叶腊石干法研磨过程中偏叶腊石相的HRTEM研究  

Investigation on the Anhydride Phase of Pyrophyllite during Dry Grinding by High-resolution Transmission Electron Microscopy

作　　者：严俊 张俭[2] 严雪俊 方飚 徐利强[2] 盛嘉伟[2] 

机构地区：[1]浙江省质量检测科学研究院,杭州310013 [2]浙江工业大学化学工程与材料学院,杭州310014

出　　处：《硅酸盐通报》2013年第10期1993-1997,共5页Bulletin of the Chinese Ceramic Society

基　　金：浙江省科技厅公益技术研究社会发展项目(2011C33SAB8001);浙江省科技厅重大主题专项(2007C111042);浙江省质检院预研项目(2013bm09)

摘　　要：采用高分辨透射电镜(HRTEM)对叶腊石研磨的中间产物偏叶腊石相进行晶体结构的研究,并就研磨与热处理对叶腊石晶体结构的影响首次进行了傅里叶变换红外(FTIR)光谱的对比。结果表明:(1)干法研磨过程中,叶腊石研磨的中间相为偏叶腊石,且研磨使得叶腊石的晶体结构出现明显的晶格膨胀,其中研磨作用对叶腊石沿其c轴方向的晶体结构的影响较大。(2)研磨或者热处理条件下,叶腊石的FTIR光谱中3673 cm-1处峰形尖锐的羟基伸缩振动峰的强度随着研磨时间或煅烧温度的增大而逐渐降低,并最终消失。该结论表明热与机械力研磨处理对叶腊石晶体结构的破坏具有相似性。The lattice structure of pyrophyllite anhydride produced by dry grinding was investigated by using high-resolution transmission electron microscopy （HRTEM）. Furthermore, the effects of thermal treatment and dry grinding on the lattice structure of pyrophyllite were also comparative studied by Fourier transformation infrared spectroscopy （FFIR）. The following results are obtained： （1） Dry grinding of pyrophyllite leads to transformation into the anhydride phase of pyrophyllite. Meanwhile, dry grinding can cause the lattice dilatation. The alteration by grinding is greater in the direction the c-axis of pyrophyllite crystal structure. （2） With the increase of grinding time or annealing temperature, the intense and sharp single band detected at 3673 cm-1 in the FTIR spectra of heated or ground pyrophyllite powder decreased in intensity, which is assigned to OH-stretching vibration, and disappeared in finally. It indicated the similar effects on the lattice structure were coexisted during the thermal and mechanical treatments of pyrophyllite.

关 键 词：叶腊石 干法研磨 偏叶腊石 高分辨透射电镜 傅里叶红外光谱 

分 类 号：P575[天文地球—矿物学]