| 煤基石墨的喇曼光谱学研究 |
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| 引用本文： | 陈宣华,郑辙.煤基石墨的喇曼光谱学研究[J].矿物学报,1993,13(4):313-318. |
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| 作者姓名： | 陈宣华 郑辙 |
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| 作者单位： | 地质矿产部地质力学研究所，北京大学地质系 北京 100081，北京 100871 |
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| 摘 要： | 煤体经热变质作用形成的石墨叫煤基石墨。本文研究了煤基石墨的一级和二级喇光谱。作者认为，石墨及有关的碳质物质的一级喇曼光谱是由层内振动激发的，反映了它们作为二维晶格的完整性程度。煤基石墨中存在的层内结构缺陷分为两种，一是煤中特有的，在石墨化过程中逐渐消失，另一是由研磨（剪切应力）作用带入的，可能与构造应力作用有关，石墨化过程和剪切应力作用过程是效果近于相反的两过程，而石墨的二级喇曼光谱则可揭示其作为
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| 关 键 词： | 煤基石墨 结构缺陷 石墨 散射谱 |
A RAMAN SPECTRAL STUDY OF COAL-BASED GRAPHITE |
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| Chen Xuanhua,Zheng Zhe Institute of Geomechanics,CAGS,Beijing.A RAMAN SPECTRAL STUDY OF COAL-BASED GRAPHITE[J].Acta Mineralogica Sinica,1993,13(4):313-318. |
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| Authors: | Chen Xuanhua Zheng Zhe Institute of Geomechanics CAGS Beijing |
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| Institution: | Chen Xuanhua,Zheng Zhe Institute of Geomechanics,CAGS,Beijing,100081 Department of Geology,Beijing University,Beijing,100871 |
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| Abstract: | Graphite formed in response to thermal contact metamorphism of coal bodies is referred to ascoal-based graphite. This study is concerned with the Raman spectra of the coal-based graphitetaken from the Lutang area, Hunan Province. The spectral features of graphitic and disordered car-bon are discussed in terms of the factor group, C_(6V)~4 and the layer site symmetry, C_(3v). All the bandsobserved for graphite and carbon in the first-order Raman spectrum are of in-plane vibrationand they are sensitive to the extent of two-dimensional graphitic ordering. There are two kinds ofin-plane structural defects in the coal-based graphite, the first kind being characteristic of thecoal and disappearing during graphitization; the second being introduced by grinding(shearing),which may be attributed to tectonic stress. The second-order Raman spectra are sensitive tothe three-dimensional graphitic ordering. |
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