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- 저자 : Xiujian Zhao (검색결과 2 건)
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Vitrification of Dry Wastes From Nuclear Power Plants in China
Guang Fang,Xiujian Zhao,Kai Xu 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1
With the rapid growth of nuclear power in China, a large number of dry wastes, which mainly include the high efficiency particulate air filters (glass fiber), cotton, polyethylene, and absorbent paper with low-level radioactivity and high volume, will be produced during the operation and maintenance of the nuclear power plants. Thermal plasma treatment is a world acceptable technology to incinerate and immobilize radioactive wastes, owing to the high volume reduction factor and the excellent chemical durability of the vitrified waste form. China has developed thermal plasma technology for the treatment of dry wastes from nuclear power plants for more than 15 years and the pilot plant has been constructed. This work will concentrate on the formulation of waste glass fiber to adapt to the vitrification process. A three-component (glass fiber-CaO-Na2O) constrained-region mixture experiment was designed and their viscosity data was mainly studied. The quadratic Scheff? model was used to plot the component effect on melting temperature. The retentions of simulated nuclides, such as Co, Sr, and Cs in the glasses were analyzed. In addition, the glass fiber as a glass matrix to immobilize residual ashes from the thermal plasma gasification of cotton, polyethylene, and absorbent paper was investigated as well.
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Fabrication of TiO<sub>2</sub> Microrod with Desired Shapes from Rod-like Titanium Glycolate
Han, Jianjun,Zhang, Hua,Li, Yuanzhi,Zhao, Xiujian,Chen, Hong,Wu, Zhongkui,Kim, Sun-Jae,Park, Kyeong Soon Chemical Society of Japan 2007 Chemistry letters Vol.36 No.11
<P>Rod-like titanium glycolate was prepared by poly-condensation of TiCl<SUB>4</SUB>, ethylene glycol, and water. Focusing electronic beam on one side of a titanium glycolate microrod led to bending of the micro-rod at the irradiation part. Calcination of the polymer results in formation of rod-like titania. By controlling irradiation time and changing focus position of electronic beam, we realized controllable processing of titania microrod with desired shapes, which may be find application in nano or microdevices.</P>
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