Preparation Conditions and Gelation Behaviors of ThO2-UO3 Sols for (Th, U)O2 Microsphere Fabrication

Shigeru YAMAGISHI; Yoshihisa TAKAHASHI

doi:10.3327/jnst.25.848

Preparation Conditions and Gelation Behaviors of ThO₂-UO₃ Sols for (Th, U)O₂ Microsphere Fabrication

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Keywords: ammonia, chemical preparation, colloid fraction, colloid particle size, cracking, gelation, microsphere, sol-gel process, sols, sphericity, thorium oxides, uranium oxides

JOURNAL FREE ACCESS

1988 Volume 25 Issue 11 Pages 848-856

DOI https://doi.org/10.3327/jnst.25.848

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Abstract

The conditions for preparing ThO₂-UO₃ sol by using the gaseous ammonia addition method are studied. Dependences of colloid particle size and colloid fraction of sol on U content, (Th+U) concentration and ammonia addition mode are observed, and the conditions for preparing sols suitable for gelation in CCI₄-ammonia media are found in the range of 1.01.3 mol (Th+U)/l and U content of 030%. Using the resultant sols, the effect of sol concentration on gelation behaviors such as sphericity and cracking is clarified.

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