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Preparation of Superfine Aluminum Hydroxide Fine Powder by Spontaneous Nucleation

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Abstract:

Superfine aluminum hydroxide fine powder with sheet-like particle in the range of dozens of nanometers to a few micrometers were prepared in high yields(90%) by spontaneous nucleation which is decompose under 45°C after cooling and diluting the solution of NaAlO2 abruptly without seeding .The influence of the concentration of NaOH when decomposing on the distribution of particle size were investigated .The vacuum freezing drying oven with vacuum(11pa) and freezing(-45°C) were used .The study showed that the optimum is under the concentration of 2.69 mol/kg.Moreover,the powders dried by the vacuum freezing drying oven has no agglomerative phenomenon and the particle size are much smaller then other ovens.

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Periodical:

Advanced Materials Research (Volumes 634-638)

Pages:

2246-2249

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.634-638.2246

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Online since:

January 2013

Authors:

Xing Yong Liu, Ting Ting Tang, Cheng Qian, Shi Xiong Hao

Keywords:

Aluminum Hydroxide, Fine Powder, Spontaneous Nucleation

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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