催化剂种类对低碳MgO-C耐火材料常温性能的影响  

Effect of catalyst types on cold properties of low carbon MgO-C refractories

作　　者：李亚格 王军凯 段红娟[1] 梁峰[1] 张海军[1] Li Yage;Wang Junkai;Duan Hongjuan;Liang Feng;Zhang Haijun(不详;State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]河南理工大学材料科学与工程学院河南省深地材料科学与技术重点实验室,河南焦作454003

出　　处：《耐火材料》2022年第3期197-201,共5页Refractories

基　　金：国家自然科学基金面上资助项目(52072274,51872210);省部共建耐火材料与冶金国家重点实验室开放基金(G201904);河南理工大学博士基金(B2019-40);河南省科技攻关计划(21210221589)。

摘　　要：以电熔镁砂、鳞片石墨和Si粉为原料,以掺入硝酸铁、硝酸钴和硝酸镍的酚醛树脂为结合剂,通过原位催化热解酚醛树脂的方法,在氩气气氛下,分别经800、1100和1400℃热处理,制备了低碳MgO-C耐火材料。研究了不同催化剂对低碳MgO-C耐火材料常温性能的影响,结果表明:硝酸铁为最佳的催化剂,硝酸铁的引入促进了碳纳米管(CNTs)和SiC晶须的原位生成,提高了耐火材料的力学性能。含硝酸铁的酚醛树脂加入试样时,经1100℃热处理后其常温抗折强度和常温耐压强度最高。Low carbon MgO-C refractories were prepared through in-situ catalytic pyrolysis of phenolic resin,using fused magnesia,flake graphite and silicon powders as raw materials,and phenolic resin added with iron nitrate,cobalt nitrate or nickel nitrate as the binder,firing in argon atmosphere at 800,1100 and 1400℃,respectively.The effects of the catalyst types on the cold properties of the low carbon MgO-C refractories were studied.The results show that iron nitrate is the best catalyst,which promotes the in-situ formation of CNTs and SiC_(w) and improves the mechanical properties of refractories.With the phenolic resin containing iron nitrate,the sample after heat treatment at 1100℃has the highest cold modulus of rupture and cold compressive strength.

关 键 词：低碳MgO-C耐火材料 碳纳米管 碳化硅晶须 力学性能 

分 类 号：TQ175.75[化学工程—硅酸盐工业]