[2N08-14] Fuel Production and Fuel Cycle

[2N10] Water vapor release behavior and mass loss of Li₄TiO₄-Li₂TiO₃ core-shell breeding ceramic pebbles with enhanced stability

*Ruichong Chen¹, Kazunari Katayama², Akito Ipponsugi², Ran Oyama², Takahiro Matano², Taku Matsumoto² (1. Sichuan Univ., 2. Kyushu Univ.)

Keywords:Tritium breeding ceramic, Li4TiO4-Li2TiO3, water vapor, mass loss

Li₄TiO₄-Li₂TiO₃ core-shell pebble with enhanced CO₂ barrier properties and mechanical properties was prepared by a granulation method with PVP assistance. The water vapor release behavior of this core-shell pebble compared with pure phase Li₄TiO₄ pebble was studied. The results show that Li₄TiO₄ has a strong ability to generate water in H₂/Ar, indicating that it has a high surface oxygen activation site concentration. The mass loss of this core-shell pebble at 900 ℃ for 30 days was estimated to be 4.8% of initial sample weight.