论文部分内容阅读
稀土是化学元素周期表中的?系元素和钪、钇17种金属元素的统称。稀土并不是土,在自然界中的储存量也不少。稀土这个名称是从18世纪沿用下来的。那个时代,人们把一些不溶于水的金属氧化物统称为土族元素,而且可以提取这些金属氧化物的矿物又比较稀少,所获得的氧化物外观好象碱土一样,所以就把这些元素称为稀土。稀土应用科学是一个新的科学领域。据国内外研究资料报道,稀土元素具有优
Rare earth is a chemical element of the periodic table of elements and scandium, yttrium collectively referred to as 17 kinds of metal elements. Rare earth is not soil, in the nature of the storage is not less. The name of rare earth has been used since the 18th century. At that time, people referred to some water-insoluble metal oxides collectively as Tu elements, and the minerals that can be extracted from these metal oxides were relatively scarce, and the oxides obtained looked like alkaline earths. Therefore, these elements are called rare earths . Rare Earth Applied Science is a new field of science. According to domestic and foreign research reports, rare earth elements have excellent