硅酸盐学报2017，Vol.45Issue(3)：378-383,6.DOI:10.14062/j.issn.0454-5648.2017.03.09
Si3N4/BAS复相陶瓷材料制备及其性能
Preparation and Performance of Si3N4/BAS Composite Ceramics
余娟丽 1吕毅 1王涛 1张剑 1张天翔 1赵英民 1裴雨辰1
作者信息
- 1. 航天特种材料及工艺技术研究所,北京 100074
- 折叠
摘要
Abstract
Si3N4/BAS ceramic composite was prepared by a novel freeze-gelation method. The ceramic composition and micro morphology were analyzed, and the mechanical/electric performance and thermal shock resistance were investigated. The results show that the shrinkage rate of green body is < 1%, and the flexural strength, elastic modulus and the change rate of dielectric constant are 280 MP, 90 GPa, 6% at 1300℃, respectively. Si3N4/BAS ceramic composite has a superior thermal shock resistance and a high machinability. At a high temperature, softening and high viscosity of BAS glass phase in Si3N4/BAS ceramic composite are the main reasons of releasing thermal stress.关键词
冷冻凝胶/氮化硅/复相陶瓷/天线罩Key words
freeze-gelation/silicon nitride/ceramic composite/radome分类
信息技术与安全科学引用本文复制引用
余娟丽,吕毅,王涛,张剑,张天翔,赵英民,裴雨辰..Si3N4/BAS复相陶瓷材料制备及其性能[J].硅酸盐学报,2017,45(3):378-383,6.
