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中文摘要：
采用机械球磨法，通过对球磨时间、介质流速等参数的控制，最终得到平均粒度d50=1．75μm的超细Si粉，并进行了粒度和SEM分析。结果表明，随着Si／Pb3O4延期药中超细Si粉含量的增加，其反应放热峰提前，放热量增加，但摩擦感度也相应增加。其中，超细Si粉含量为60％的样品不但具有较高的反应放热量，而且摩擦感度很低。因此，选定60％作为普通Si粉与超细Si粉在级配使用时最为合理的比例。
英文摘要：
Via controlling the milling duration and flow velocity of medium, the superfine Si powders with average diameter of 1.75μm have been prepared by wet milling method. The as-prepared samples were characterized by laser granularity measurement and scanning electron microscopy （SEM）. Results indicate that as the weight percentage of superfine Si powders increased, the peak temperature of thermal reaction decreased, and heat release and friction sensitivities increased. Hereinto, the Si/Pb3O4 sample, with the weight percentage of superfine Si powders of 60%, released more heat and had lower friction sensitivity. Therefore, as the fuel of Si/Pb3O4 delay composition, Si mixture composition with 60% superfine Si powders had the best performance.
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