Abstract:The preparation of metal-ceramic composite material, silver coated BaTiO3 powder, was investigated. The shape of single particle and congeries state were studied with SEM and laser particle size analysis. The existing state of silver on BaTiO3 was also discussed. Silver was deposited on BaTiO3 with chemical deposition method. Protected by surfactant, Ag(NH3)2 was reduced by hydrazine + hydrate, and the composite powder with excellent dispersibility was obtained. The optimal conditions are: concentration of silver 0.1%~ 0.5%, surfactant/ Ag(W/W)20%, the ratio of silver of composite powder < 80%, reaction time 120min and the concentration of hydrazine hydrate 0.8%. The particle size in SEM spectra and EDX analysis suggests that the particle is the composite material with silver coated BaTiO3.