Adsorption‐Codeposition Process of Al2 O 3 Particles onto Ag ‐ Al2 O 3 Dispersion Films

Effects of particle size and concentration, flow velocity, and electrode arrangement on the codeposition ratio of onto dispersion films were examined. The following points were observed. In the deposition of films on a vertical electrode, the codeposition ratio became larger as the concentration of increased and the flow velocity dropped. At smaller cathodic overvoltages, the silver crystals grew larger and the particles codeposited selectively on the silver grain boundaries, rather than on the crystal faces. The grain growth of the silver crystals was suppressed by the addition of to the solution. The adsorption states of particles on the electrode were more stable as the particle size decreased. This finding agreed with that in which the codeposition ratio of became larger as the particle size became smaller.