Silver powder was fabricated by spray pyrolysis,using 2%-20% AgNO_3 solution,336-500 mL/h flux of AgNO_3 solution,0.28-0.32 MPa flux of carrier gas and in the 620-820℃tem-perature range.The effects of furnace set temperature,concentration of AgNO_3 aqueous solution,flux of AgNO_3 aqueous solution as well as carrier gas on the morphology and particle size distribution of silver powder,were investigated.The experimental results showed that with the high concentration of AgNO_3 aqueous solution,the average grain size of silver decreased with the increasing of furnace set temperature.But the gain size distribution was not homogenous,the discontinuous grain growth oc-curred.With the low concentration of AgNO_3 aqueous solution,the higher furnace set temperature made the nano sliver grains sintered together to grow.Nano silver powder about 100 nm was fabricated by spray pyrolysis,using 2wt% AgNO_3 solutions,336 mL/h flux of AgNO_3 aqueous solution,0.32 MPa flux of carrier gas at 720℃ furnace set temperature.
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