添加ZrO_2-SiC复合粉及工业SiC粉对刚玉耐火材料性能的影响  

Effects of ZrO_2-SiC Composite Powders and Commercial SiC Powder on the Properties of Corundum Refractory Material

作　　者：周秀丽[1] 黄海[2] 马北越[3] 于景坤[3] 

机构地区：[1]上海梅山钢铁股份有限公司炼钢厂,江苏南京210039 [2]上海梅山钢铁股份有限公司制造管理部,江苏南京210039 [3]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《工业加热》2014年第4期49-51,共3页Industrial Heating

基　　金：辽宁省教育厅基金资助(L2012079);中央高校教育部基本科研业务费资助(N120402006)

摘　　要：研究了利用碳热还原锆英石于1 600℃下保温4 h合成的ZrO2-SiC复合粉以及工业SiC粉添加剂对刚玉耐火材料体积密度、常温抗折强度、常温耐压强度及抗热震性能的影响。结果表明,随添加剂用量的增加,耐火材料的体积密度、抗折强度和耐压强度逐渐增加。添加ZrO2-SiC复合粉的质量分数为4%或SiC的粉的质量分数为6%后,耐火材料的体积密度最大,分别为3.04和2.96 g·cm-3;添加ZrO2-SiC复合粉的质量分数为4%的耐火材料的抗折强度为35.38 MPa;当添加ZrO2-SiC复合粉或SiC粉的质量分数为6%时,耐火材料的耐压强度最高,分别为53.44和51.56MPa,且其强度保持率最高,抗热震性最好。The corundum refractory material was prepared using ZrO2-SiC composite powders synthesized by carbothermal reduction of zircon at 1 600 ℃ for 4 h and commercial SiC powder as the additives, and the effects of them on bulk density, cold flexural strength, cold crushing strength and thermal shock resistance of the material were studied. The results showed that the bulk density, flexural strength and crushing strength of the material increased with increasing the additives amounts. The bulk densities of the material doped with 4%ZrO2-SiC composite powders or 6% SiC powder reached their maximum values, and they were 3.04 and 2.96 g·cm-3, respectively. The flexural strength of the material by addition of 4% ZrO2-SiC was 35.38 MPa. The corundum material doped with 6% ZrO2-SiC composite powders or SiC powder had the highest crushing strength and conservation rate of strength, and it displayed good thermal shock resistance.

关 键 词：ZrO2-SiC SIC 刚玉耐火材料 强度 抗热震性 

分 类 号：TQ175[化学工程—硅酸盐工业]