一什么是稀土? 有这样一些金屬,近些年来它們在鋼鉄冶金上、在特殊合金里的作用逐渐地重要起來,应用在军事工业上,应用在原子技术上,它们的应用范围越来越广泛了。虽然有某些领域目前对于它们的使用还是试探性质的,但它们的特种作用,使得对于它们的利用存在着很大的可能。这些金屬就是我们所要谈的稀土。所謂稀土是指稀土元素而言的;因为这些元素都是金属性质的,所以又叫做稀土金屬。稀土金屬一共有15个,就是从元素周期表上的第57号元素到第71 What are rare earths? There are such metals that, in recent years, have become increasingly important in the steel industry, in special alloys, in the military industry, in the field of atomic technology, and their applications have become more and more widespread It’s Although there are some areas where the use of them is tentative at this time, their special effects make it highly possible for their use. These metals are the rare earths we are talking about. The so-called rare earth rare earth elements in terms of; because these elements are metallic nature, it is also known as rare earth metals. A total of 15 rare earth metals, is from the 57th element of the periodic table to 71