大尺寸轻型碳化硅质反射镜素坯的凝胶注模成型  

Gel-Casting of Large-Scale Lightweight SiC Mirror Blank

作　　者：张舸[1,2] 赵汝成[1] 赵文兴[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100049

出　　处：《稀有金属材料与工程》2008年第A01期678-681,共4页Rare Metal Materials and Engineering

摘　　要：利用凝胶注模成型工艺制备了大尺寸轻型碳化硅(SiC)质反射镜素坯。讨论了SiC的颗粒级配、固相含量对浆料性能的影响以及催化剂、引发剂、浆料温度对凝胶时间的影响。结果表明:最佳分散条件下固相含量为65%的SiC水基浆料具备良好的流动性,适于进行凝胶注模成型;引发剂加入量为20mmol/L浆料,与催化剂的摩尔比为5∶1,浆料温度降到15℃时,凝胶时间能够满足注模及成型所需。最终测试了反应烧结后SiC陶瓷的性能。The large-scale lightweight silicon carbide （SIC） mirror blank of Ф680 mm was prepared by gel-casting. The effects of the proportion of different size grains, the concentrations of the solid in suspension and the gel-casting time were studied. Low viscous aqueous SiC suspensions of 65% solid loading was obtained which enables gel-casting. A suitable gelation time for molding was obtained in use of the initiator of 20 mmol per 1L slurry, the mole ration of the initiator and catalyst of 5：1 and the slurry temperature of 15 ℃. Finally, the properties of the sintered body were tested.

关 键 词：碳化硅 轻型反射镜 凝胶注模 

分 类 号：TQ174.6[化学工程—陶瓷工业]