The properties, applications, status of research at home and abroad and preparation method of nanometer alumina were introduced in this paper. The theoretical basis for preparation of nano-alumina by liquid-phase precipitation reaction was discussed, especially with emphasison on theoretical analysis of agglomeration preventing, mechanism in preparing nanometer particles . Adopting two methods (homogeneous precipitation method and precursor pyrogenation method), nano-Al2O3 powder was prepared in the present paper.In the process of preparing nano-Al2O3 powder by homogeneous precipitation method, using AlCl3 as raw material, (CH2)6N4 as precipitator, process parameters including concentration of reactants, proportion of reactants, reaction temperature, reaction time and dispersant were examined. It was indicated that steady and transparent gel can be produced by using AlCl3 as raw material under the condition of reactants concentration of...
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