Studies on the Preparation of Aluminium Oxide (Hydrous)Ultrafine Particles by the Method of Microemulsion Reaction

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (1): 13.

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Studies on the Preparation of Aluminium Oxide (Hydrous)Ultrafine Particles by the Method of Microemulsion Reaction

CHEN Long-Wu¹, GAN Li-Hua¹, YUE Tian-Yi¹, ZHOU En-Xuan²

1. Department of Chemistry, Tongji University, Shanghai, 200092;
2. The Ninth Department, Beijing University of Aeronauties, Beijing

Received:1994-01-31 Revised:1994-05-28 Online:1995-01-24 Published:1995-01-24

Abstract

Abstract: The phase composition and properties of microemulsion system of water, Triton X-100,n-hexanol and cyclohexane, were studied.It shows that when n-hexanol and Triton X-100 is in the weight ratio of 2:3, this microemulsion system has extensive and stable microemulsion phase regions, and therefore is an ideal reaction system for the preparation of ultrafine particles. In the water-in-oil microemulsion system of Triton X-100,n-hexanol, cyclohexane and aluminium hydroxide sol, aluminum hydrous oxide(α-AlOOH) ultrafine particles were prepared by the method of precipitation with NH₃ being used. According to transmission electron micrographs the mean diameter of particles is about 6 nm. The uniformity of particles is better. The particles size did not change when α-AlOOHultrafine particles were converted to γ-Al₂O₃ by heating. The special surface area of the ultrafine γ-Al₂O₃ powder sample is 159.2 m²·g^-1.

Key words: Ultrafine particle, α-AlOOH, Aluminum hydrous oxide, γ-Al₂O₃, Microemulsion

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CHEN Long-Wu, GAN Li-Hua, YUE Tian-Yi, ZHOU En-Xuan. Studies on the Preparation of Aluminium Oxide (Hydrous)Ultrafine Particles by the Method of Microemulsion Reaction[J]. Chem. J. Chinese Universities, 1995, 16(1): 13.

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Studies on the Preparation of Aluminium Oxide (Hydrous)Ultrafine Particles by the Method of Microemulsion Reaction

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