【摘要】 超细铜粉在以铜代银并在电子浆料、陶瓷材料和化工催化剂等材料的制备中具有较好的应用前景。本研究用Vc作还原剂,PVP,PVA和PAA作为保护剂并在反应前预先配成还原剂/保护剂体系,用于铜氨溶液的还原,可以得到粒度分布均匀的纳米铜粉。所得铜粉用油酸钝化可以有效地防止铜粉的表面氧化。反应温度和n(保护剂):n(Cu)值对铜粉颗粒的粒径和形状影响很大,当n(PVP):n(Cu)处于0.03～0.1时,铜颗粒基本上为长方体形。PVA和PAA作为保护剂时所得铜粉颗粒的形状为非球形的n(保护剂):n(Cu)的范围分别为0.02～0.09和0.02～0.08。其原因可归于高分子分散剂对铜粒子的部分保护作用。更多还原

【Abstract】 Superfine copper powders can be used as the electronically conductive adhesives, ceramic materials and catalyst, and have shown a good application prospect instead of silver with copper in industry. The anti-oxidation nano-scale copper powders were prepared by using a protection-reduction technique from a copper ammonia complex solution, in which ascorbic acid (VC) was used as reducing agent, and polyvinyl pyrrolidone (PVP), polyvinyl alcohol (PVA) or polyacrylamide (PAA) were protection agents, and oleic acid was passivation agent. The obtained copper powders are homogeneous and stable in air. The reaction temperature and the value of n (protection agent): n (Cu) have a great influence on the particle size and shape. When the ratios of n (PVP),n (PVA) and n (PAA) to n (Cu) range from 0.03 to 0.1, 0.02 to 0.09 and 0.02 to 0.08 respectively, the obtained particles will be cuboids or non-spheroid. The reason can be attributed to the partial protection of polymer.更多还原