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无机材料学报

无机材料学报

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爆炸冲击合成多晶C3N4的研究

于雁武， 刘玉存， 张海龙， 陈翠翠   

  1. 中北大学 化工与环境学院， 太原 030051
  • 收稿日期:2008-08-11 修回日期:2008-11-12 出版日期:2009-05-20 网络出版日期:2009-05-20

Study on Polycrystalline C3N4 Prepared by Blast Shock

YU Yan-Wu, LIU Yu-Cun, ZHANG Hai-Long, CHEN Cui-Cui   

  1. Chemical Industry and Ecology Institute, North University of China, Taiyuan 030051， China
  • Received:2008-08-11 Revised:2008-11-12 Published:2009-05-20 Online:2009-05-20

PDF (PC)

1536

被引次数

1

摘要： 研究新合成方法下得到超硬材料C3N4，利用黑索今（RDX）炸药作为高温、高压源，以双氰胺（C2H4N4）为主要前驱体. 通过扫描电子显微镜(SEM)、X射线衍射分析仪(XRD)、X射线能谱分析仪(EDS)及红外光谱仪(FTIR)分别对输出压力为16GPa时制得样品的结构、形貌、价键特性和元素组成进行了分析与表征. 结果表明，XRD测试数据与理论计算值相符很好，样品中同时含有α、β、石墨相C3N4以及晶间相；样品中C、N元素质量比为1.00∶2.98，两种元素主要以CN形式成键；利用扫描电子显微镜观测到线度为2μm的六边形β-C3N4晶粒. 采用爆炸冲击合成方法合成出多晶C3N4粉末, 并对其合成机理进行了讨论.

关键词: 冲击波, 合成, 多晶, C3N4

Abstract: A new technique was developed to synthesize the superhard material C3N4 in which high pressure and temperature needed in the reaction were supplied by RDX explosive charge and dicyandiamide (C2H4N4) was used as the primary precursor. The structure, valencebond character and elemental composition of the sample prepared under 16GPa pressure were characterized by the scanning electron microscope (SEM), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy analysis (EDS) and infrared spectrometer (FTIR) respectively. The results show that the XRD pattern is in accordance with the theoretical value, i.e., α-C3N4, β-C3N4, graphite-C3N4 and intercrystal-C3N4 are recognised in the products. The mass ratio of carbon to nitrogen is about 1.00∶2.98 and nitrogen is mostly bonded with carbon by CN. Some hexagonal β-C3N4 particles with size of 2μm are observed through SEM. Powder of polycrystalline C3N4 is synthesized successfully and its formation mechanism is discussed.

Key words: shock, synthesis, polycrystalline, C3N4

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