A new synthetic route to MgO-MgAl2O4-ZrO2 highly dispersed composite material through formation of Mg5Al2.4Zr1.7O12 metastable phase:synthesis and physical properties

Peng Jiang; Guo-xiang Yin; Ming-wei Yan; Jia-lin Sun; Bin Li; Yong Li

doi:10.1007/s12613-017-1412-7

Volume 24 Issue 3

Mar. 2017

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文章导航 > 矿物冶金与材料学报（英文） > 2017 > 24(3): 332-341

Peng Jiang, Guo-xiang Yin, Ming-wei Yan, Jia-lin Sun, Bin Li, and Yong Li, A new synthetic route to MgO-MgAl₂O₄-ZrO₂ highly dispersed composite material through formation of Mg₅Al_2.4Zr_1.7O₁₂ metastable phase:synthesis and physical properties, Int. J. Miner. Metall. Mater., 24(2017), No. 3, pp. 332-341. https://doi.org/10.1007/s12613-017-1412-7

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Peng Jiang, Guo-xiang Yin, Ming-wei Yan, Jia-lin Sun, Bin Li, and Yong Li, A new synthetic route to MgO-MgAl2O4-ZrO2 highly dispersed composite material through formation of Mg5Al2.4Zr1.7O12 metastable phase:synthesis and physical properties, Int. J. Miner. Metall. Mater., 24(2017), No. 3, pp. 332-341. https://doi.org/10.1007/s12613-017-1412-7

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研究论文

A new synthetic route to MgO-MgAl₂O₄-ZrO₂ highly dispersed composite material through formation of Mg₅Al_2.4Zr_1.7O₁₂ metastable phase:synthesis and physical properties

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China

通讯作者:
Yong Li E-mail: yongli@mater.ustb.edu.cn

中文摘要

Mg₅Al_2.4Zr_1.7O₁₂ metastable phase was successfully synthesized from analytical-grade MgO, α-Al₂O₃, MgAl₂O₄, and ZrO₂ under an N₂ atmosphere. The sintering temperature was varied from 1650 to 1780℃, and the highest amount of Mg₅Al_2.4Zr_1.7O₁₂ appeared in the composite material when the sintering temperature was 1760℃. According to our research of the formation mechanism of Mg₅Al_2.4Zr_1.7O₁₂, the formation and growth of MgAl₂O₄ dominated when the temperature was not higher than 1650℃. When the temperature was higher than 1650℃, MgO and ZrO₂ tended to diffuse into MgAl₂O₄ and the Mg₅Al_2.4Zr_1.7O₁₂ solid solution was formed. When the temperature reached 1760℃, the formation of Mg₅Al_2.4Zr_1.7O₁₂ was completed. The effect of MgAl₂O₄ spinel crystals was also studied, and their introduction into the composite material promoted the formation and growth of Mg₅Al_2.4Zr_1.7O₁₂. A highly dispersed MgO-MgAl₂O₄-ZrO₂ composite material was prepared through the decomposition of the Mg₅Al_2.4Zr_1.7O₁₂ metastable phase. The as-prepared composite material showed improved overall physical properties because of the good dispersion of MgO, MgAl₂O₄, and ZrO₂ phases.

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Research Article

A new synthetic route to MgO-MgAl₂O₄-ZrO₂ highly dispersed composite material through formation of Mg₅Al_2.4Zr_1.7O₁₂ metastable phase:synthesis and physical properties

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Abstract

Abstract

Mg₅Al_2.4Zr_1.7O₁₂ metastable phase was successfully synthesized from analytical-grade MgO, α-Al₂O₃, MgAl₂O₄, and ZrO₂ under an N₂ atmosphere. The sintering temperature was varied from 1650 to 1780℃, and the highest amount of Mg₅Al_2.4Zr_1.7O₁₂ appeared in the composite material when the sintering temperature was 1760℃. According to our research of the formation mechanism of Mg₅Al_2.4Zr_1.7O₁₂, the formation and growth of MgAl₂O₄ dominated when the temperature was not higher than 1650℃. When the temperature was higher than 1650℃, MgO and ZrO₂ tended to diffuse into MgAl₂O₄ and the Mg₅Al_2.4Zr_1.7O₁₂ solid solution was formed. When the temperature reached 1760℃, the formation of Mg₅Al_2.4Zr_1.7O₁₂ was completed. The effect of MgAl₂O₄ spinel crystals was also studied, and their introduction into the composite material promoted the formation and growth of Mg₅Al_2.4Zr_1.7O₁₂. A highly dispersed MgO-MgAl₂O₄-ZrO₂ composite material was prepared through the decomposition of the Mg₅Al_2.4Zr_1.7O₁₂ metastable phase. The as-prepared composite material showed improved overall physical properties because of the good dispersion of MgO, MgAl₂O₄, and ZrO₂ phases.
- metastable phases;
- formation mechanisms;
- composite materials;
- refractory materials;
- synthesis;
- physical properties

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A new synthetic route to MgO-MgAl₂O₄-ZrO₂ highly dispersed composite material through formation of Mg₅Al_2.4Zr_1.7O₁₂ metastable phase:synthesis and physical properties

中文摘要

A new synthetic route to MgO-MgAl₂O₄-ZrO₂ highly dispersed composite material through formation of Mg₅Al_2.4Zr_1.7O₁₂ metastable phase:synthesis and physical properties

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