复合添加Al和TiO_2对低碳镁碳砖基质物相组成及性能的影响  

Effect of additives Al and TiO_2 on the matrix phase composition and properties of low carbon MgO-C bricks

作　　者：夏忠锋[1] 王周福[1] 王玺堂[1] 刘浩[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：《武汉科技大学学报》2013年第1期45-48,58,共5页Journal of Wuhan University of Science and Technology

基　　金：湖北省自然科学基金重点项目(2009CDA050)

摘　　要：以电熔镁砂、超细鳞片石墨为主要原料,以热固性酚醛树脂为结合剂,添加Al和TiO2制备低碳镁碳砖,研究复合引入Al粉和TiO2对低碳镁碳砖基质物相组成及性能的影响。结果表明,埋炭热处理后,添加剂与基质反应生成新相MgAl2O4和TiN或Ti(C,N),使低碳镁碳砖的抗氧化性能明显提高,材料的强度显著增加;此外,添加剂的复合引入有利于改善单独引入Al粉时镁碳砖埋炭处理后易水化的问题。Low carbon MgO-C bricks were prepared with fused magnesia and fine flake graphite as the raw materials,thermosetting phenol-formaldehyde resin as the binder,added with Al and TiO2.The effect of additives Al and TiO2 on the matrix phase composition and properties of low carbon MgO-C bricks were investigated.The matrix phase composition was analyzed by XRD,and the microstructure was characterized by SEM and EDS.The results show that the formation of MgAl2O4 and TiN or Ti（C,N） from the reaction of additives with the matrix can significantly improve the oxidation resistance and cold crush strength of low carbon MgO-C bricks.In addition,the addition of Al and TiO2 can avoid the formation of Al4C3 and prevent the bricks from hydration.

关 键 词：低碳镁碳砖 添加剂 TIN TI(C N) 镁铝尖晶石 

分 类 号：TB332[一般工业技术—材料科学与工程]