Al2O3-SiC复合材料的合成及其对低碳MgO-C耐火材料性能的影响

J. Mater. Sci. Technol. ›› 2010, Vol. 26 ›› Issue (8): 715-720.

• Novel Processing and Characterization Methods • 上一篇下一篇

Al2O3-SiC复合材料的合成及其对低碳MgO-C耐火材料性能的影响

马北越¹,于景坤¹,朱强²

1. 东北大学
2. 东北大学材料与冶金学院

收稿日期:2009-10-09 修回日期:2010-03-03 出版日期:2010-08-28 发布日期:2010-08-23
通讯作者: 马北越
基金资助:
国家自然科学基金和宝钢集团公司基金联合资助

Synthesis of Al₂O₃-SiC Composite and Its Effect on the Properties of Low-carbon MgO-C Refractories

Beiyue Ma¹⁾, Qiang Zhu^1,2), Yong Sun^1,2), Jingkun Yu¹⁾, Ying Li¹⁾

1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
2) Faculty of Engineering, University of Wollongong, Wollongong, NSW 2522, Australia

Received:2009-10-09 Revised:2010-03-03 Online:2010-08-28 Published:2010-08-23
Contact: Beiyue Ma
Supported by:
the National Science and Technology Major Special Project (No. 2009ZX04006-032), the National Natural Science Foundation of China (No. 50274021) and Baoshan Iron and Steel Co., Ltd., China

摘要/Abstract

摘要：

以蜡石和天然石墨为原料，在Ar气氛下经碳热还原法合成出Al2O3-SiC复合材料，研究了合成温度对相组成和显微结构的影响。将合成的Al2O3-SiC复合材料作为添加剂制备出低碳MgO-C耐火材料，研究复合材料添加对耐火材料抗渣渗透和侵蚀以及抗氧化性能的影响，并讨论了Al2O3-SiC复合材料抗渣及抗氧化机理。结果表明，合成温度对Al2O3-SiC复合材料的制备产生重要影响；以蜡石和天然石墨为原料，在Ar气氛于1873~1973 K可以合成出Al2O3-SiC复合材料，且在1973 K温度下合成复合材料的颗粒尺寸为1~2 μm；通过添加合成的Al2O3-SiC复合材料可以明显改善低碳 MgO-C耐火材料的抗渣渗透和侵蚀性能，一定程度上改善其抗氧化性能。渣黏性的增加及MgAl2O4的形成能有效抑制渣对耐火材料的渗透和侵蚀。

关键词: 氧化物-非氧化物复合材料, 碳热还原, 渣渗透和侵蚀, 抗氧化性, 耐火材料

Abstract:

Al₂O₃-SiC composite was synthesized with pyrophyllite and natural graphite as raw materials by carbothermal reduction reaction under argon atmosphere. The effect of synthesis temperature on phase composition and microstructure was investigated. Low-carbon MgO-C refractories were prepared by using the synthesized Al₂O₃-SiC composite as additive. The effect of its addition on the slag penetration and corrosion resistance as well as oxidation resistance of the refractories was investigated, and the slag resistance and oxidation resistance mechanisms of the Al₂O₃-SiC composite were also discussed. The results show that the synthesis temperature has a great influence on preparation of Al₂O₃-SiC composite. The Al₂O₃-SiC composite can be synthesized at 1873-1973 K under argon atmosphere, with pyrophyllite and natural graphite as raw materials, and particle sizes of the composite synthesized at 1973 K are mainly distributed as 1-2 μm. The slag penetration and corrosion resistance of low-carbon MgO-C refractories can be remarkably improved by adding the synthesized Al₂O₃-SiC composite, and the oxidation resistance has an improvement to some extent. The increase of slag viscosity and the formation of MgAl₂O₄ can effectively inhibit the slag penetration and corrosion for the refractories.

Key words: Oxide-nonoxide composite, Carbothermal reduction, Penetration, Corrosion, Oxidation resistance, Refractories

马北越于景坤朱强. Al2O3-SiC复合材料的合成及其对低碳MgO-C耐火材料性能的影响[J]. J. Mater. Sci. Technol., 2010, 26(8): 715-720.

Beiyue Ma Qiang Zhu Yong Sun Jingkun Yu Ying Li. Synthesis of Al₂O₃-SiC Composite and Its Effect on the Properties of Low-carbon MgO-C Refractories[J]. J Mater Sci Technol, 2010, 26(8): 715-720.

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Al2O3-SiC复合材料的合成及其对低碳MgO-C耐火材料性能的影响

Synthesis of Al₂O₃-SiC Composite and Its Effect on the Properties of Low-carbon MgO-C Refractories

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Al2O3-SiC复合材料的合成及其对低碳MgO-C耐火材料性能的影响

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Synthesis of Al₂O₃-SiC Composite and Its Effect on the Properties of Low-carbon MgO-C Refractories