AP包覆超细硼粉的改进方法

Improvement for AP Coating Superfine Boron Powder

采用沉积法,以甲醇、丙酮为溶剂,AP为主要原料,对超细硼粉进行包覆。研究了溶剂、蒸发速率及氨基硅烷偶联剂对包覆效果的影响,并采用红外光谱、热分析、原子力显微镜、透射电镜等手段分析了包覆效果。结果表明,最佳的蒸发速率为10g.h-1;包覆前先对硼粉进行硅烷偶联剂预处理,会使硼粉的表面沉积更均匀,包覆效果更好;包覆后硼粒子表面规整,而且外表面存在较明显的包覆层。

The superfine boron powder was coated by aggradation method with AP using methanol or acetone as the solvent. The coating effect were characterized by FT-IR, heat analysis, atom force microscope, transmission electron microscope et al, and the influencs on the coating of the solvent, vaporized velocity and amido-silicon alkyl were studied. The results show that the optimized vaporized velocity is 10 g · h^-1. The pretreatment of boron power by amido-silicon alkyl in advance brings a good coating effect of superfine boron powder.