摘要
为了提高超细铜粉分散性、均匀性及抗氧化性,采用几种化学还原法工艺分别制备了铜粉,通过反应现象探讨了温度、还原剂、添加剂及葡萄糖预还原对铜粉性能的影响,利用SEM、粒度仪对铜粉形貌、粒径进行观察,并进行相关机理分析,确定了化学还原法制备超细铜粉的最佳工艺,结果表明,在温度为70℃时,添加分散剂PVP和抗氧化剂BTA,以甲醛-水合肼为复合还原剂,结合葡萄糖预还原法制备的铜粉具有抗氧化性强、粒径分布区间窄、几乎无团聚等优点。此工艺不仅体现了葡萄糖预还原的有利影响,还明显克服了单一还原剂的缺陷,所制铜粉质量好,具有良好的应用前景。
To improve the dispersibility, uniformity and anti-oxidizability of ultra-fine copper powder, several chemical reduction processes were employed to prepare copper powders. The influence of the reaction temperature, reducing agents, additives and glucose pre-reduction on copper powder properties were discussed by observing the phenomenon. To determined the best process for preparing superfine copper powders, the copper morphology, particle size were characterized by SEM and laser particle analyzer XRD, and the associated mechanism was analyzed. The results showed that： at 70℃, adding PVP and BTA, used formaldehyde-hydrazine hydrate as composite reducing agents, copper power with particle size below 500 nm, a narrow distribution range and non-agglomeration was obtained by glucose pre-reduction. This process not only shows the beneficial effects of glucose pre-reduction, but overcomes the single-reducing agent shortcom- ings, the obtained copper powers have good qualities and application prospects.
基金
沈阳市科学技术计划项目（1071112-2-00）
关键词
分散性
化学还原
复合还原剂
粒径
分布区间
dispersibility
chemical reduction
compound reducing agent
particle size
distribution range
