D0L:10.13374f.issn1001-053x.2011.11.002 第33卷第11期 北京科技大学学报 Vol.33 No.11 2011年11月 Journal of University of Science and Technology Beijing Now.2011 MgAION结合镁质、镁铝尖晶石质与刚玉质材料的组 织与性能 程 竹1,2)回 孙加林”吴学真》陈肇友》王金相2》万龙刚2) 1)北京科技大学材料科学与工程学院，北京1000832)中钢集团洛阳耐火材料研究院，洛阳471039 ☒通信作者，E-mail:zhiliangchu2005@sohu.com 摘要采用反应烧结法制备了MgA1ON结合的镁质、镁铝尖晶石质和刚玉质试样，研究了不同主晶相对MgAION单相结合 相形成温度的影响及化学反应引起的体积膨胀和氧化物挥发对材料烧结的影响.结果表明：虽然用以形成MgAlON结合相的 混合细粉的组成和数量都相同，但MgAlON结合的镁质、镁铝尖品石质和刚玉质试样中形成MgAION单相结合相的温度是不 同的，依次呈升高趋势：MgAION结合镁质试样在烧成过程中体积显著膨胀，MgO大量挥发，烧后试样镁砂颗粒和基质结合松 散，密度低，强度小；MgAO结合刚玉试样在烧成过程中体积膨胀小，氧化物挥发少，烧后试样刚玉颗粒和基质结合紧密，密 度较高，强度较大：而MgAION结合镁铝尖品石试样烧成过程中的体积膨胀量、氧化物挥发量，烧后试样颗粒和基质的结合程 度、密度和强度都介于前两者之间. 关键词耐火材料：氧化镁：氧化铝：刚玉：烧结：组织：耐压强度 分类号T0175.7 Microstructure and properties of MgAlON-bonded magnesia,magnesia-alumi- na spinel and corundum materials CHENG Zhu'2,SUN Jia-in'》,WU Xue--hen》,CHEN Zhao-you,WANGJin-xiang.》,WAN Long-gang》 1)School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Sinosteel Corporation Luoyang Institute of Refractories Research,Luoyang 471039,China Corresponding author,E-mail:zhiliangchu2005@sohu.com ABSTRACT MgAlON-bonded magnesia,magnesia-alumina spinel and corundum materials were prepared by reaction sintering.The influence of different major phases on the formation temperature of single MgAlON bonding phase and that of volume expansion caused by chemical reactions and the vapouring of oxides on the sintering of the materials were studied.The results show that athough the mixed powders used to form MgAlON bonding phase have the same composition and the same amount,the temperatures at which single MgAlON bonding phase forms in MgAlON-bonded magnesia,magnesia-alumina spinel and corundum samples are different,and rise in turn.On the matter of MgAlON-bonded magnesia samples,the volume expands significantly and a big amount of Mgo vapours during the sintering process,magnesia grains bond loosely with the matrix in the fired samples,and thus the samples have low bulk density and low compressive strength.For MgAlON-bonded corundum samples,the volume expands slightly and a small amount of oxides vapours during the sintering process,corundum grains bond tightly with the matrix in the fired samples,and therefore the samples have high bulk density and high compressive strength.As to MgAlON-bonded magnesia-alumina spinel samples,the volume expansion and the amount of oxides vapoured during the sintering process,the bonding between grains and the matrix in the fired samples,and the bulk density and compressive strength of the fired samples are all between those of the above two kinds of samples. KEY WORDS refractories:magnesia:alumina:corundum:sintering:microstructure:compressive strength 目前，国内外炉外精炼主要使用Mg0-Ca0、镁 精炼渣的侵蚀是炉外精炼用耐火材料损毁的主要原 铬、Mg0-C、Mg0-Ca0-C和Al,0,-C质耐火材料. 因之一·上述几种耐火材料虽有较好的抗精炼渣侵 收稿日期：2010-0908第 33 卷 第 11 期 2011 年 11 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 33 No． 