Preparation of Li2TiO3 by hydrothermal synthesis and its structure evolution under high energy Ar+ irradiation |
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| Affiliation: | 1. State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Faculty of Science, Shizuoka University, Shizuoka 422-8529, Japan;1. State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Faculty of Science, Shizuoka University, Shizuoka 422-8529, Japan;1. College of Physical Science and Technology, Sichuan University, Chengdu 610064, China;2. Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Sichuan University, Chengdu 610064, China;3. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China;4. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China |
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| Abstract: | Ultrafine lithium titanate (Li2TiO3) powder was synthesized by hydrothermal method. The phase formation and transition condition among α, β, and γ-Li2TiO3 were discussed. XRD and ICP-AES showed the single α-phase was formed at 180 °C with 2 h hydrothermal reaction, and it transited into β-phase at 400 °C. SEM observation and EDS analysis confirmed the dissolution of TiO2 and the formation of α-Li2TiO3 proceeded simultaneously with preferable growth direction of (-133) lattice. During the phase transition, the powder maintained the small crystallite, which facilitated the fabrication of Li2TiO3 bulk with small grain size. After the Ar+ irradiation, the surface region to the depth of 3 μm of Li2TiO3 ceramic was affected, where the decrease of crystallization and disturbance of short-range order were confirmed by GIXRD and Raman spectroscopy. In spite of the structure change at the surface area, the ceramic bulk maintained the same. |
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| Keywords: | Lithium titanate Hydrothermal Phase transition Solid tritium breeder Irradiation |
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