片状h-CN化合物的高温高压化学合成与表征

 以高温烧结三聚氰胺制得的CNH化合物为C、N源，与分析纯单质硼粉以一定比例混合，在5.0～5.5 GPa、1 400~1 500 ℃高温高压条件下，经化学反应合成了六角硼碳氮（h-BCN）晶体。用傅立叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）对产物进行了表征，结果表明，得到了含碳量较高的六方结构B_0.18C_0.66N_0.16化合物，成分接近于BC₄N，硼、碳、氮是以原子化合的形式存在；XRD分析确定该合成产物具有六角网状结构；SEM测量结果表明，B-C-N晶体具有片状六角形貌，尺寸在1 μm左右。

Chemical Synthesis and Characterization of Flaky h-CN by HPHT

Hexagonal boron carbonitrogen (h-BCN) crystal was synthesized from the mixture of boron powder and CNH compound prepared by pyrolysis of Melamine (C₃H₃N₃) under high temperature (1 400~1 500 ℃) and high pressure (5.0~5.5 GPa). X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy were used to determine the product chemical composition and characterization. The results show that the product has composition of B_0.18C_0.66N_0.16 (near BC₄N) and atomic-level hybrid. X-ray diffraction analysis indicates that the powder has hexagonal network structure. Scanning electron microscopy result suggests that h-BCN crystal morphology are mainly hexagonal flaky and the diameter is about 1 μm, thickness 200 nm.