摘要：测试了高氯酸·[四氨·双(5-硝基四唑)]合钴(Ⅲ)原样及其超细样品的粒度分布。结果表明,超细样品和原样均呈双峰/多峰分布,且其粒度分布具有分维特征。原样的分维数较低为1.80,3个细化样的分维数均较高,为2.32～2.42。分析认为,研磨时间从0延长至60min,对应样品粒度分布分维数增大,符合通常的粒度分布规律。研磨时间从60min延长至150min期间,对应样品中亚微米和纳米粒子含量较高,团聚较严重,使粒度分布发生异常,粒度分布分维数计算中的相关系数有所减小,分维数计算值不再增加。分维数可在一定程度上反映超细粒子团聚行为的严重程度。

关键词：超细粒子；炸药；分维；粒度分布

Abstract：The particles size distribution of tetra ammine-bis(5-nitro 2H-tetrazolato-N2) cobalt(Ⅲ) perchlorate(BNCP) origin and superfine particles,which showed bimodal or multimodal curve,was measured to present a fractal structure.The fractal dimension of BNCP origin particles size distribution was calculated lower to 1.80 and fractal dimension of three BNCP superfine particles was calculated higher to 2.32～2.42,which meant that the fractal dimension of BNCP particles increased after grind-ing.The fractal dimension calculation was supposed to be disturbed by su-perfine particles reunion.Superfine particles reunion went serious and seri-ous during grinding so that the correlation coefficient of fractal dimension calculation formula reduced and fractal dimension calculation value did not increased monotonously but decreased.Reversion of fractal dimension was considered matching up to reunion extent.

Keywords：superfine particles;explosive;fractal;particle size distribution