氧化镧对方镁石-镁橄榄石质耐火材料结构与性能的影响

耐火与石灰 ›› 2022, Vol. 47 ›› Issue (3): 11-15.

氧化镧对方镁石-镁橄榄石质耐火材料结构与性能的影响

朱宇轩刘浩王周福马妍王玺堂陈少一

武汉科技大学耐火材料与冶金国家重点实验室，武汉430081

出版日期:2022-06-10 发布日期:2022-05-18

Effects of La2O3 on structure and properties of periclase-forsterite refractories

Zhu Yuxuan Liu Hao Wang Zhoufu Ma Yan Wang Xitang Chen Shaoyi

The State Key Laboratory of Refractory and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

Online:2022-06-10 Published:2022-05-18

摘要/Abstract

摘要：

以电熔镁砂、硅微粉为主要原料，研究了氧化镧（La2O3）对方镁石-镁橄榄石质耐火材料结构与性能的影响。结果表明：氧化镧的引入及其含量的增加在主晶相晶粒间生成不规则状、棒状和针状的含镧硅酸盐相；该相的原位生成有助于提高材料的体积密度、降低显气孔率，并且在改善力学性能的同时，显著增强了材料的热震稳定性；含镧硅酸盐物相对显微结构的调节作用提高了材料抗玻璃配合料和硫酸钠的渗透能力。

关键词: 镁橄榄石, 耐火材料, 氧化镧, 力学性能, 抗侵蚀性能

Abstract:

The effects of La2O3 on the structure and properties of periclase-forsterite refractories were studied with fused magnesia and silica powder as main raw materials.The results showed that the introduction of La2O3 and their increase in content produce irregular,rod-shaped and needle-shaped lanthanum containing silicate phases between the main crystalline grains; The in-situ formation of the phases was conductive to improve the bulk density and decrease the apparent porosity of the materials,the mechanical properties and thermal shock resistance were also significantly enhanced；The enhanced microstructure from the in-situ formed lanthanum containing silicate phases elevated the penetration resistance of the materials to the melted glass batch and sodium sulfate.

Key words: Forsterite, Refractories, La2O3, Mechanical properties, Corrosion resistance

中图分类号:

TQ175.12

朱宇轩刘浩王周福马妍王玺堂陈少一. 氧化镧对方镁石-镁橄榄石质耐火材料结构与性能的影响[J]. 耐火与石灰, 2022, 47(3): 11-15.

Zhu Yuxuan Liu Hao Wang Zhoufu Ma Yan Wang Xitang Chen Shaoyi. Effects of La2O3 on structure and properties of periclase-forsterite refractories[J]. REFRACTORIES & LIME, 2022, 47(3): 11-15.

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