期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 99, 期 6, 页码 1911-1916出版社
WILEY-BLACKWELL
DOI: 10.1111/jace.14147
关键词
-
资金
- National Natural Science Foundation of China [51071079, 51272098, 51551201]
Nanocrystalline microstructure is regarded as a strategic approach to overcome the brittleness of alumina ceramics, and the preparation of disperse equiaxed alpha-Al2O3 nanoparticles is an essential step for the preparation of nanocrystalline alumina ceramics. In this work, disperse equiaxed alpha-Al2O3 nanoparticles were prepared using alpha-Fe2O3 as seed and isolation phase. At first, the composite of alpha-Al2O3 nanoparticles embedded in alpha-Fe2O3 matrix was obtained by calcining the precursor powder containing gamma-AlOOH and Fe(OH)(3) (Fe3+/Al3+ mole ratio of 5) at 770 degrees C for 2 h. Then disperse equiaxed alpha-ZAl(2)O(3) nanoparticles with a mean size of 12 nm and a size distribution from 2 to 40 nm without vermicular microstructure were obtained by removal of alpha-Fe2O3 and other impurities in the composite through acid corrosion.
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