手机知网 App
24小时专家级知识服务
打 开
无机化工
Effect of Al on Al_4SiC_4-Al_4O_4C Composite Synthesized from Kaolinite Grog
 
The Al4SiC4-Al4O4C composites were synthesized using 1∶6.5∶2.6 of molar ratio of kaolinite grog powder, carbon black, and aluminum powder as basic formulation, fixing the additions of kaolinite grog powder and carbon black, varying aluminum powder addition to make its proportion from 2.6 to 3.9, 5.5, 7.0, 8.6, and 10.4, respectively, adding phenolic resin as binder and absolute alcohol as dispersant, mixing well, pressing, drying, and firing at 1 700 ℃ for 2 h in a corundum tubular furnace in flowing argon. The effect of Al addition on phase composition and microstructure of Al4SiC4-Al4O4C composites was investigated by DTA-TG, XRD, and SEM. The results show that:(1) in a certain degree, more Al4SiC4 forms with Al powder addition increasing; (2) the formed Al4SiC4 has two morphologies, namely, sheet and block, and their particle sizes are 5-15 μm and 10-20 μm, respectively; (3) the Al powder addition increase has little effect on the grain shape and size of Al4SiC4; (4) the formed Al4O4C mainly distributes on the surface of the Al4SiC4 grains with irregular shape and particle size below 1 μm, and some of them bond together.
2 32
手机阅读本文
下载APP 手机查看本文
China's Refractories
2012年03期
相似文献
图书推荐
相关工具书

搜 索