Phase Behavior of Silica Brick Used in Carbothermal Reduction
In this study we observed the phase behavior of silica brick used in the process of carbothermal reduction. At 1550℃, there are liner p-SiC in clumps huddled together; At 1550℃, short line clumps changed into filamentous, mixed together. There are many particles and some p-SiC lines and few filamentous P-SiC at 1600℃. Different ratio of carbon coke also effect the phase behavior. From the results we obtained SiC powders. SiC refractory powders were prepared via carbothermal reduction method using used silica bricks as raw materials. The effects of carbon content, temperature and holding time on the phase composition and microstructure were analyzed. XRD and SEM analyses show that: P-SiC refractory powders were synthesized at 1600℃ for 6 h with 100 wt% excessive of carbon content. With the increase of carbon content, the reaction temperature and holding time, content of p-SiC gradually increased while that of cristobalite decreased.
Zihe Pan Zhaohui Huang Wenjuan Li Yan-gai Liu Minghao Fang
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
国际会议
长沙
英文
472-475
2011-06-30（万方平台首次上网日期，不代表论文的发表时间）