天然准纳米针状石墨的发现及其结构表征  

The discovery of quasi-nanometer needle-like graphite and its structural characteristics

作　　者：冯有利[1] 郑辙[2] 郭延军[2] 于立竞[1] 

机构地区：[1]桂林工学院资源与环境工程系,广西桂林541004 [2]北京大学地球与空间科学学院,北京100871

出　　处：《新型炭材料》2004年第4期309-311,共3页New Carbon Materials

基　　金：国家自然科学基金(40072016);河南省自然科学基金(0211060900)~~

摘　　要：　在新疆苏吉泉花岗岩所含团块状石墨中发现一种细长针状物,经高分辨电镜能谱分析其化学成份为碳。电子衍射数据分析表明其结构为2H多型石墨。确认该细长针状物为准纳米针状石墨,其长度可达12500nm,宽度为150nm,边缘平直,且晶面条纹平直度极高。认为这种准纳米针状石墨会具有优异的力学性质,可能是一类高强度的材料。One sort of long needle mineral with 12500nm length and 150nm width was discovered in ball-like graphite from Sujiquan granite, Xinjiang, China. Analysis by X-ray energy dispersive spectrometry (XEDS) attached to a high resolution transmission electron microscope (HRTEM) shows that it is composed of carbon. Selected area electron diffraction (SAED) illustrates that its crystal structure is 2H type graphite. Thus, this mineral can be confirmed as quasi-nanorneter needle graphite because its width of 150 nm is only slightly larger than the 100 nm nanometer scale limit. Its rim is straight as are the fringes of the crystal planes. This quasi nanometer needle graphite should have outstanding mechanical characteristics.

关 键 词：准纳米针状石墨 高分辨电子显微镜 x射线能量分光谱 选区电子衍射 花岗岩 

分 类 号：P578.16[天文地球—矿物学]