| 混合稀土氧化物对镁质耐火材料结构与性能的影响 |
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| 引用本文： | 王周福,徐自伟,张保国,王玺堂.混合稀土氧化物对镁质耐火材料结构与性能的影响[J].稀有金属材料与工程,2007,36(A02):373-375. |
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| 作者姓名： | 王周福 徐自伟 张保国 王玺堂 |
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| 作者单位： | 武汉科技大学高温陶瓷与耐火材料湖北省重点实验室,湖北武汉430081 |
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| 基金项目： | 湖北省耐火材料与高温陶瓷重点实验室项目（J20405） |
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| 摘 要： | 研究了添加Y2O2的混合稀土氧化物对镁质耐火材料的烧结性、力学性能和显微结构的影响。结果表明：添加含Y2O3的混合稀土氧化物可以促进镁质耐火材料的烧结，提高材料的力学性能，同时改善材料的组织结构。含Y2O3的混合稀土氧化物的添加，使镁质耐火材料的结合方式由硅酸盐相结合转化为高熔点的稀土硅酸盐相结合，从而导致镁质耐火材料的高温强度得到显著地提高。
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| 关 键 词： | 镁质耐火材料 混合稀土氧化物 烧结性能 显微结构 高温强度 |
| 文章编号： | 1002-185X（2007）S2-373-03 |
| 修稿时间： | 2007-02-25 |
Effect of Mixture of Rare Earth Oxides on Microstructure and Properties of Magnesia Refractory |
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| Wang Zhoufu, Xu Ziwei, Zhang Baoguo, Wang Xitang.Effect of Mixture of Rare Earth Oxides on Microstructure and Properties of Magnesia Refractory[J].Rare Metal Materials and Engineering,2007,36(A02):373-375. |
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| Authors: | Wang Zhoufu Xu Ziwei Zhang Baoguo Wang Xitang |
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| Affiliation: | Hubei Province Key Laboratory of Ceramics and Refractories, Wuhan University of Science and Technology, Wuhan 430081, China |
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| Abstract: | The effect of mixture of rare earth oxides on the sintering properties, microstructure and mechanical properties of magnesia refractory were studied. The experimental results showed that the bulk density can be increased; the microstructure and mechanical properties can be improved by adding mixture of rare earth oxides in magnesia refractory. With addition of the mixture of rare earth oxides with Y2O3, the bonding between the magnesia and low melting silicates was replaced by the bonding between the magnesia and high melting silicates containing rare earth in the matrix of magnesia refractory. Due to the evolution of microstructure, the high temperature bending strength of magnesia refractory was improved greatly |
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| Keywords: | magnesia refractory mixture of rare earth oxides sintering property microstructure high temperature bending strength |
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