Nanocrystalline silver were prepared from silver nitrate in glycerol with polyvinylpyrrolidone(PVP)as the dispersant and sodium borohydride as the reducing agent.And then silver nanoparticles were synthesized from nanocrystalline silver as the primary seed in glycerol,by increasing the reducibility of glycerol via heating.Glycerol was used as the solvent and reducing agent in the synthetic process.The effects of the type of dispersant,the concentration of silver in the growth solution and the amount of crystal seed added on the silver powder were investigated.The structure,phase and morphology of the products were characterized by X-ray powder diffractometer(XRD),field emission scanning electron microscope(FE-SEM)and transmission electron microscope(TEM).The results show that spherical silver powder in good dispersion state and with a uniform particle size of 70 nm can be obtained by optimizing the synthetic conditions.
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