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TEM observation of growth and phase transformation in nanometer-sized titanium oxide powder
Cited 16 time in
Web of Science
Cited 16 time in Scopus
- Authors
- Issue Date
- 2011-03
- Publisher
- Kluwer Academic Publishers
- Citation
- Journal of Materials Science, Vol.46 No.6, pp.1780-1788
- Abstract
- The growth and phase transformation in the nanocrystalline titania powders were studied using TEM and X-ray diffraction. Titania particles consisting of anatase phase grow through coalescence. After a nucleus of rutile is formed, it grows at the expense of the nearest anatase particles. A nucleus of rutile is formed in two ways. The nucleation of rutile occurs at the amorphous interface between the small anatase particles. In a large anatase particle, the martensitic transformation is dominant. It is estimated that these two kinds of phase transformation mechanisms are controlled by the intrinsic and extrinsic defects. A rutile particle has the low-energy surfaces with a lot of terraces. The growth direction of a rutile particle is related to the orientation of twin. A rutile particle grows along a < 1 (2) over bar1 > direction on the {101}- twin plane.
- ISSN
- 0022-2461
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