SiBNC体系陶瓷先驱体的研究进展

分别对SiBN、SiBC和SiBNC陶瓷先驱体及其单源先驱体的制备进行了综述。总的来说,陶瓷先驱体的制备可以分为两大类,即采用不同分子的共缩合和单源先驱体的缩聚两种路径。后者由于其单源先驱体分子具有最终陶瓷产物中所具有的组成和结构特征,并且这种特征能保持到最终的产物中,因而最受关注。同时对两种制备方法的发展前景作了初步的分析与讨论。

Advances in the Preceramic Polymers in SiBNC System

To prepare preceramic polymers in the SiBNC system,different synthetic routes of preceramic polymers and single source precursors for SiBN,SiBC and SiBNC ceramics known to date were compiled and critically reviewed.The synthetic routes of the preceramic polymers were classified into two groups: co-condensation of different molecular species and polycondensation of single source precursors.The latter one was paid more attention these days since the single source precursors exhibit structural features that are desired to be present in the final ceramics.Current situations of the preceramic polymers in the SiBNC system at home and abroad,as well as their prospects,were also discussed in this paper.