大口径轻质SiC反射镜的研究与应用

介绍了大口径轻质碳化硅反射镜镜坯的基本结构、性能测试指标、国内应用及发展前景；阐述了碳化硅凝胶注模成型（Gel-casting）、反应烧结SiC（RB-SiC）与压力成型、常压烧结SiC（SSiC）两种国内主要制备大口径轻质碳化硅反射镜的方法；并对两种方法制备得到的ø1.45 m碳化硅镜坯的性能、测试数据及光学加工后的光学特性进行分析和比对，提出存在的问题，以供商榷，进而促进国内大口径轻质碳化硅反射镜的研究和发展。

Investigation and application of large scale lightweight SiC mirror

The structures, performances and applications of large scale lightweight SiC mirror blank were in-troduced.Two fabricating process dominating in our country , namely gel-casting forming followed by reaction sintering（RB-SiC） and Sintered Silicon Carbide （SSiC） via pressure molding and pressureless sintering , were elaborated which were adopted to produce φ1.45 m lightweight SiC mirrors .By comparing the performances , testing results and optical properties SiC mirrors fabricated via two different processes mentioned above , we an-alyse the problems existing in the fabricating process to further improve the development of large scale light -weight SiC mirror .