共搜索到3048条信息，每页显示10条信息，共305页。用时：0小时0分0秒389毫秒
spectrometry(ICP-AES); lead concentrate; lead; impurity elements; [全文内容正在添加中] ......
含量降低到0.22%,Bi的纯度富集到99.78%.另外,Zn含量为1.02%~4.66%的铋熔体经过真空处理,Bi的纯度达到99.7%以上.铋熔体可通过真空方法有效除Zn,金属回收率高,并且对环境无污染,得到的Zn还可返回粗铋加锌提银工段再使用.关键词:真空蒸馏；脱锌；铋熔体Vacuum refining bismuth melts to remove zincXU Yan, QIU Ke...:The thermodynamics of vacuum refining bismuth melts to remove zinc was analyzed and calculated. The effects of temperature, refining time and vacuum degree on vacuum separation efficiency of zinc were also......
. The experimental results show that inorganic impurity contents in EMD decrease remarkably after acid treating; presintering EMD can remove adsorbent water and organic impurity, enlarge pore space...+ decreases the Mn3+ content. So, the lattice shrinks and the parameters decrease. Reversely, the decrease of Na+ content in A-EMD-LMO increases the lattice parameters. No impurity phase of Cr is found......
......
. 关键词:Fe-50%Ni软磁合金；杂质；显微结构；磁性能 中图分类号:TF124.39 文献标志码:A Effects of microstructure and impurity on magnetic properties of metal injection molding Fe-50%Ni alloy XIONG Liang, LI... injection molding (MIM) technique using carbonyl iron powder and carbonyl nickel powder as raw materials. The effects of microstructure and impurity levels on the magnetic properties of MIM Fe-50%Ni soft......
September 2007 Abstract: The removal of impurity phosphorus from metallurgical grade silicon is one of the major problems on purification of metallurgical grade silicon for solar grade silicon preparation. The thermodynamics on vacuum refining process of the metallurgical grade silicon was studied via separation coefficient of impurity phosphorus in the metallurgical grade silicon and vapor-liquid......
Density functional theory study of influence of impurity on electronic properties and reactivity of pyrite LI Yu-qiong1, CHEN Jian-hua2, 3, CHEN Ye2, GUO Jin3 1. School of Chemistry and Chemical... using density functional theory (DFT), and the reactivities of pyrite with oxygen and xanthate were discussed by frontier orbital methods. The cell volume expands due to the presence of impurity. Co......
; steel; grain boundary; impurity; [全文内容正在添加中] ......
laboratory,USA.This work proves that Gd-Si-Ge alloys made of domestic Gd can be utilized in magnetic refrigerators. Key words:metal materials; giant magnetocaloric effect; Gd-Si-Ge alloys; Gd; impurity; rare......
concentration sensitivity. Therefore, a special attention must be paid to this problem in the practical application of Al-Li based alloys. Key words:rare earths; cerium; impurity; Al-Li based alloy; stress......
