Preparation of Flake Alumina Using Aluminum-Air Battery  Waste Electrolyte as Raw Material

Abstract

Abstract: In this paper, the flaky alumina (α-Al₂O₃) powder was prepared with using aluminum-air battery waste electrolyte as raw material, adjusting pH value with aluminum sulfate, and using potassium sulfate as molten salt. And the effects of synthesis temperature and crystal seed amount on the volume fraction, particle size, and particle size distribution of α-Al₂O₃ powder were studied. The structure and morphology of α-Al₂O₃ powder with different amounts of crystal seed were characterized by X-ray diffractometer, scanning electron microscopy, and laser particle size analyzer. The research results show that the volume fraction of α-Al₂O₃ powder increases, the particle size is reduced, the particle size distribution is more concentrated and the dispersity is better after adding crystal seed. In addition, when the crystal seed amount is 5%(mass fraction), the volume fraction of prepared flaky α-Al₂O₃ can reach 97.0%, and the average particle size is about 7.24 μm.

Key words: flaky alumina, aluminum-air battery waste electrolyte, crystal seed, particle size, molten salt method, dispersity

CLC Number:

X703
TQ133.1

WANG Lijun, WU Xingrong, WANG Yanru, SHEN Xingmei, CAO Fabin. Preparation of Flake Alumina Using Aluminum-Air Battery Waste Electrolyte as Raw Material[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(4): 1490-1498.

References

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Preparation of Flake Alumina Using Aluminum-Air Battery Waste Electrolyte as Raw Material

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