摘要
通过将六水合硝酸铀酰(UNH)与尿素(urea)以1:4的摩尔比混合,得到了一种由二者形成的室温下为液态的共晶溶剂(1:4DES),并以之作为制备UO燃料微球的前驱体。含铀的共晶溶剂通过微流控系统分散成大小均一、尺寸可控的含铀微液滴球,之后使用氨水饱和的辛醇溶液作为固化介质,最终得到了固态的重铀酸铵(ADU)小球。实验过程中使用光学显微镜得到了固体微球的形貌特征,并借助拉曼光谱,分析了铀酰在不同阶段的化学状态,同时确定固体微球的成分为重铀酸铵。
By mixing uranyl nitrate hexahydrate and urea in a molar ratio of 1:4, a deep eutectic solvent(DES) formed by the two was obtained and used as a precursor for preparing UOfuel microspheres. The uranium-containing eutectic solvent was dispersed into microdroplets with uniform and controllable size through a microfluidic system. Afterwards, an octanol solution saturated with ammonia water was used as the curing medium, and finally solid ADU pellets were obtained. During the experiment, the morphology of the solid microspheres was obtained by optical microscope, and the chemical state of uranyl at different stages was analyzed by means of Raman spectroscopy, and the composition of the solid microspheres was determined to be ammonium diuranate.
作者
谭吉文
Tan Jiwen(China Institute of Atomic Energy,Beijing 102413,China)
出处
《科学技术创新》
2022年第27期35-38,共4页
Scientific and Technological Innovation
关键词
六水合硝酸铀酰
共晶溶剂
微流控系统
UO2燃料微球
拉曼光谱
重铀酸铵
uranyl nitrate hexahydrate
deep eutectic solvent
microfluidic system
UO2 fuel microspheres
raman spectroscopy
ammonium diuranate
