一、前言稀土元素目前在反应堆工程方面可用于控制材料、可燃毒物、屏蔽材料、结构材料和减速材料。在稀土元素中销、镝、钐、钆是动力反应堆最感兴趣的控制材料。一般采用稀土氧化物弥散的金属陶瓷或氧化物陶瓷。国外曾对氧化铕在不锈钢中的弥散体进行了相当深 I. INTRODUCTION REE can be used to control materials, combustible poisons, shielding materials, structural materials and deceleration materials in reactor engineering. In rare earth elements, dysprosium, samarium, gadolinium are the most interesting control materials for power reactors. General use of rare earth oxide dispersed cermet or oxide ceramic. Foreign countries had on the oxidation of europium in stainless steel dispersion was quite deep