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《China Powder Science and Technology》 2006-04
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Preparation ofα-Al_2O_3 Ultrafine Powder by Pyrolytic Process

FENG La-jun CAO Kai-bo LEI A-li (School of Material Science and Engineering,Xi'an University of Technology,Xi' an 710048,China)  
For exploring a simple process of preparation ofα-Al_2O_3 ul- trafine powder,aluminum nitrate and aluminum hydroxide sol reacted from aluminum nitrate and ammonia water were individually heated and analyzed,whose products were all aggregate with sizes of 0.1~10μm observed by SEM and allα-Al_2O_3 determined by XRD with average grain sizes of 45 nm and 35 nm calculated by Sherrer formu- la.Comparing the above two methods,it was known that some advan- tages,such as low cost,high productivity and simple and easy con- trolled process,were belonged to the preparation ofα-Al_2O_3 ultrafine powder by directly heating and decomposing aluminum nitrate.
【CateGory Index】: TB383.3
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