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分铅源,即上地壳也是成矿物质的来源之一.大福楼锡多金属矿床成矿作用与造山构造事件有关,矿床主要形成于造山带构造环境中.关键词:Pb同位素;成矿物质来源;矿床成因;大福楼锡矿;广西Lead isotope geochemistry of Dafulou tin-polymetallic deposit, GuangxiCHENG Yong-sheng1, 2, HU Rui-zhong2(1...广西大福楼锡多金属矿床铅同位素地球化学成永生1, 2,胡瑞忠2(1. 中南大学 地球科学与信息物理学院,有色金属成矿预测教育部重点实验室,湖南 长沙,410083; 2. 中国科学院 地球化学研究所 矿床地球化学国家重点实验室,贵州 贵阳,550002)摘 要:为了探讨广西南丹大厂矿田大福楼锡多金属矿床的成矿物质来源及其源区特征,对矿石的铅同位素组成特征及其成矿构造环境进行分析与研究.研究结果......
文章编号:1004-0609(2011)02-0450-09 复杂体系中锌铅氯化物饱和蒸气压的测试 张延玲,付中华,李士琦,王玉刚,符显斌 (北京科技大学 冶金与生态工程学院 生态与循环冶金教育部重点实验室,北京 100083) 摘 要:为了更好地控制Zn,Pb等重金属在熔融处理过程中的挥发行为,需要确切了解复杂体系中Zn,Pb等重金属化合物的饱和蒸气压和活度等重要的热力学参...需要事先明确气体挥发种类,而且为了保证测试数据的准确性,样品质量损失Δm应该完全由摩尔质量为m的气体种类挥发产生.因此,为了使试验与分析更为简化,本研究在试验前首先利用热力学计算确定了Zn,Pb单独存在于CaO-SiO2-FeO/Fe2O3-Al2O3体系中时只有一种(或尽可能少的)挥发气体大量形成的温度条件.已有研究[13, 17]表明,锌的主要挥发气体种类为单质Zn和ZnCl2,铅的挥发气体种......
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(RTILs) are considered alternative electrolytes in laboratory studies during metal electrodeposition [3-5]. KATAYAMA et al [6] electrochemically extracted lead from Pb(TFSA)2 in a BMPTFSA system at 298..., PbO2, and PbO exhibits the analogous thermodynamic behavior [J]. Electrochimica Acta, 2016, 214: 265-275. [20] YEH H W, TANG Y H, CHEN P Y. Electrochemical study and extraction of Pb metal from Pb......
for about 24 h before electrolysis to remove residual water. Pre-electrolysis was conducted at -2.00 V (vs Ag/Ag+) for 4 h to remove the metal ion impurities in the melts. Solutions of Pb(II) and Mg(II... to a lowering activity of the deposited metal in other foreign substrate. The foreign substrate is probably Mg-Pb alloys pre-deposited on the molybdenum electrode. Peaks of a-a′ and b-b′ disappear......
), and roasting time (c) on metal leaching efficiency, and relationship between Fe3+ concentration and pH (d) Figure 3 XRD patterns of residue: Figure 4 SEM images of Pb-Ag residue before (a) and after (b... was to evaluate the ability of a procedure that entails the use of sulfation roasting, water leaching, and chlorination leaching (blowing oxygen technique) to recover Pb and Ag, followed by cooling crystallization......
-Schottky曲线测试时, 选用阳极1.28V成膜, 选择1.28V是由于该电位接近于电池深充放电后正极板栅所处的电位, 同时该电位又是导电性差的二价铅化合物的生成电位, 因此研究此电位下膜的半导体性能对改善膜的导电性十分必要. 图1 铅电极4.5mol/L硫酸溶液中的循环伏安行为 Fig.1 Cyclic voltammetry of Pb electrode...线的斜率逐渐减小, 相应地, 膜中的施主密度也随极化时间的延长而增加(见图3). 这主要是由于1.28V下铅电极表面首先形成一层半透性的PbSO4膜, 它只允许H+和OH-透过, 而Pb2+和SO2-4不能透过此膜, 达稳态后, PbSO4膜不再生长. 随着氧化时间的延长, PbSO4膜下逐渐生成Pb(Ⅱ)化合物, 随着时间的继续延长, Pb(Ⅱ)化合物的数量继续增加, 此时膜内既有PbO......
Additional transition induced by magnetoelectric interaction in ferroelectromagnet Pb(Fe1/2Nb1/2)O3 YANG Ying(杨 颖)1, HUANG Hong-bo(黄红波)2, SHEN Hong-lie(沈鸿烈)1, LIU Jun-ming(刘俊明)2, ... experimentally in Pb(Fe1/2Nb1/2)O3 and the possible mechanism was explored. The magnetic moment shows that anomalous increases when the temperature goes down away from the Néel temperature of 20-30 K......
Theoretical and experimental investigation on giant magnetoresistive materials with amorphous ferromagnetic layer WEN Qi-ye(文岐业), ZHANG Huai-wu(张怀武), SONG Yuan-qiang(宋远强), JIANG Xiang-dong(蒋向东...-spin-valve (PSV) sandwiches using amorphous CoNbZr alloy as soft magnetic layer were fabricated by magnetron sputtering. The giant magnetoresistance (GMR) and its dependence on the thickness......
Micro and sub-micro morphology of Mg65Cu25Y10 bulk amorphous alloy containing primary crystalline phases GUAN Le-ding(关乐丁)1, 2, YAN Biao(严 彪)1, 2, YANG Sha(杨 沙)1, 2 1. Shanghai Key Laboratory of D&A for Metal-Functional Materials, Tongji University, Shanghai 200092, China; 2. School of Materials Science and Engineering, Tongji University, Shanghai 200092, China Received 15......