best balance between the suppression of bubble evolution and enhancement of the particle migration. The deposit yield increased monotonically with increasing time under the AC-EPD with a frequency of 1 kHz, suggesting its great potential to fabricate tunable thicknesses of deposition layers. The quality of the GDC film improved with an increase in frequency. An optimum combination of forward and reverse voltages and half-widths of the pulses was found.
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