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Cu(Ⅱ)在谷氨酸根配合物体系中的电沉积行为 杨天足,雷存茂,刘伟,窦爱春,张杜超,刘伟锋 (中南大学 冶金科学与工程学院,湖南 长沙,410083) 摘要:采用循环伏安法研究谷氨酸根配合物体系中谷氨酸根离子的稳定性和铜在阴极的电沉积过程,利用线性扫描伏安法求体系的表观活化能,表观传递系数和交换电流密度;计时电流法判断铜在电极上的成核方式.实验结果表明:在扫描电位-1.5~3 V内,谷氨酸钠溶液中仅有水的电解反应,谷氨酸根离子无氧化还原反应;铜在阴极沉积时为不可逆过程;循环伏安曲线的感抗环说明铜在阴极沉积时经历了电结晶过程;由线性扫描伏安法求得表观活化能为34.065 kJ/mol,表观传递系数为0.360,电流交换密度为0.105 A/m2;铜在不锈钢电极上的成核方式为连续成核. 关键词:Cu(Ⅱ);谷氨酸配合物体系;电化学;电沉积 中图分类号:TQ150.1 ......
of metastable phases for Al-Mg-Si-(Cu) alloy were further gained. The results show that the addition of Cu enhances the age-hardening effect and precipitation kinetics, which may be due to the decrease of precipitation activation energy caused by the addition of Cu. The average activation energies associated with the precipitation of Si/Mg/Si-Mg clusters, GP-zones, β〞and β′ phases in Al-Mg-Si......
Trans. Nonferrous Met. Soc. China 23(2013) 2657-2665 Adsorption behavior and adsorption mechanism of Cu(II) ions on amino-functionalized magnetic nanoparticles Hui LI1, De-li XIAO1, Hua HE1,2, Rui...-functionalized magnetic nanoparticle (NH2-MNP) were prepared by a sol-gel approach. The adsorption behavior of Cu(II) ions on NH2-MNP was discussed systematically by batch experiments. The effects......
an intermediate chemical step where the cuprous ion (Cu+) was complexed by chloride to form the dichlorocuprous anion (CuCl-). In addition, interference effect was also investigated when Fe3+ existed... with a correlation coefficient of 0.997. Therefore, the addition of Cl- into this system can increase the Cu (II) detection range to 100 mmol/L (6.4 g/L). The characteristic 4-peak voltammograms......
; 文献标识码:A Effect of Cu addition on precipitation phases at early stage in 6082 Al-Mg-Si alloy aged JIN Man, SHAO Guang-jie (School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China) Abstract: The effect of Cu addition on the GP zones of 6082Al-Mg-Si alloy during the early stage of ageing at 170℃ was investigated by transmission......
Be晶粒的生长取向,使其形成更为紧凑的薄膜结构.这些因素使得掺杂Cu的Be薄膜的表面粗糙度明显降低. 关键词:铍;薄膜;铜掺杂;微结构 (Edited by YANG Hua) Foundation item: Project (60908023) supported by the National Natural Science Foundation of China Corresponding... Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China Received 31 May 2011; accepted 25 October 2011 Abstract: Copper (Cu) doped beryllium (Be) thin films were deposited......
Ag合金相当, 但塑性有所下降. 在时效过程中, 微量Ag会促进过渡相的形成, 并提高GP区和过渡相的稳定性, 但使合金到达峰值的时间延长. 关键词: Al-Zn-Mg-Cu合金; 微观组织; 力学性能; 微量Ag 中图分类号: TG146.2 文献标识码: A Effect of small addition of silver on microstructure...) Abstract: The effect of small addition of silver on a high-zinc super-high strength Al-Zn-Mg-Cu aluminum alloy was investigated. The mechanical properties of the investigated alloys with or without silver......
originates melting of the bare Cu nanoparticles. In addition, due to good wetting property on steel surface, the liquid copper may well wet the friction pairs. Afterwards, it can be smeared on the worn... Tribological properties and lubricating mechanisms of Cu nanoparticles in lubricant YU He-long(于鹤龙), XU Yi(许 一), SHI Pei-jing(史佩京), XU Bin-shi(徐滨士), WANG Xiao-li(王晓丽), LIU Qian(刘 谦) National......
Cu对纳米晶复合合金Nd9.5Fe76-xCuxCo5Zr3B6.5(x=0~2)磁性能的影响侯金超1,徐晖1,谭晓华1,满华1,侯雪玲1,白琴1(1.上海市上海大学材料研究所)摘 要:采用快淬后真空晶化处理的方法制备出纳米晶复合合金Nd9.5Fe76-xCo5Zr3CuxB6.5(x=0~2),系统地研究了Cu元素对其磁性能的影响.结果表明:适量Cu元素的添加,可以提高磁体的剩磁Br,内禀矫顽力jHc和最大磁能积(BH)max,并且可以有效地提高磁体的剩磁温度系数α,但使磁体的矫顽力温度系数β略有降低.当Cu含量为0.25 at%时,该磁体具有最佳的综合磁性能:(BH)max=79 kJ/m3,jHc=685 kA/m,Br(T)=0.713 T;剩磁温度系数α20~150℃=0.071%/℃;矫顽力温......