耐火材料 ›› 2025, Vol. 59 ›› Issue (4): 302-306.DOI: 10.3969/j.issn.1001-1935.2025.04.005

• 研究开发 • 上一篇    下一篇

Y2O3添加量对低碳镁碳质耐火材料性能的影响

韩东序1,2), 佘亚锋2), 张志成1)   

  1. 1)天津大学 化工学院 天津 300000
    2)长兴明天炉料有限公司 浙江湖州 313100
  • 收稿日期:2024-12-17 发布日期:2025-08-18
  • 作者简介:韩东序:男,1990年生,博士,讲师。E-mail:hdxzzu@163.com

Effect of Y2O3 addition on properties of low-carbon magnesia carbon refractories

Han Dongxu, She Yafeng, Zhang Zhicheng   

  1. First author's address:School of Chemical Engineering and Technology,Tianjin University,Tianjin 300000,China
  • Received:2024-12-17 Published:2025-08-18

摘要: 为了改善低碳镁碳质耐火材料的常温使用性能,以电熔镁砂、鳞片石墨和金属铝粉为原料,Y2O3为添加剂,酚醛树脂为结合剂,在氩气气氛中经1 700 ℃保温3 h热处理制备了低碳镁碳耐火材料。研究了Y2O3的添加量(添加质量分数分别为0、0.2%、0.5%、1%、1.2%和1.5%)对低碳镁碳材料物相组成、显微结构和力学性能的影响。结果表明:1)引入的Y2O3可以和基质中的SiO2和Al2O3反应生成稀土化合物,并在烧结过程中充当晶粒间的结合物或者填充在颗粒间的缝隙中,提升材料的致密性,进而提高其力学性能。2) 当Y2O3的添加量为0.2%(w)时,试样的综合性能最佳,其体积密度、显气孔率和常温抗折强度分别为2.83 g·cm-3、9.92%和 6.98 MPa,抗热震性良好。

关键词: 低碳镁碳材料, 氧化钇, 抗热震性

Abstract: To improve their cold performance,low-carbon magnesia carbon refractories were prepared with fused magnesia,flake graphite and aluminum powder as raw materials,Y2O3 as an additive,and phenolic resin as the binder by heat treatment in N2 at 1 700 ℃ for 3 h.The effects of the Y2O3 addition (0,0.2%,0.5%,1%,1.2% and 1.5%,by mass) on the phase composition,microstructure and mechanical properties of the specimens were investigated.The results show that:(1) the introduced Y2O3 can react with the SiO2 and Al2O3 in the matrix to form rare-earth compounds,and act as a bonding phase between grains or fill the gaps between particles during sintering,enhancing the density of the materials and thereby improving their mechanical properties;(2) the specimen with 0.2% Y2O3 exhibits the optimal comprehensive performance,with the bulk density of 2.83 g·cm-3,apparent porosity of 10.1%,and cold modulus of rupture of 6.98 MPa,as well as good thermal shock resistance.

Key words: low-carbon magnesia carbon refractories, yttria, thermal shock resistance

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