| Silver-palladium paste has a very important position in the fields of thick film microelectronic pastes due to its good weldability, resistance to silver migration and adjustable sintering temperature. In this paper, by using hydrazine hydrate as a reducing agent, Ag-10Pd composited powder of different shapes was prepared through the selection of surfactants, the variation of the addition methods and the control of the amount of surfactants. The experimental results showed that polyvinylpyrrolidone had a good effect on synthesizing monodisperse polyhedral silver-palladium powder, while by the addition of gelatin, the spherical composited powder could be obtained. The particle sizes and shapes of Ag-10Pd powder could also be regulated and controlled by different addition methods and the addition amount of gelatin, respectively. |
