SmMn2Si2金属间化合物的合成和结构研究

用真空电弧熔炼合成ＳｍＭｎ２Ｓｉ２金属间化合物，并对合成条件进行研究，用Ｘ－射线衍射，电子衍射和Ｘ－射线光电子能谱法对合成的化合物进行结构表征。结果表明：ＳｍＭｎ２Ｓｉ２属ＴｈＣｒ２Ｓｉ２型体心四方晶系结构，晶格常数ａ＝３．９８５Ａ，ｃ＝１０．４９０Ａ，化合物中钐和硅的特征轨道，（３ｄ５／２，２ｐ３／２）结合能较单质状态分别减少０．６ｅＶ和增加０．３ｅＶ。     

Electrochemical characteristics and synergetic effect of Ti0.10Zr0.15V0.35Cr0.10Ni0.30-10 wt.%LaNi5 hydrogen storage composite electrode

In order to improve performance of Ti-V-based solid solution alloy, electrochemical characteristics and synergetic effect of Ti0.10Zr0.15V0.35Cr0.10Ni0.30-10 wt.%LaNi5 hydrogen storage composite electrode prepared by two-step arc-melting were investigated system-atically. X-ray diffractometry (XRD) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) showed that the main phase of composite alloy was composed of V-based solid solution phase with a BCC structure and C14 Laves phase with hexagonal structure, while secondary phase also existed in the composite alloy. The results showed that electrochemical characteristics of the composite alloy elec-trode were significantly improved. It was suggested that synergetic effect appeared in the maximum discharge capacity of the composite alloy, synergetic effect of the discharge capacity appeared in the activation process, in the composite process, in the cyclic process, in the discharge process at low/high temperature and at different current densities, and synergetic effect existed in the charge-transfer resistance and in the ex-change current density, which seemed to be related to formation of the secondary phase.     

锂离子电池正极材料Li3V2(PO4)3的研究进展

Li3V2(PO4)3具有较高的能量密度、更好的电化学性能和热力学稳定性而成为潜在的、最有前途的锂离子电池正极材料。本文对Li3V2(PO4)3研究现状进行了全面介绍,综述了其电化学性能、微观结构、制备方法、改性研究以及其他研究,提出了目前研究中存在的问题,并就Li3V2(PO4)3作为锂离子电池正极材料的研究前景进行了展望。     

浅议铝电解槽制备铝—稀土合金方法

本文评述了制备铝—稀土合金的三种方法。混熔对掺法,铝热还原法和熔盐电解法的优缺点及适用性。论述了工业铝电解槽中添加稀土碳酸盐稀土氧氯化物或稀土氧化物直接生产铝—稀土合金新工艺的各自特点。从理论上阐述了铝电解槽中铝和稀土离子可共电沉积及铝热还原生成铝—稀土合金的机理。铝电解槽添加稀土化合物是目前生产铝—稀土合金的主要方法。提出了铝电解槽中产品合金化的方向。     

Diffusion Coefficient of Lanthanum in Al-Cu Alloy

In molten salt media,the rate of mass transfer process is slower than that of the charge transfer processof an electrochemical reaction.This is attributed to the high temperature which can propagate the rate of thecharge transfer process.Being the slowest,the diffusion process is the rate determining step in anelectrochemical reaction.The diffusion coefficient of lanthanum in Al-Cu alloy is determined byelectrochemical method,which will provide very important data for the study of co-deposition of lithiumwith rare earth ions in fused chlorides.     

稀土铝合金在硫酸、草酸溶液中的阳极氧化

本文对添加稀土的铝合金在硫酸和草酸溶液中进行了阳极氧化,比较系统地作了电解液浓度、湿度、电流密度、氧化时间诸因素对氧化膜厚度影响,试验结果表明:稀土铝合金膜层致密,稀土含量为0.29%时为宜;并研究了影响膜厚度的诸因素,找到了较好的工艺条件。     

60KA铝电解槽添加稀土碳酸盐制取铝—稀土应用合金工艺的研究

一、前言稀土在铝电线、电缆、铝制品和铝型材及某些交通工具的零部件等方面日益广泛的应用,推动着铝—稀土合金的研制工作迅速发展。氯化物熔盐电解制备铝—稀土中间合     

稀土LD31挤压铝合金氧化膜物性的研究

近年来,铝质材料在建筑业方面取得极广泛的应用。建筑用铝合金的装饰与防护系数是采用硫酸溶液,阳极氧化后,用电解着色方法着成青铜-古铜色系,使其具有古朴、典雅。庄重的外观。引起世界各国科学家、建筑家和工艺美术家极大的兴趣。改善铝合金着色防护层的性能,对延长材料的使用寿命和开拓功能材料新用途都具有重要意义。     

较低温度下电解制备铈族混合稀土-铝中间合金的研究

本文介绍了较低温度下电解制取铈族混合稀土-铝中间合金的研究,提出了690-750℃低温电解稀土-铝中间合金的工艺。该工艺代替了过去常用的800—900℃的合金电解工艺,电流效率达86％,直收率100％,总收率91％,材料和电能消耗显著降低。