锆英石加入量对莫来石-碳化硅浇注料性能的影响  

Effect of zircon addition on properties of mullite-SiC castables

作　　者：刘龙[1] 李友胜[1] 李楠[1] 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081

出　　处：《耐火材料》2013年第3期197-199,共3页Refractories

摘　　要：采用烧结莫来石(5～3、3～1、≤0.088 mm)、碳化硅(3～1、1～0.5、≤0.5 mm)、锆英石细粉、SiO2微粉、Secar 71水泥和ρ-Al2O3细粉为主要原料,分别研究了锆英石加入量(w)为3%、6%、9%和12%时,对莫来石-碳化硅浇注料性能的影响。结果表明:1)随着锆英石加入量的增加,试样的线收缩率减小,体积密度变大,1 200℃热处理后强度稍有降低,1 500℃埋炭热处理后强度先增大后减小;2)加入锆英石并不能改善莫来石-碳化硅浇注料的抗热震性能;3)加入锆英石可以改善试样的耐磨性能,以质量分数6%为最好。Mullite- SiC castable specimens were prepared using sintered mullite （5-3,3 - 1, and ≤0. 088 mm）, silicon carbide （3-1,1-0.5, and≤ 0.5 mm ）, zircon fine powder, microsilica, Secar71 cement and p-AI203 fine powder as main starting materials. Effects of zircon additions（3% ,6% ,9% and 12% ,in mass） on properties of the castables were investigated. The results show that.（ 1 ）with zircon addition increasing, shrinkage in dimensions of specimens decreases, bulk density increases; strength of specimens fired at 1 200 ℃ slightly decreases and strength of specimens after carbon embedded fired at 1 500 ℃ firstly in- creases and then decreases; （2）the added zircon can not improve the thermal shock resistance of speci- mens;（3） when zircon addition is 6% ,the wear resistance of the specimens is the best.

关 键 词：锆英石 莫来石-碳化硅浇注料 抗热震性能 耐磨性能 

分 类 号：TQ175.79[化学工程—硅酸盐工业]