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-variable rare earth elements and semiconductor oxide,were fabricated.Free radicals produced by the materials were tested.The result shows that the materials can produce quite a few free radicals as·O-2... and redox process of valency-variable rare earth elements free radicals translate into negative ions. A circular model is presented involving circulating change of valency-variable rare earth elements......
of protective oxidation film on the thermodynamics is attributed to RE elements congregating on the surface of molten Mg alloy. Key words: rare earth (RE); magnesium alloy; oxidation film; ignition..., Be is poisonous, and excessive Be can also damage mechanical properties. Therefore, the applications of alloying with Be or Ca have been greatly limited [4-8]. Rare earth elements have special......
Effect of Rare Earth Elements on Isothermal Transformation and Microstructures in 20Mn Steel刘和,郑登慧,T.Y.Hsu徐祖耀摘 要:<正> The effect of rare earth... ferrite and the rate of pearlitic transformation.In addition,rare earth elements play a role ofreducing needle-like ferrite and the amount of pearlite,densifing the lamellar space of pearlite......
. In the last decade, several researchers focused on the rare earth elements. They have demonstrated that the treatments with aqueous solutions of rare earth salts, especially cerium salts... and the thinner rare earth film joining zinc substrate remained. Fig.4(a) shows the AES spectrum of the rare earth film treated for 5 min. The AES depth profile of major elements in the rare earth film......
Influence of Rare Earth Elements on Microstructure and Mechanical Properties of Mg-Li Alloys Liu Bin1,Niu Zhongyi1,Wang Tao1,Zhang Milin1 (1.College of Materials Science and Chemical Engineering... of the laminar spacing and causes refinement of the microstructure. Therefore, this compound improves the strength of alloys at a high temperature. Key words:Mg-Li alloys; high temperature properties; rare......
Preliminary Study on Enrichment Law of Associated Rare Earth Elements in High-Sulfur Bauxite from Guizhou刘志红,岳紫龙,张覃,卯松,成奖国,聂光华,牛芳银摘 要:The Inductively Coupled Plasma-mass Spectrometer (ICP-MS) was used for measuring the content of rare earth elements in Guizhou high-sulfur and high-silicon bauxite ore and products of mineral processing. The results show......
Extraction and back-extraction behaviors of 14 rare earth elements from sulfuric acid medium by TODGAHuiting Yuan1,Weixiang Hong1,Yushan Zhou1,Baisong Pu1,Aijun Gong1,Qishan Yang3,Fukai Li1,Lina... of Science and Technology摘 要:The unique physical and chemical properties of rare earth elements lay the foundation for their extensive application. N,N,N’,N......
Extraction and back-extraction behaviors of 14 rare earth elements from sulfuric acid medium by TODGAHuiting Yuan1,Weixiang Hong1,Yushan Zhou1,Baisong Pu1,Aijun Gong1,Qishan Yang3,Fukai Li1,Lina... of Science and Technology摘 要:The unique physical and chemical properties of rare earth elements lay the foundation for their extensive application. N,N,N’,N......
Geochemistry of Rare Earth Elements in Lamprophyres in Laowangzhai Gold Orefield, Yunnan Province XU Cheng1,HUANG Zhi-long1,XIAO Hua-yun1,LIU Cong-qiang1 (1.Laboratory of Ore Deposit Geochemistry... that the altering fluids and mineralizing fluids contain REE, and these fluids are mainly the products of mantle degassing and magma degassing during the lamprophyric magmatism. Key words:rare earths......
), suggesting that RE elements can be divided into two groups with Gd as border. This phenomenon is called Gadolinium-broken effect. Key words: weathered crust; ore; rare earth partition; correlation analysis1.... Geochemistry of Rare Earth Elements [M]. Beijing: Science Press, 1990. 1-495. (in Chinese) [2] WU C Y, HUANG D H, GUO Z X. Geochemistry of REE from granite weathering crusts in Longnan of Jiangxi......
