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Li₄SiO₄ based breeder ceramics with Li₂TiO₃ and other strengthening phase additions

Kolb, M.H.H.; Mukai, K.; Knitter, R.; Hoshino, T.

Ceramic breeder pebbles, applied as pebble beds, are the major functional components of the solid breeder blankets developed for ITER and DEMO. The primary task of the breeder pebbles is the generation of tritium by neutron capture and transmutation of lithium. To achieve tritium self-sufficiency, these ceramic materials must carry high amounts of lithium. Yet, the pebbles must be able to withstand the conditions within the blanket during the anticipated time of use of several years. As the pebbles are going to endure significant mechanical forces during operation from differences in thermal expansion, it is important to increase the strength of the pebbles, while maintaining a suitable lithium density and low activation properties. Currently Li4Si04 and LizTi03 are considered as reference class breeder compounds. Lately the routine fabrication of two-phase pebbles consisting of Li4 Si04 and LizTi03 was established. The rigidity of such pebbles is significantly improved over reference grade Li4Si04 pebbles. However, the applied melt-based fabrication process is limited to a maximum LizTi03 content of 40 mol% as the processing tem ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Keramische Werkstoffe und Technologien (IAM-KWT)
Publikationstyp Vortrag
Jahr 2015
Sprache Englisch
Identifikator KITopen ID: 230102809
HGF-Programm 31.03.06; LK 01
Erschienen in 18th International Workshop of Ceramic Breeder Blanket Interactions (CBBI-18), Jeju, Korea, September 10-12, 2015
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