Sol-gel method using carbon tetrachloride as drop-formation medium for producing large ThO2-base microspheres.
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概要
- 論文の詳細を見る
A method is described for producing large, spherical ThO<SUB>2</SUB> or (Th, U)O<SUB>2</SUB> particles by a sol-gel process. In the method CCl<SUB>4</SUB> is used as a sol-drop formation medium and ammonia as a gelling agent. Source sols used are lighter than CCl4. So, sol-drops are formed in pure CCl<SUB>4</SUB> at the bottom of a gelation column. Thereafter they ascend in ammoniac CCl<SUB>4</SUB> with solidification of their surface and reach interface between the ammoniac CCl<SUB>4</SUB> and concentrated NH<SUB>4</SUB>OH which is placed on the CCl<SUB>4</SUB> to complete gelation of the drops. For continuous recovery of the resulting gel-spheres from the interface, special devices are developed. By using this apparatus, large microspheres of ThO<SUB>2</SUB> and (Th, U)O<SUB>2</SUB> are obtained without crack-ing; maximum attainable diameters of sintered spheres are 1, 000 and 1, 300 μm, respectively. Their sphericities are less than 1.1 even for 1, 000 μm diameters.
- 一般社団法人 日本原子力学会の論文
著者
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Takahashi Yoshihisa
Department Of Chemistry And Fuel Research Japan Atomic Energy Research Institute
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Yamagishi Shigeru
Department Of Chemistry And Fuel Research Japan Atomic Energy Research Institute
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