TiO2加入量对铝镁质干式捣打料性能的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (1): 323-329.

所属专题：耐火材料

TiO₂加入量对铝镁质干式捣打料性能的影响

许欢¹, 王玺堂², 张汪年¹, 邓宁¹, 李世斌¹

1.九江学院机械与材料工程学院,九江 332005;
2.武汉科技大学,省部共建耐火材料与冶金国家重点实验室,武汉 430081

收稿日期:2020-08-22 修回日期:2020-09-22 出版日期:2021-01-15 发布日期:2021-02-07
通讯作者: 王玺堂,博士,教授。E-mail:wangxt_wust@126.com
作者简介:许欢(1987—),男,博士研究生。主要从事耐火材料设计与制备研究。E-mail:xuhuan_wust@126.com
基金资助:
国家自然科学基金(51672195,51474166)

Effect of TiO₂ Content on Performences of AluminumMagnesium Dry Ramming Materials

XU Huan¹, WANG Xitang², ZHANG Wangnian¹, DENG Ning¹, LI Shibin¹

1. School of Mechanical and Material Engineering,Jiujiang University,Jiujiang 332005,China;
2. State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China

Received:2020-08-22 Revised:2020-09-22 Online:2021-01-15 Published:2021-02-07

摘要/Abstract

摘要： 以电熔白刚玉、电熔镁砂、活性Al₂O₃微粉为主要原料,以TiO₂为烧结剂,分别在1 300 ℃、1 400 ℃、1 500 ℃和1 600 ℃热处理3 h制备铝镁质干式捣打料。研究了TiO₂加入量、热处理温度对捣打料物相、烧结性能、力学性能及显微结构的影响。结果表明,适量TiO₂的引入能显著促进铝镁质干式捣打料的反应烧结,常温和高温力学性能均得到明显改善。其烧结性能强化的原因主要是镁铝钛相的形成及TiO₂掺入尖晶石晶格形成阳离子空位。当TiO₂添加量为0.5%(质量分数)时,经1 600 ℃热处理3 h制得的干式捣打料具有良好的综合性能,此时线膨胀率为3.7%,体积密度和显气孔率分别为2.76 g·cm^-3和26.6%,耐压强度为18.9 MPa,高温抗折强度(HMOR)为1.9 MPa。当TiO₂加入过多时,捣打料会出现过烧现象,产生较大收缩,对材料的体积稳定产生不利影响。

关键词: TiO₂, 烧结剂, 感应炉炉衬, 铝镁尖晶石, 干式捣打料, 反应烧结

Abstract: Aluminum magnesium dry ramming materials were prepared through heat treatment at 1 300 ℃,1 400 ℃,1 500 ℃ and 1 600 ℃ for 3 h,using fused white corundum,fused magnesia,reactive Al₂O₃ powder as main raw materials,and TiO₂ as clinkering aid.The effects of TiO₂ content,sintering temperature on the phase composition,sintering properties,mechanical properties and microstructures of aluminum magnesium dry ramming materials were investigated.The results show that the introduction of moderate amount of TiO₂ significantly promotes the reaction sintering of aluminum magnesium dry ramming materials,the mechanical properties both at normal and elevated temperatures are improved obviously.The strengthening of sintering performance is attributed to the formation of magnesium aluminum titanium phase and cation vacancy caused by the incorporation of TiO₂ into spinel lattice.Good comprehensive properties are obtained after heat treatment at 1 600 ℃ for 3 h when the TiO₂ content is 0.5%(mass fraction).At this time,the liner change rate is 3.7%,the bulk density and the porosity is 2.76 g·cm^-3 and 26.6 % respectively,the cold crushing strength is 18.9 MPa,and the HMOR is 1.9 MPa.When the content of TiO₂ is excessive,aluminate magnesium spinel materials show a large shrinkage as a result of excessive sintering,which is not conducive to the volume stability of the materials.

Key words: TiO₂, clinkering aid, induction furnace lining, aluminum magnesium spinel, dry ramming material, reaction sintering

中图分类号:

TQ175

许欢, 王玺堂, 张汪年, 邓宁, 李世斌. TiO₂加入量对铝镁质干式捣打料性能的影响[J]. 硅酸盐通报, 2021, 40(1): 323-329.

XU Huan, WANG Xitang, ZHANG Wangnian, DENG Ning, LI Shibin. Effect of TiO₂ Content on Performences of AluminumMagnesium Dry Ramming Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 323-329.

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TiO₂加入量对铝镁质干式捣打料性能的影响

Effect of TiO₂ Content on Performences of AluminumMagnesium Dry Ramming Materials

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