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Calcination Kinetics of α-Al2O3 by Multiple Scanning Method
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Ting ZOU1, 2, Zhonglin LI1, 2, Ding WANG1, 2, Fengcheng LYU1, 2, Weiguang ZHANG1, 2, Yibing LI1, 2, Xuexian JIANG3
Mining and Metallurgical Engineering | 2024, 44(2) : 106 - 111
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Mining and Metallurgical Engineering | 2024, 44(2): 106-111
• METALLURGY •
Calcination Kinetics of α-Al2O3 by Multiple Scanning Method
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Ting ZOU1, 2, Zhonglin LI1, 2, Ding WANG1, 2, Fengcheng LYU1, 2, Weiguang ZHANG1, 2, Yibing LI1, 2, Xuexian JIANG3
Affiliations
  • 1.School of Materials Science and Engineering, Guilin University of Technology, Guilin 541000, Guangxi, China
  • 2.Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guilin University of Technology, Guilin 541000, Guangxi, China
  • 3.School of Metallurgical and Resources Engineering, Guilin University of Technology at Nanning, Nanning 530000, Guangxi, China
Published: 2024-04-01 doi: 10.3969/j.issn.0253-6099.2024.02.026
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With aluminum hydroxide powder as raw material, aluminum hydroxide was roasted into α-Al2O3, and the phase transformation and microstructure change during the process were investigated. Then, the kinetics of the calcination process was calculated by simulation with multiple scanning method. It is found that the optimum conditions for aluminum hydroxide calcinated into α-Al2O3 are as follows: calcination temperature of 1200 ℃, time of 2 h, heating rate of 5 ℃/min. Three endothermic peaks can be observed during the calcination process of aluminum hydroxide, corresponding to three weightlessness stages. In the first stage of reaction, the function of mechanism is G (α)=[(1-α)-1/3-1]2, the average activation energy is 91.16 kJ/mol and the pre-exponential factor is between 17.00×109 and 44.03×109 min-1. In the second stage of reaction, the function of mechanism is G (α)=α2, the average activation energy is 106.2 kJ/mol and the pre-exponential factor is between 7.70×109 min-1 and 18.60×109 min-1. In the third stage of reaction, the function of mechanism is G (α)=α1/4, the average activation energy is 235.42 kJ/mol, and the pre-exponential factor is between 39.94×109 and 50.79×109 min-1.

aluminum hydroxide  /  aluminum oxide  /  calcination  /  phase transformation  /  α-Al2O3  /  thermal analysis  /  kinetics  /  multiple scanning method
Ting ZOU, Zhonglin LI, Ding WANG, Fengcheng LYU, Weiguang ZHANG, Yibing LI, Xuexian JIANG. Calcination Kinetics of α-Al2O3 by Multiple Scanning Method[J]. Mining and Metallurgical Engineering, 2024 , 44 (2) : 106 -111 . DOI: 10.3969/j.issn.0253-6099.2024.02.026
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Year 2024 volume 44 Issue 2
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doi: 10.3969/j.issn.0253-6099.2024.02.026
  • Receive Date：2023-11-01
  • Online Date：2026-03-19
  • Published：2024-04-01
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  • Received：2023-11-01
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Affiliations
    1.School of Materials Science and Engineering, Guilin University of Technology, Guilin 541000, Guangxi, China
    2.Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guilin University of Technology, Guilin 541000, Guangxi, China
    3.School of Metallurgical and Resources Engineering, Guilin University of Technology at Nanning, Nanning 530000, Guangxi, China
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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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