Abstract
Lithium titanate (Li 2TiO 3) is one of the most promising candidates among the proposed solid breeder materials for fusion reactors. Addition of H 2 to inert sweep gas has been proposed for enhancing the release of bred tritium from breeder material. However, the mass of Li 2TiO 3 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 Ti 4+ to Ti 3+. Development of Li 2TiO 3 with Li 4TiO 4 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 (Li 2TiO 3 added with Li 4TiO 4) 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 Li 2O/TiO 2 of samples after the reaction were in good agreement with the values at the time of mixing LiOH·H 2O and H 2TiO 3. The overall results suggest that the solid state reaction of LiOH·H 2O and H 2TiO 3 is one of the most appropriate synthesis methods for advanced lithium titanate with Li 4TiO 4 in prospect of mass production technology for the test blanket module (TBM) of International Thermonuclear Experimental Reactor (ITER).
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