Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1652655 | Materials Letters | 2007 | 4 Pages |
Abstract
The rod-like hexaaluminate nanoparticles have been prepared by using the alumina sol as the (NH4)2CO3 co-precipitation precursor and supercritical drying (SCD) method. Formation of the final hexaaluminate likely occurs via diffusion of the Ba2+ ions into the δ-Al2O3 matrix. Only Ba-hexaaluminate phase (alumina-rich phase) is observed in the hexaaluminate products. Since the network of the aerogel has a higher stability than that formed by using aluminum nitrate, leading to the decrease in the mobility of aluminum at high calcination temperature, which plays a significant role in maintaining high surface area and pore structure.
Related Topics
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Authors
Shunqing Li, Haitao Liu, Xinhong Zhao, Xiaolai Wang,