Sol-Gel法制备大直径陶瓷UO<sub>2</sub>球的工艺研究

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Sol-Gel法制备大直径陶瓷UO₂球的工艺研究

1. Chemical Engineering Institute, Sichuan University, Chengdu, 610041, China;
2. National Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, Chengdu, 610041, China

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。
- Sol-Gel /
- 陶瓷 /
- UO₂ /
- 球形燃料
Abstract: Ceramic UO₂ 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 UO₂ 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.
- Sol-Gel /
- Ceramic /
- UO₂ /
- Spherical fuel