一前言稀土元素的冶金历史大致可分为三个时期。初始期,从发现元素(1789)开始,到开发应用离子交换法对稀土类17个元素彼此分离精炼技术的160年时间,可说是混合稀土及其金属(铈镧合金)的时代。随后为黎明期是50年代以后的20年时间,由于分离稀 A preface The history of rare earth metallurgy can be roughly divided into three periods. In the initial period, starting from the discovery of elements (1789), to the development and application of ion-exchange method for 17 elements of rare earths separation of refining technology for 160 years, can be said to be mixed rare earth and its metal (cerium lanthanum alloy) era. Subsequent to the dawn is 20 years after the 50s, due to the separation of dilute