氮化硅结合碳化硅耐火材料抗铝电解质侵蚀性能的研究  

Study on corrosion resistance of Si_(3)N_(4)-SiC refractory to aluminum electrolyte

作　　者：马龙斌 孟红涛 王允 孟祥军 Ma Longbin;Meng Hongtao;Wang Yun;Meng Xiangjun(Puyang Refractories Group Co.,Ltd.,Puyang 457100,China;Puyang Punai Functional Materals Co.,Ltd.,Puyang 457000,China)

机构地区：[1]濮阳濮耐高温材料(集团)股份有限公司,濮阳457100 [2]濮阳市濮耐功能材料有限公司,濮阳457000

出　　处：《耐火与石灰》2022年第4期49-51,55,共4页Refractories & Lime

摘　　要：以干压成型的方法制备了氮化硅结合碳化硅坯体,并采用反应烧结法氮化烧成。测试不同硅粉添加量与烧成试样不同体积密度下材料抗铝电解质侵蚀性能的变化。结果表明:硅粉添加量为16%时试样的抗铝电解质侵蚀能力最佳;伴随显气孔率的降低及气孔半径的减小,材料体积密度会增大,而熔渣侵入的速度也随之大幅下降。体积密度控制在2.65 g/cm^(3)以上,材料具有很好的抗冰晶石侵蚀性能。SiN-SiC body was prepared by dry pressing and sintered by nitridation reaction sintering method.The changes aluminum electrolyte corrosion resistance of matetials with different amounts of silica powder additions and different bulk densities of sintered samples were studied.The results show that when the amount of silicon powder is 16%,the corrosion resistance of aluminum electrolyte is the best.With the decrease of apparent porosity and pore radius,the bulk density of the material will increase,and the penetration rate of slag will also decrease greatly.The bulk density is controlled above 2.65 g/cm^(3),and the material has good cryolite corrosion resistance.

关 键 词：氮化硅结合碳化硅耐火材料 抗铝电解质侵蚀 硅粉 体积密度 

分 类 号：TQ175.71[化学工程—硅酸盐工业]