New synthesis method of advanced lithium titanate with Li₄TiO₄ additives for ITER-TBM

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• 作者：Tsuyoshi Hoshino ; Kenichi Kato ; Yuri Natori ; Mutsumi Nakamura ; Kazuya Sasaki ; Kimio Hayashi ; Takayuki Terai ; Katsuyoshi Tatenuma
• 关键词：Advanced lithium titanate ; Tritium breeding material ; ITER ; Test blanket module ; Li₂TiO₃ ; Li₄TiO₄ ; Crystal structure
• 刊名：Fusion Engineering and Design
• 出版年：2009
• 出版时间：June 2009
• 年：2009
• 卷：84
• 期：2-6
• 页码：956-959
• 全文大小：747 K

文摘

Lithium titanate (Li₂TiO₃) is one of the most promising candidates among the proposed solid breeder materials for fusion reactors. Addition of H₂ to inert sweep gas has been proposed for enhancing the release of bred tritium from breeder material. However, the mass of Li₂TiO₃ has been found to decrease with time in the hydrogen atmosphere. This mass change indicates that the oxygen content of the sample decreased, suggesting the change from Ti⁴⁺ to Ti³⁺. Development of Li₂TiO₃ with Li₄TiO₄ additive is expected to be effective in control the mass change at the time of high temperature use. In the present paper, synthetic methods of advance lithium titanate (Li₂TiO₃ added with Li₄TiO₄) have been extensively investigated by solid state reaction. The crystal structure of the sample was analyzed by means of inductively coupled plasma atomic emission spectrometry (ICP-AES) and X-ray diffraction (XRD). The molar ratios Li₂O/TiO₂ of samples after the reaction were in good agreement with the values at the time of mixing LiOH·H₂O and H₂TiO₃.

The overall results suggest that the solid state reaction of LiOH·H₂O and H₂TiO₃ is one of the most appropriate synthesis methods for advanced lithium titanate with Li₄TiO₄ in prospect of mass production technology for the test blanket module (TBM) of International Thermonuclear Experimental Reactor (ITER).