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β-C_3N_4是人们根据理论计算而设计的一种目前在自然界尚未发现的新材料.β-C_3N_4具有类似于β-Si_3N_4化合物的晶体结构,其中碳原子为SP~3杂化结构,而氮原子呈现SP~2键原子组态.根据理论模型计算分析,β-C_3N_4应该有比金刚石更大的弹性模量和更高的硬度.β-C_3N_4所具有的结构与性能特征已引起了人们广泛的兴趣,对它将来的开发应用进行预测表明,β-C_3N_4化合物薄膜可望形成优于金刚石的既硬又光滑的新型膜系材料,并且有可能在航空航天等高技术领域获得重要的应用.
β-C_3N_4 is a kind of new material which is not found in nature at present.β-C_3N_4 has a crystal structure similar to that of β-Si_3N_4, in which the carbon atom is a sp ~ 3 hybrid structure and the nitrogen atom The atom configuration of SP ~ 2 bond is presented.According to theoretical model calculation and analysis, β-C_3N_4 should have larger elastic modulus and higher hardness than diamond.β-C_3N_4 has attracted a wide range of structural and performance characteristics Interest in the future development and application of the prediction shows that the β-C_3N_4 compound film is expected to form a diamond-based hard and smooth new film-based materials, and may have access to important applications in aerospace and other high-tech fields.