Atomic force microscopy study on microstructure of various ranks of coals  

作　　者：Jie-Nan PAN Hai-Tao ZHU He-Ling BAI Yan-Qing ZHAO Hai-Chao WANG Li-Ping YAO 

机构地区：[1]School of Resources & Environment, Henan Polytechnic University, Jiaozuo 454000, China

出　　处：《Journal of Coal Science & Engineering(China)》2013年第3期309-315,共7页煤炭学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （41072153）; the “Strategic Priority Research Program-Climate Change： Carbon Budget and Related Issues” of the Chinese Academy of Sciences （XDA05030100）; the Foundation for University Key Teacher by Education Department of Henan Province （2009GGJS-038）.

摘　　要：As a new technology, Atomil Force Microscopy （AFM） is being used in the research of microscopic structure on coal surface in recent years. By this technology, we can observe the nanoscale pore and crack shape of coal surface, and measure some structural parameters. Different metamorphic grades produce different feature of surface microscopic structure of coal. This paper analyzes the surface microscopic structure of different metamorphic grade coal by AFM. The results show that the coal surface microstructure has a trend from rough to smooth with the increasing of metamorphic grade. The low rank coals contain large or medium pores and the high rank coals contain micro pores. The values of surface morphology characteristic parameters （Sq and Sa） nonlinearly decrease with the increasing coal rank. That is, the coal surface becomes smoother during coalification.

关 键 词：atomic force microscopy （AFM） metamorphic degree MICRO-STRUCTURE nanoscale pore 

分 类 号：P618.11[天文地球—矿床学] TQ340.1[天文地球—地质学]