Technology of Preparing Alumina Nanoparticles by Precipitation Method

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Abstract Aluminium hydroxide,the precursor of alumina,was synthesized by precipitation reaction of the aluminium nitrate and sal volatile.The influence factors,such as pH values of solution,concentration of reactive solution and content of dispersant,on the size of alumina nanoparticles were investigated.The characteristic of powders was performed by TG-DSC,BET,TEM and laser particle analysis instrument.The results showed that when the react condition was temperature of 45 ��,pH 5,content of dispersant of 1.0% and aluminium nitrate concentration of 0.1 mol/L,the product could be transformed to 5��10 nm powders by calcining at 800 �� and 40 nm ��-Al_2O_3 at(1 210 ��) for 1.0 h.

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Received 2006-11-15; published 2006-11-15

Cite this article:

HAN Bing,LI Zhi-hong.Technology of Preparing Alumina Nanoparticles by Precipitation Method[J] Chemcial Industry and Engineering, 2006,V23(6): 512-515

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