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Effect of Al on Spinel Phase Evolution of Al2O3-MgO Refractories at 1 600 ℃ in Nitrogen
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Mingwei YAN1, 2, Kaiqi LIU1, 2, Yong LI3, Dongfang LIU4, Shanghao TONG3, Guangchao SUN1, 2, Rui XIONG1
Journal of the Chinese Ceramic Society | 2020, 48(12) : 1997 - 2003
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Journal of the Chinese Ceramic Society | 2020, 48(12): 1997-2003
Effect of Al on Spinel Phase Evolution of Al2O3-MgO Refractories at 1 600 ℃ in Nitrogen
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Mingwei YAN1, 2, Kaiqi LIU1, 2, Yong LI3, Dongfang LIU4, Shanghao TONG3, Guangchao SUN1, 2, Rui XIONG1
Affiliations
  • 1.Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190
  • 2.Nanjing IPE Institute of Green Manufacturing Industry, Nanjing 211135
  • 3.School of Materials Sciences and Engineering, University of Sciences and Technology Beijing, Beijing 100083
  • 4.The Fourth Construction Co., Ltd. of CSCEC 7th Division, Xian 710000, China

    • YAN Mingwei (1989-), male, Ph.D.. E-mail:

About Author:

YAN Mingwei (1989-), male, Ph.D.. E-mail:

Published: 2020-12-20 doi: 10.14062/j.issn.0454-5648.20200419
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Effect of Al on the spinel evolution within Al2O3-MgO refractories in nitrogen at 1 600 ℃ was investigated. The results show that Al can markedly change the composition, morphology and reaction path of spinel phase within Al2O3-MgO refractories. Without Al addition, MgO reacts with Al2O3 to form spinel, and then spinel reacts with Al2O3 encompassed by itself to form once-rich-Al2O3 spinel. When the oxygen partial pressure by C-O2 consumed oxygen reaction decreases, MgO becomes unstable and decomposes into Mg(g) and O2; Mg(g) diffuses and transfers along pores or gaps in the materials, reacting with rich-Al2O3 spinel to generate new rich-Al2O3 spinel and Al(g), Al(g) is nitrided as AlN and then AlN dissolves into rich-Al2O3 spinel to form MgAlON. Al(g) and Al2O(g) diffuse and transfer along pores or gaps in the materials after introduction of Al into Al2O3-MgO refractory. Al(g) and Al2O(g) change into AlN and further dissolve into rich-Al2O3 spinel, enhancing N content of MgAlON. Also, in the gas-gas reaction system, Al(g)/Al2O(g), Mg(g), N2 and O2 react with each other to form flake MgAlON.

magnesium gaseous magnesium  /  rich-aluminium oxide spinel  /  magnesium aluminium oxynitride spinel  /  gas phases containing aluming
闫明伟, 刘开琪, 李勇, 刘东方, 仝尚好, 孙广超, 熊瑞. 1 600 ℃氮气气氛下Al对Al2O3-MgO材料中尖晶石物相演变的影响. 硅酸盐学报, 2020 , 48 (12) : 1997 -2003 . DOI: 10.14062/j.issn.0454-5648.20200419
Mingwei YAN, Kaiqi LIU, Yong LI, Dongfang LIU, Shanghao TONG, Guangchao SUN, Rui XIONG. Effect of Al on Spinel Phase Evolution of Al2O3-MgO Refractories at 1 600 ℃ in Nitrogen[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (12) : 1997 -2003 . DOI: 10.14062/j.issn.0454-5648.20200419
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Year 2020 volume 48 Issue 12
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Article Info
doi: 10.14062/j.issn.0454-5648.20200419
  • Receive Date：2020-06-15
  • Online Date：2026-10-30
  • Published：2020-12-20
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History
  • Received：2020-06-15
  • Revised：2020-06-25
Funding
Affiliations
    1.Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190
    2.Nanjing IPE Institute of Green Manufacturing Industry, Nanjing 211135
    3.School of Materials Sciences and Engineering, University of Sciences and Technology Beijing, Beijing 100083
    4.The Fourth Construction Co., Ltd. of CSCEC 7th Division, Xian 710000, China

Corresponding:

LIU Kaiqi (1969-), male, Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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