微流控辅助内凝胶工艺制备单分散氧化铀微球  

Preparation of Monodisperse Uranium Oxide Microspheres by Using Microfluidic Assisted Internal Gelation Process

作　　者：徐瑞 马景陶[1] 邓长生[1] 郝少昌[1] 赵兴宇[1] 李建军[1] 李自强[1] 刘兵[1] 唐亚平[1] XU Rui;MA Jingtao;DENG Changsheng;HAO Shaochang;ZHAO Xingyu;LI Jianjun;LI Ziqiang;LIU Bing;TANG Yaping(State Key Laboratory of New Ceramics and Fine Processing,Institute of Nuclear Energy and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学核能新能源技术研究院新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《陶瓷学报》2023年第6期1217-1223,共7页Journal of Ceramics

基　　金：国家科技重大专项(2017ZX06901-025);国家自然科学基金(52073157);新型陶瓷与精细工艺国家重点实验室开放课题(KF202305)。

摘　　要：内凝胶工艺由于制备氧化铀微球球形度好而受到广泛关注。但是内凝胶工艺仍存在一些难点,如制备的微球尺寸略有不均,这不利于内凝胶工艺的大规模应用。在本项工作中特引入微流控辅助内凝胶工艺来制备单分散溶胶液滴。单分散溶胶液滴经洗涤、干燥和烧结后即可获得单分散的氧化铀微球。研究表明通过微流控辅助内凝胶工艺可以制备出尺寸变异系数≤1%、球形度1.01的单分散氧化铀微球。微流控辅助内凝胶工艺操作简便,在制备高质量核燃料微球方面具有广泛的应用前景。UO_(2) microspheres prepared by using the internal gelation process have attracted wide attention due to their good sphericity.However,the internal gelation process still has difficulties,such as the slightly uneven size of the prepared microspheres,which is not conducive to large-scale application.The microfluidic assisted internal gelation process was employed to prepare monodisperse sol droplets,which were solidified and sintered to obtain monodisperse uranium oxide microspheres.The uranium oxide microspheres have a uniform size distribution,with variation coefficient to be less than or equal to 1%and sphericity of 1.01.The microfluidic assisted internal gelation process is simple strategy to prepare high-quality nuclear fuel microspheres.

关 键 词：氧化铀微球 内凝胶工艺 微流控 单分散 球形度 

分 类 号：TQ174.75[化学工程—陶瓷工业]