Effect of AI2O3 powder on properties of fumed silica thermal insulating composites using mechanofusion technique
This study describes the manufacturing process of thermal insulating composites which made from fumed silica powder, reinforcing fibre and other additives using advanced mechanofusion technique. The research focuses on the effect and mechanism of Al2O3 powder on thermal insulating composites, which using as high temperature shrinkage inhibitors to restrain sintering in fumed silica compacts at high temperatures. The results show that nanosize Al2O3 powder can effectively improve the volume stability of the compacts above 800 °C, but which has little influence on thermal conductivity at higher temperatures. The compacts prepared in this study exhibit fracture strength of 0.26 MPa at room temperature, thermal conductivity of 0.0336 W/(m·K) at 1000 °C and tiny volume shrinkage about 1.1％ at 1000°C for 12h.
fumed silica powder mechanofusion, AI2O3 powder volume shrinkage thermal conductivity
HAN Lu YUAN Lei Liu Jia-zhan YU Jing-kun
School of Material and Metallurgy, Northeastern University, Shenyang 110189, China
国际会议
大连
英文
1011-1015
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）