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将三聚氰胺和硼酸的混合物进行高温处理 ,制备出成分为B0 .54 C0 .2 8N0 .1 8的B -C -N前驱物 .这种前驱物与Ca3B2 N4触媒混合后在 5 .5GPa,16 0 0℃条件下获得平均成分为B0 .47C0 .2 3N0 .3 0 的化合物 .采用X射线衍射和选区电子衍射分析了高压合成产物的晶体结构 ,发现合成的B -C -N化合物由 3种相组成 ,主晶相为正交相 ,其余为六方相和立方相 .用X射线光电子谱和红外光谱分析了合成产物的价键结构
The mixture of melamine and boric acid was subjected to a high temperature treatment to prepare a B -C -N precursor having a composition of B0.54 C0.28N0.1.8 This precursor was mixed with Ca3B2 N4 catalyst at 5.5 GPa and 160 The average composition of B0.47C0.23N0.30 was obtained at 0 ° C. The crystal structure of high pressure synthesis product was analyzed by X-ray diffraction and selected area electron diffraction and it was found that the synthesized B -C -N compound consists of three phases , The main crystal phase is the orthorhombic phase, and the rest is the hexagonal and cubic phase.The valence bond structure of the synthesized product was analyzed by X-ray photoelectron spectroscopy and infrared spectroscopy