The results on the treatment of B4C powders show that the changes of powder sizes during treatment are small, The results on EDX show that the impurities of B4C powders have mainly Fe besides Ca, Mg, Al, Si, Ti, Cr, Mn, and so on.

• B_4C粉末提纯结果显示了在处理过程中晶粒度几乎没有变化，EDX分析表明：提纯过程中去除的杂质以Fe为主，还含有Ca、Mg、Al、Si、Ti、Cr、Mn等元素。