中文摘要：

理论预言，B—C—N化合物可能存在多种结构，并具有优良的物理性能，因此其合成研究引起了各国学者的关注。运用二级轻气炮冲击加载与样品回收技术，在40GPa压力附近探索了B—C—N化合物的新相合成条件。X射线衍射、高分辨率透射电镜、电子衍射、X射线光电子能谱等检测技术的分析结果表明，3种不同原子比例的B—C-N前驱物在40GPa的强冲击合成条件下，均能生成一种新的B-C—N致密新相单晶体，尺寸约为60nm。具有这种结构的B-C—N化合物在文献中未见报道。研究结果对进一步探索B-C—N新相的结构形态及其高温高压合成条件具有参考意义，也为理论工作者提供了一种新的B-C—N结构模型。

英文摘要：

Theory predicts that B-C-N compounds may exist in many structural forms and have excel-lent physical properties. Synthesis of such materials is attracting the attentions of scientists. A two-stage light-gas gun and the corresponding shock-recovery technology were applied to explore the syn-thesis conditions of B-C-N compound of new phase structures under 40 GPa pressure. XRD （X-ray dif-fraction）, HRTEM （high-resolution transmission electron microscopy）, ED （electron diffraction） and XPS （X-ray photoelectron spectroscopy） analysis show that all three precursors with different atomic ratio of B,C and N can generate a new dense phase of B-C-N compound under strong shock loading of 40 GPa. Single crystals of 60 nm are directly observed in the recovery sample. The new B-C-N com-pound of such structure has not been reported in the literature before. Therefore, this discovery is of significance for exploring new structures of B-C-N compounds and the synthesis conditions in future; meanwhile,a new structure of B-C-N compound is waiting to be studied by theoretical researchers.