添加剂对金属银粉形貌和粒径的影响

Effect of Additives on the Morphology and Particle Size of Silver Powder

摘要:

本文选择结构和性质各异的添加剂制备金属银粉，在其他实验条件相同的情况下对比分析了不同的添加剂对银粉形貌和粒径的影响机理。研究结果表明，选择无支链或少支链的长链状高分子化合物作为添加剂，更有利于制备出表面光滑、近球形的金属银粉。本文以PVP K.30为添加剂，通过调整和优化实验参数，成功制备出分散性优异、近球形、结晶性好的金属银粉，粒径约为2.5 ~ 3 μm，振实密度4.2 g/cm3，符合太阳能电池电子浆料用金属银粉的指标要求。

Abstract:

Additives with different structures and properties were selected to prepare the silver powder under the same experimental conditions. The effect of the different additives on the morphology and particle diameter of the silver powder was compared and analyzed. The results show that, using the no branched or less branched long-chain polymer compound as additive is more helpful to prepare the silver powder with smooth surface and spherical shape. In this paper, based on the additive of PVP K30, the silver powder with excellent dispersion, spherical shape and good crystallization was prepared successfully by adjusting and optimizing the experimental parameters. The particle size is about 2.5 ~ 3 μm and the tap density is 4.2 g/cm3, which can meet the required index of silver powder used for the solar electronic paste.