11 Nov． 2011 MgAlON 结合镁质、镁铝尖晶石质与刚玉质材料的组 织与性能 程 竹1，2) 孙加林1) 吴学真2) 陈肇友2) 王金相1，2) 万龙刚2) 1) 北京科技大学材料科学与工程学院，北京 100083 2) 中钢集团洛阳耐火材料研究院，洛阳 471039 通信作者，E-mail: zhiliangchu2005@ sohu． com 摘 要 采用反应烧结法制备了 MgAlON 结合的镁质、镁铝尖晶石质和刚玉质试样，研究了不同主晶相对 MgAlON 单相结合 相形成温度的影响及化学反应引起的体积膨胀和氧化物挥发对材料烧结的影响． 结果表明: 虽然用以形成 MgAlON 结合相的 混合细粉的组成和数量都相同，但 MgAlON 结合的镁质、镁铝尖晶石质和刚玉质试样中形成 MgAlON 单相结合相的温度是不 同的，依次呈升高趋势; MgAlON 结合镁质试样在烧成过程中体积显著膨胀，MgO 大量挥发，烧后试样镁砂颗粒和基质结合松 散，密度低，强度小; MgAlON 结合刚玉试样在烧成过程中体积膨胀小，氧化物挥发少，烧后试样刚玉颗粒和基质结合紧密，密 度较高，强度较大; 而 MgAlON 结合镁铝尖晶石试样烧成过程中的体积膨胀量、氧化物挥发量，烧后试样颗粒和基质的结合程 度、密度和强度都介于前两者之间． 关键词 耐火材料; 氧化镁; 氧化铝; 刚玉; 烧结; 组织; 耐压强度 分类号 TQ175. 7 Microstructure and properties of MgAlON-bonded magnesia，magnesia-alumi￾na spinel and corundum materials CHENG Zhu1，2) ，SUN Jia-lin1) ，WU Xue-zhen2) ，CHEN Zhao-you2) ，WANG Jin-xiang1，2) ，WAN Long-gang2) 1) School of Materials Science and Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) Sinosteel Corporation Luoyang Institute of Refractories Research，Luoyang 471039，China Corresponding author，E-mail: zhiliangchu2005@ sohu． com ABSTRACT MgAlON-bonded magnesia，magnesia-alumina spinel and corundum materials were prepared by reaction sintering． The influence of different major phases on the formation temperature of single MgAlON bonding phase and that of volume expansion caused by chemical reactions and the vapouring of oxides on the sintering of the materials were studied． The results show that athough the mixed powders used to form MgAlON bonding phase have the same composition and the same amount，the temperatures at which single MgAlON bonding phase forms in MgAlON-bonded magnesia，magnesia-alumina spinel and corundum samples are different，and rise in turn． On the matter of MgAlON-bonded magnesia samples，the volume expands significantly and a big amount of MgO vapours during the sintering process，magnesia grains bond loosely with the matrix in the fired samples，and thus the samples have low bulk density and low compressive strength． For MgAlON-bonded corundum samples，the volume expands slightly and a small amount of oxides vapours during the sintering process，corundum grains bond tightly with the matrix in the fired samples，and therefore the samples have high bulk density and high compressive strength． As to MgAlON-bonded magnesia-alumina spinel samples，the volume expansion and the amount of oxides vapoured during the sintering process，the bonding between grains and the matrix in the fired samples，and the bulk density and compressive strength of the fired samples are all between those of the above two kinds of samples． KEY WORDS refractories; magnesia; alumina; corundum; sintering; microstructure; compressive strength 收稿日期: 2010--09--08 目前，国内外炉外精炼主要使用 MgO--CaO、镁 铬、MgO--C、MgO--CaO--C 和 Al2O3--C 质耐火材料． 精炼渣的侵蚀是炉外精炼用耐火材料损毁的主要原 因之一． 上述几种耐火材料虽有较好的抗精炼渣侵 DOI:10.13374/j.issn1001-053x.2011.11.002