添加剂对MA和MgO-MA材料性能的影响

发布时间：2018-04-22 10:01

本文选题：镁铝尖晶石 + 方镁石-镁铝尖晶石　；参考：《硅酸盐通报》2017年11期

【摘要】：综述了金属氧化物、稀土氧化物以及复合添加剂对镁铝尖晶石(MA)和方镁石-镁铝尖晶石(MgO-MA)材料性能的影响及其作用机理。引入的添加剂在一定温度下能与镁铝尖晶石形成固溶体,或可提高镁铝尖晶石晶体空位浓度,活化晶格,或与材料中某些杂质反应生成低熔点物相,促进了试样的烧结,从而使常温力学性能提高。有些添加剂的引入还能与材料中某些物质发生反应生成高熔点相,堵塞气孔,阻挡了熔渣的渗透,增加材料抗侵蚀性能等。本文期望能为从事MA与MgO-MA材料性能、结构设计以及合理选择添加剂提供理论基础。
[Abstract]:The effects of metal oxides, rare earth oxides and composite additives on the properties of magnesia-aluminum spinel (MAA) and periclase-magnesia-aluminum-spinel (MgO-MA) materials were reviewed. The introduced additives can form solid solution with magnesia-aluminum spinel at a certain temperature, or increase the vacancy concentration of magnesia-aluminum-spinel crystal, activate the lattice, or react with some impurities in the material to form low melting point phase, thus promoting the sintering of the sample. Thus the mechanical properties at room temperature are improved. Some additives can react with some materials to form a high melting point phase, block the penetration of slag, and increase the corrosion resistance of the material. This paper is expected to provide a theoretical basis for the performance, structural design and rational selection of additives for MA and MgO-MA materials.
【作者单位】：郑州大学河南省高温功能材料重点实验室;
【基金】：国家自然科学基金面上项目(51672253) 河南省重点科技攻关项目(152102410014) 河南省科技厅基础研究项目(162300410044) 武汉科技大学开放基金(G201601)
【分类号】：TQ175.1

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