The meaning of RARE EARTH ELEMENT is any of a series of metallic elements of which the oxides are classed as rare earths and which include the elements of the lanthanide series and sometimes yttrium and scandium —called also rare earth metal.
Share on Facebook rare earth (redirected fromRare earth elements) Thesaurus Medical Encyclopedia rare earth n. 1.Any of various oxides of the rare-earth elements. 2.A rare-earth element. [rare(because the minerals from which the rare-earth elements were first isolated are uncommon) +earth,met...
whether conditions for miningrare earth elementsaremore favourable on land or on the seabed, either [...] daccess-ods.un.org daccess-ods.un.org 这份研究报告受限于目前可用的数据以及与未来技 术、经济和管理制度有关的其它不确定因素,因而将无法明确断定开采稀土元素的条件在陆地更有利,还是在专属经济...
Y. Watanabe, in Handbook on the Physics and Chemistry of Rare Earths, 2016 1.1 Rare Earth Elements Rare earth elements (REEs) represent the group of 17 elements comprising 15 lanthanides, plus yttrium (Y) and scandium (Sc) (Table 1). Among the REEs, yttrium was discovered first in 1794 ...
Rare earths include a list of 17 chemical elements that, over the past decades, have become increasingly sought-after due to their use in many advanced technologies. The end uses of rare earths include the production of magnets, batteries, catalysts, displays, and more. Many industries are high...
Rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 (scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body of the periodic table (cerium [Ce] throug
The fourteen complexes of mandelic acid withrare earth elementsin aqueous solution have been prepared. 在水溶液体系中,用苯羟乙酸直接与碳酸稀土作用,合成了十四种苯羟乙酸稀土配合物. 互联网 The extensive application ofrare earth elementson agriculture has caused remarkable economic benefits. ...
Haskin, LA On rare-earth element behavior in igneous rocks. In: Ahrens, LH eds. (1979) Origin and distribution of the elements, Phys. Chem. Earth, Oxford, pp. 175-189Haskin LA (1979) On rare-earth element behavior in igneous rocks. In: Ahrens LH (ed) Physics and chemistry of the ...
Hedrick INTRODUCTION The rare earth elements (REEs), which include the 15 lanthanide elements (Z = 57 through 71) and yttrium (Z = 39), are so called because most of them were originally isolated in the 18th and 19th centuries as oxides from rare minerals. Because of their reactivity, ...
The effects of rare earth elements on the microstructure and properties of magnesium alloy AZ91D alloy were studied. The different proportion of rare earth elements was added to the AZ91D and the tensile tests were carried out at different temperatures. The experimental results show that at room ...