| 摘要 |
<p>A ceramic nuclear fuel composition consisting of a hypostoichiometric dioxide of a metal such as uranium and thorium or mixtures thereof with an oxygen to metal ratio of 1.90-1.998 and containing minor quantities, 0.1-1 atom per cent, of an oxide of a metal such as yttrium, lanthanum and niobium, and optionally containing minor amounts of plutonium dioxide, is prepared by forming an intimate mixture of a hyperstoichiometric dioxide of uranium and/or thorium with 0.1-1 atom per cent of an oxide of yttrium, lanthanum or niobium, sintering the mixture, and then reducing the dioxide at a temperature of 1700-2000 DEG C. to the hypostoichiometric state.</p> |
