采用红外光谱仪(IR)、场发射扫描电镜(FE-SEM)、高分辨透射电镜(HR-TEM)、X射线粉晶衍射(XRD)仪与热重(TG)等方法对叶腊石型青田石在干法研磨过程中形貌与晶体结构改变、影响研磨效率的因素及研磨的最终产物等进行研究.结果表明:研磨最终使得单斜晶系叶腊石变成无定形态,因粉体表面能的增加,机械力研磨使得叶腊石颗粒发生“细化-团聚-细化”的反复过程.HR-TEM及XRD测试结果表明研磨产物只存在石英相.此外,研磨的球料比可以显著影响叶腊石晶体结构的改变速率,球料比越大时,破坏速率越大.同时因原矿中石英的硬度高于叶腊石,使得研磨过程中石英对叶腊石晶体结构的改变存在一定的抑制作用.
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