宇航材料工艺2013，Vol.43Issue(4)：39-44,6.
氮化硼陶瓷前驱体的制备及表征
Synthesis and Characterization of Preceramic Polymer for Boron Nitride
叶丽 1孙妮娟 2韩伟健 1曹淑伟 2赵彤1
作者信息
- 1. 中国科学院化学研究所高技术材料实验室,北京100190
- 2. 航天材料与工艺研究所,北京100076
- 折叠
摘要
Abstract
Soluble preceramic polymer to BN ceramic,polyborazine,was synthesized via condensation of boron trichloride and hexamethydisilazane followed by a polymerization process.The average molecular weight and structure of the prepolymer during polymerization,mechanism of polymerization,pyrolysis process,and chemical composition of the obtained ceramic were investigated using gel permeation chromatography,1H NMR,infrared spectra,thermogravimetric analysis and element analysis.The results indicate that hexamethydisilazane and NH3 were released during the polymerization process.The average weight molecular and ceramic yield (1 000℃ in N2) of the polyborazine are 7 582 and 41.6 wt％,respectively.The ceramic mainly formed at the temperature range of 400 to 600℃ and white BN ceramic with low carbon content was obtained after pyrolyzed in NH3 at 800℃.关键词
氮化硼陶瓷/聚硼氮烷/高分子化/陶瓷前驱体/裂解Key words
Boron nitride ceramic/ Polyborazine/ Polymerization/ Preceramic polymer/ Pyrolysis引用本文复制引用
叶丽,孙妮娟,韩伟健,曹淑伟,赵彤..氮化硼陶瓷前驱体的制备及表征[J].宇航材料工艺,2013,43(4):39-44,6.
