Research Progress on Phase Transition Mechanism and Preparation Technology of α-Al2O3

Abstract

Abstract: α-Al₂O₃ has important applications in refractories, electronic materials and many other fields. This article first introduces the evaluation index of α-Al₂O₃ in industrial application and α-Al₂O₃ phase transition mechanism. Then the article expounds related research progress of the α-Al₂O₃ preparation, from three aspects that solid phase synthesis, liquid phase synthesis and gas phase synthesis, respectively. The factors which affect the microstructure of α-Al₂O₃ particles during preparation are discussed, including calcination temperature, mineralizer, pH value and pretreatment conditions. Finally, the lack of research on the nucleation growth mechanism of α-Al₂O₃ is pointed out, and indicating that a specific nucleation mechanism, the mass production of high purity α-Al₂O₃ and morphology control technology will be the future research focus and development direction in this field.

Key words: α-Al₂O₃, transition mechanism, micromorphology, particle size, calcination temperature, mineralizer

CLC Number:

TQ133.1

WU Yufeng, ZHANG Tiejun, ZHANG Jiameng, BI Zuozhen, LEI Ming, BI Ke. Research Progress on Phase Transition Mechanism and Preparation Technology of α-Al₂O₃[J]. Journal of Synthetic Crystals, 2021, 50(1): 199-208.

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Research Progress on Phase Transition Mechanism and Preparation Technology of α-Al₂O₃

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