以AgNO3为银源,水合肼(N2H4·H2O)为还原剂,化学还原制备了高分散性纳米银粉.通过TEM,XRF和XRD分别对其形貌、组成和结构进行了表征.在单因素实验确定了溶液pH值、分散剂种类的基础上,结合正交实验考察了AgNO3浓度、分散剂用量及反应温度对纳米银粉的分散性的影响.研究结果表明,制备纳米银粉的优化条件:溶液pH值为8,AgNO3浓度为0.5mol·L-1,水合肼浓度为0.5mol·L=1,聚乙烯吡咯烷酮(PVP)为分散剂,PVP/AgNO3(质量比)为9∶100,反应温度为30℃.
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