Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)
- 2006.09a
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- Pages.466-467
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- 2006
HRTEM Study of Phase Transformation from Anatase to Rutile in Nanocrystalline $TiO_2$ Particles
- Kim, Kyou-Hyun (Division of Materials Science and Engineering, Korea University) ;
- Park, Hoon (Division of Materials Science and Engineering, Korea University) ;
-
Ahn, Jae-Pyoung
(Advanced Analysis Center, Korea Institute of Science and Technology)
;
- Lee, Jae-Chul (Division of Materials Science and Engineering, Korea University) ;
- Park, Jong-Ku (Nano-Materials Research Center, Korea Institute of Science and Technology)
- Published : 2006.09.24
Abstract
The anatase particle was facetted at the free surface and a neck formation between the anatase particles prior to the phase transformation occured. This resulted in the severe lattice distortion at the region of the interface near the neck and this can act as the nucleation sites for the phase transformation. The grain growth of rutile particles after the phase transformation grew very fast by the sweeping phenomena of grain boundary. Therfore, It leaded to the microstructure without the rutile phase located in anatase particle.