高温高压下C_3N_6H_6分解产物的研究  

Study of the Products of C_3N_6H_6 Treated at High Temperature and High Pressure

作　　者：姚立德[1] 禹日成[1] 李凤英[1] 刘振兴[1] 李吉学[2] 靳常青[1] 

机构地区：[1]中国科学院物理研究所,北京100080 [2]长春工业大学材料科学与工程学院,吉林长春130012

出　　处：《高压物理学报》2004年第3期220-224,共5页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金;国家重点基础研究发展规划项目(2002CB613301)

摘　　要：采用高温高压方法分解缩聚三聚氰胺(C3N6H6),得到一种棕黑色粉末。经过X射线粉末衍射分析,产物主要由未完全分解的原料、碳和分解过程中的过渡相组成。透射电镜观察结果显示,过渡相在某一方向具有长周期结构;在扫描电镜下观察形貌,产物为片状组织,且其中有少量气孔;X射线能散结果表明,C∶N≈3.27∶1(原子比);此外,进行了红外吸收谱和X射线光电子能谱测试,产物主要键合状态是C(sp2) N和C(sp2)—N。A black-brown powder was synthesized from melamine (C_3N_6H_6) by means of high temperature and high pressure.Based on the analysis of X-ray diffraction patterns,the powder is composed of some un-decomposed raw material,carbon and intermediate phases.The existence of the intermediate phase with long periodicity along one direction is confirmed from transmission electron microscopy observation;Scanning electron microscopy shows many block tissues,in which a few holes exist;The atomic ratio of carbon and nitrogen is determined as 3.27∶1 in the powder from the measurement of Energy Dispersive X-ray Analysis.The high content of C is caused by the existence of carbon decomposed from the raw materials.In addition,the chemical bond states are investigated by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy.As a result,the main bond styles in the powder are described as C(sp^2)N and C(sp^2)—N.

关 键 词：高温高压物理 碳氮晶体 键合状态 缩聚三聚氰胺 

分 类 号：O521.2[理学—高压高温物理]