高结晶单分散银粉表征及低温烧结活性分析

Highly crystallized monodisperse silver powder characterization and low-temperature sintering activity analysis

采用液相还原法,通过改变纳米银晶浓度制得不同粒径的类球形银粉。采用扫描电子显微镜、比表面积分析仪、激光粒度分析仪等对银粉进行物理性能表征,并进行低温(200℃)烧结活性分析。结果表明:银粉颗粒结晶度高,单分散性好,且银粉粒径随加入的纳米银晶浓度提高呈规律性递减;样品4粒径最小,经低温烧结后银粉颗粒边界逐渐消失,烧结30 min后银粉完全烧结,形成交错联结的空间网络结构。高结晶单分散银粉的制备为HJT电池开发提供技术支撑。

Liquid phase reduction method is used to alter nano-silver crystal concentration and fabricate near spherical silver powder of different particle diameters.SEM,specific surface area instrument,and laser particle analyzer are used to characterize the physical properties of the silver powder.Besides,low-temperature(200℃)sintering activity analysis is carried out.The results show that the silver powder particle is highly crystallized and in a good monodisperse state,and the silver powder particle diameter regularly decreases with increasing added nano-silver crystal concentration;sample 4 has the smallest particle diameter and gradually lost silver powder particle boundary after low-temperature sintering.After 30 min,the silver powder is fully sintered,forming an interconnected spatial grid structure.The fabrication of highly crystallized monodisperse silver powder provides technical support for the development of the HJT battery.