微米级球形银粉的可控制备

Controlled Synthesis of Micron-Size Silver Particles

采用化学还原法,以七水硫酸亚铁(FeSP_4·7H_2O)为还原剂,在室温条件下搅拌还原硝酸银溶液制备了表面粗糙度高、粒度分布窄的微米级球形银粉。结果表明,通过控制还原剂与氧化剂物质的量比可以制备出粒径范围在1～4μm、尺寸可调的单分散球形银粉。

Controlled synthesis of uniform micxdn-size silver particles were obtained by reducing silver nitrate with iron（ 11 ） sulfate heptahydrate in aqueous solution at room temperature. By varying molar ratio between silver nitrate and iron（ 11 ） sulfate heptahydrate, large flower-like silver particles with the size ranged Of l-4μm could be obtained. The structure and morphology of the as-prepared product were characterized by energy dispersive spectrometer （EDS）, X-ray diffraction（XRD） and scanning electron microscopy（SEM）, and it is found that the obtained silver par-ticles are of excellent monodispersity and narrow particle size Aistrihntinn.