配制尿素与Y³⁺浓度比为30的混合溶液，电磁搅拌均匀后，缓慢加入3 g⸱L^-1 的十六烷基三甲基溴化铵(Cetyl Trimethyl Ammonium Bromide; CTAB)，搅拌溶解均匀后，放入90 ℃水浴锅中，以恒定温度进行反应一定时间(1 h~2 h)，冷却至室温后，超声分散后离心分离，用去离子水和无水乙醇洗涤后得到碳酸钇Y₂(CO₃)₃前驱体沉淀，真空干燥后，放入真空管式高温炉中800 ℃煅烧4 h，即可得到球形氧化钇。采用RigakuD/maxx射线衍射仪(XRD)进行成分分析。XRD试验电压为40 KV，步长为8°/min，测试范围为10-90°。用SIRION200场发射扫描电子显微镜(FESEM)观察了其显微结构和粒径。

Prepare a mixed solution of urea and Y³⁺ concentration ratio of 30, stir well with electromagnetic, slowly add 3 g⸱L^-1 of Cetyl Trimethyl Ammonium Bromide (CTAB), stir and dissolve well, put it into a 90 ℃ water bath, and carry out the reaction at a constant temperature for a certain time ( After cooling to room temperature, the precursor precipitate of yttrium carbonate Y₂(CO₃)₃ was obtained by centrifugation after ultrasonic dispersion and washing with deionized water and anhydrous ethanol, and then dried under vacuum and calcined in a vacuum tube furnace at 800 ℃ for 4 h to obtain spherical yttrium oxide. The composition was analyzed by RigakuD/maxx-ray diffractometer (XRD) with an XRD test voltage of 40 KV, step size of 8°/min and a test range of 10-90°. The microstructure and particle size were observed with a SIRION 200 field emission scanning electron microscope (FESEM).