Abstract
Lithium oxide (Li2O) is one of the best tritium breeding materials. A new wet process, freeze drying method, was used to prepare Li2O pebbles by Li2CO3 powder. Preliminary fabrication tests including freezing, calcination and decomposition were carried out to investigate the fabrication technique parameter of Li2O pebbles. It is suggested that Li2O pebbles can be fabricated by the decomposition of Li2CO3 pebbles at 720 ℃, which were prepared by freeze drying method and calcinated at 650 ℃. Li2O pebbles sintered at 900 ℃ have a diameter of 0.8 mm, grain size of 9 m, density of 69.5% theoretical density and porous structure.
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