Peng Jiang, Jun-hong Chen, Ming-wei Yan, Bin Li, Jin-dong Su, and Xin-mei Hou, Morphology characterization of periclase–hercynite refractories by reaction sintering, Int. J. Miner. Metall. Mater., 22(2015), No. 11, pp. 1219-1224. https://doi.org/10.1007/s12613-015-1188-6
Cite this article as:
Peng Jiang, Jun-hong Chen, Ming-wei Yan, Bin Li, Jin-dong Su, and Xin-mei Hou, Morphology characterization of periclase–hercynite refractories by reaction sintering, Int. J. Miner. Metall. Mater., 22(2015), No. 11, pp. 1219-1224. https://doi.org/10.1007/s12613-015-1188-6
Peng Jiang, Jun-hong Chen, Ming-wei Yan, Bin Li, Jin-dong Su, and Xin-mei Hou, Morphology characterization of periclase–hercynite refractories by reaction sintering, Int. J. Miner. Metall. Mater., 22(2015), No. 11, pp. 1219-1224. https://doi.org/10.1007/s12613-015-1188-6
Citation:
Peng Jiang, Jun-hong Chen, Ming-wei Yan, Bin Li, Jin-dong Su, and Xin-mei Hou, Morphology characterization of periclase–hercynite refractories by reaction sintering, Int. J. Miner. Metall. Mater., 22(2015), No. 11, pp. 1219-1224. https://doi.org/10.1007/s12613-015-1188-6
A periclase-hercynite brick was prepared via reaction sintering at 1600℃ 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.
A periclase-hercynite brick was prepared via reaction sintering at 1600℃ 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.
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