核融合炉ブランケット材としての多孔質Li_2SnO_3の合成とトリチウム放出挙動

概要

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As a candidate for solid blanket material of fusion reactor, porous particles of lithium stannate Li_2SnO_3 was prepared by the decomposition of lithium hexahydroxystannate Li_2Sn(OH)_6 at a relatively low temperature of 600℃. Sintering of these porous particles at 1000℃ resulted in blocks with bulk densities as low as about 50% theoretical. Densification of the block was found to be accelerated by either grinding of the starting powder or addition of Li_20. The present process has advantages of low temperature synthesis of lithium compounds, and small size and high porosity of primary particles. Release of tritium generated by neutron irradiation and stored in the block occurred up to 600℃, much lower temperature than with Li_20. This result is reasonably explained as due to the small size of primary particles of Li_2SnO_3 and also due to the high porosity of the sintered block.
社団法人日本セラミックス協会の論文
1990-05-01