In-situ TEM Study on Microstructural Evolution of Nanostructured TiO_2

• 作 者: 邵艳群 唐电
• 机 构: State Key Laboratory of Die&Mould Technology Huazhong University of Science and Technology,Institute
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2007年02期
• 关键词: rutile anatase powders SAED amorphous sizes transformed irradiated structured cr

The effect of electron beam on the microstructures and phase transformation of nano-structured TiO 2 heat treated at various temperatures for different time was studied by in-situ TEM and SAED. Anatase ex-situ heated at 250℃and 360℃transformed to rutile while irradiated by the electron beam. With the increasing sizes and distribution of the powders on the amorphous carbon,the process of phase transformation by the electron beam was encumbered.These evolutions may be due to the changes of vacuum atmosphere and the properties of powders.

The effect of electron beam on the microstructures and phase transformation of nano-structured TiO 2 heat treated at various temperatures for different time was studied by in-situ TEM and SAED. Anatase ex-situ heated at 250 ℃ and 360 ℃ transformed to rutile while irradiated by the electron beam. With the increasing sizes and distribution of the powders on the amorphous carbon, the process of phase transformation by the electron beam was encumbered. The evolution may be due to the changes of vacuum atmosphere and the properties of powders.