Sol-Gel法制备大直径陶瓷UO_2球的工艺研究  

Research of Preparation of Large Diameter Ceramic UO_2 Spherite by Sol-Gel

作　　者：孟庆阳[1,2] 唐向阳[2] 刘锦洪[2] 朱常桂[2] 

机构地区：[1]四川大学化工学院,成都610041 [2]中国核动力研究设计院核燃料材料国家级重点实验室,成都610041

出　　处：《核动力工程》2011年第4期1-5,共5页Nuclear Power Engineering

摘　　要：采用Sol-Gel法内胶凝工艺,以贫铀芯块为原材料,经过煅烧、溶解、配胶、胶凝、老化、洗涤、干煅、还原烧结、筛分优选制备直径为2~3 mm的陶瓷UO2球形燃料芯核。相关的物性及化学分析结果表明：所制备的燃料芯核内部结构致密均匀,密度为理论密度的97±2%;杂质含量低,氧铀比为2.00±0.01;平均直径为2.6 mm;球形度小于1.10,平均为1.06。Ceramic UO_2 spherites with diameter of 2-3mm are prepared from depleted uranium by Sol-Gel method.The whole process includes incineration,dissolution,mixing,gelatinization,aging,washing,dry incineration,reducing sintering,and optimization.The physical and chemical analysis results indicate that the inner structure of the UO_2 spherite is compact and homogeneous,which density is 97±2% T.D.;The content of impurity is low;The O/U is 2.00±0.01;The average diameter is 2.6 mm;The sphericity is less than 1.10,and the average sphericity is 1.06.

关 键 词：SOL-GEL 陶瓷 UO2 球形燃料 

分 类 号：TL352[核科学技术—核技术及应用]