Evaluation of effective thermal diffusivity of Li2TiO3 pebble bed under neutron irradiation

Kawamura, Hiroshi; Kikukawa, A.; Tsuchiya, Kazuyoshi; Yamada, H.; Nakamichi, Masaru; Ishitsuka, Etsuo; Enoeda, Mikio; Ito, Hiroto

doi:10.1016/s0920-3796(03)00351-x

Cited by 5 publications

(1 citation statement)

References 6 publications

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“…리튬을 포함 하고 있는 산화물 중 Li 2 TiO 3 는 낮은 활성화에너지, 뛰어 난 삼중수소 이동과 화학적 안정성을 보이기 때문에, 융 합 반응을 위한 고체 증식 물질로서 평가되고 있으며, [3][4][5] 이에 따라 Li 2 TiO 3 의 삼중수소 방출 거동이 연구되고 있 다. [6][7][8] 이러한 Li 2 TiO 3 증식재의 밀도, 입자 크기, 기공 형 상 및 크기와 같은 물리적 특성은 기계적 특성, 열전도도 및 삼중수소 회수 등에 크게 영향을 미친다. 이러한 물리 적 특성은 제조공정에 크게 의존하므로 적절한 공정의 선 택이 매우 중요하다.…”

Section: 서 론unclassified

Fabrication of Li₂TiO₃Pebbles by Lithium Solution Penetration Method

Yu¹,

Park²,

Lee³

2013

Journal of the Korean Ceramic Society

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To fabricate spherical lithium titanate (Li 2 TiO 3 ) pebbles which are used for a breeder material in fusion reactor, titanium oxide (TiO 2 ) granules were used as a starting material. The granules were pre-sintered, and then aqueous lithium nitrate solution infiltrated into the granules at vacuum condition. The granules were crystallized to Li 2 TiO 3 after sintering under the control of process parameters. In this study, the concentration of lithium in the solution, as well as the number of penetration times and sintering temperature affected the final crystallite phase and the microstructure of the pebbles. In particular, the sphericity and size of the pebbles were effectively controlled by a technical rolling process. The useful spherical Li 2 TiO 3 pebbles which have 10 ~20% porosity and 60 ~120 N compressive strength were obtained through the sintering at 1000 ~1100 o C in the multi-times infiltration process with 50 wt% solution. The physical properties of pebbles such as density, porosity and strength, can be controlled by a selection of TiO 2 powders and control of processing parameters. It can be thought that the lithium penetration method is a useful method for the fabrication of mass product of spherical Li 2 TiO 3 pebbles.

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