Morphology characterization of periclase–hercynite refractories by reaction sintering

被引：5

作者：

Peng Jiang ^{[1
]}

Jun-hong Chen ^{[1
]}

Ming-wei Yan ^{[1
]}

Bin Li ^{[1
]}

Jin-dong Su ^{[1
]}

Xin-mei Hou ^{[2
]}

机构：

[1] School of Materials Science and Engineering, University of Science and Technology Beijing

[2] Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing

来源：

International Journal of Minerals,Metallurgy and Materials | 2015年 / 22卷 / 11期

基金：

中央高校基本科研业务费专项资金资助;

关键词：

refractories; periclase; hercynite; sintering; morphology; diffusion;

D O I：

暂无

中图分类号：

TQ175.1 [基础理论];

学科分类号：

0805 ; 080502 ;

摘要：

A periclase?hercynite brick was prepared via reaction sintering at 1600°C for 6 h in air using magnesia and reaction-sintered hercynite as raw materials. The microstructure development of the periclase?hercynite brick during sintering was investigated using X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy in combination with energy-dispersive X-ray spectroscopy. The results show that during sintering, Fe2+, Fe3+ and Al3+ ions in hercynite crystals migrate and react with periclase to form(Mg1-xFex)(Fe2-yAly)O4 spinel with a high Fe/Al ratio. Meanwhile, Mg2+ in periclase crystals migrates into hercynite crystals and occupies the oxygen tetrahedron vacancies. This Mg2+ migration leads to the formation of(Mg1-uFeu)(Fe2-vAlv)O4 spinel with a lower Fe/Al ratio and results in Al3+ remaining in hercynite crystals. Cation diffusion between periclase and hercynite crystals promotes the sintering process and results in the formation of a microporous structure.

引用

页码：1219 / 1224

页数：6

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Jun-hong Chen
Ming-wei Yan
Bin Li
Jin-dong Su
Xin-mei Hou
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