检索结果-南通市图书馆

Study on Electrochemical Formation of Neodymium-Iron Alloy

在线全文

学校读者我要写书评

暂无评论

Rare Metals 1989年第3期9卷 9-14页

作者： Yang, Qiqin liu, guankun Fang, Zhongan Sha, Lichang Zhongshan Univ China

The cyclic voltammetry was used to investigate the electrode processes of Nd(III) reduced on iron electrode and Nd(III),Fe(II) reduced on molybdenum electrode in molten chlorides. The Nd-Fe and Nd-rich RE-Fe alloys contained rare earth up to 90wt% were prepared by consumable cathode and electrolytic codeposition. The mechanism of electrochemical formation of Nd-Fe alloy had been discussed.

关键词： Electrolytic Analysis Magnets Manufacture Neodymium Compounds Electrolytic Reduction Neodymium Iron Boron Alloys Magnetic Properties Salts Molten

Preparation of Gd Co alloy in dimethylsulfoxide by electrodeposition method

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1999年第3期9卷 638-640页

作者： Tong Yexiang(童叶翔) liu guankun(刘冠昆) He Shan(何山) Wang Yu(王宇) Zhongshan Univ Sch Chem & Chem Engn Guangzhou 510275 Peoples R China

Electrodeposition of Gd Co alloy film from dimethylsulfoxide (DMSO) electrolyte solutions has been investigated using cyclic voltammogram and potentiostatic technique. Potentiostatic depositions between -1.20 V and -2.70 V were applied to uncomplexed and complexed solution. The deposits obtained at potentials within -2.30～-2.70 V from complexed solutions are silver gray smooth films.

关键词： Gd Co alloy electrodeposition dimethylsulfoxide

Electrochemical investigation on the formations of Dy-Ni alloy films in dimethylformamide

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2002年第2期21卷 85-89页

作者： HE Fengrong, WANG Yu, liu guankun, and SA LichangSchool of Chemistry and Chemical Engineering, Zhongshan University. Guangzhou 510275, China School of Chemistry and Chemical Engineering Zhongshan University Guangzhou 510275

The elexctrochemical properties of Dy (III), Ni(II) + Ni(II) indimethylformamide were studied by cyclic voltammetry on Pt or Cuelectrode. Black, metallic lustered, compact and well adhesive Dy-Nialloy films can be co-deposited on Cu electrode bysweeping-potential-deposition method within some potentials. SEM,EDAX and XRD were used to analyze the alloy films. The Dy content inthe Dy-Ni alloy film is up to 56.91/100 (mass fraction) and the Dy-Ni alloy films are amorphous.

关键词： Dy-Ni alloy film dimethylformamide (DMF) Sweeping-potential-deposition-method induced coi-deposition

ELECTROCHEMICAL ALLOYING OF Ni IN MOLTEN NaCl-KCl-PrCl_3

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1992年第11期5卷 346-350页

作者： YANG Qiqin liu guankun TONG Yexiang LIANG Guangchao Zhongshan University,Guangzhou,China

The cyclic voltammetry,electrode potential-time curve after potentiostatic electrolysis, potential-step method and X-ray diffraction were used to study the electrode process of Pr(Ⅲ)reduced on Ni electrode in molten NaCl-KCl-PrCl_*** PrNi_5 forms at first and then the intermetallic compounds of Pr-Ni containing more Pr form in *** metallic Pr deposits at *** standard free energies of formation for PrNi_5 determined are-123.6,-118.9 and-114.4 kJ mol^(-1) at 1023,1073 and 1123 K *** diffusion coefficient of Pr into PrNi_5 phase determined is 3×10^(-11) cm^2 s^(-1) at 1073 K.

关键词： electrochemical alloying Pr-Ni alloy Ni NaCl-KCl-PrCl_3

FREE ENERGIES OF FORMATION FOR ELECTROCHEMICALLOY ALLOYED Y-Cu SYSTEM

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1990年第7期3卷 28-32页

作者： YANG Qiqin liu guankun liu Zejin Zhongshan University,Guangzhou,China YANG Qiqin,Associate Professor,Department of Chemistry,Zhongshan University,Guangzhou,China

The electrochemical alloying of Y-Cu system in molten NaCl-KCl-YCl_3 has been investi- *** free energy changes of the formation reactions of the intermetallic compounds,in- cluding YCu_6 ,YCu_4 YCu_2 ,Yfu(973—103 K),were determined by means of electrode potential-time curves of the working electrode after potentiostatic *** results in- dicate that the potential-time method is simple and reliable.

关键词： Y-Cu system free energy of formation electrochemical alloying

ELECTRODEPOSITION OF Ti-Ni ALLOY IN UREA-NaBr-KBr MELT

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1998年第1期8卷 139-142页

作者： Yang Qiqin, liu guankun, Ke Shan and Tong YexiangDepartment of Chemistry, Zhongshan University, Guangzhou 510275, P. R. China

ＥＬＥＣＴＲＯＤＥＰＯＳＩＴＩＯＮＯＦＴｉＮｉＡＬＬＯＹＩＮＵＲＥＡＮａＢｒＫＢｒＭＥＬＴ①ＹａｎｇＱｉｑｉｎ，ＬｉｕＧｕａｎｋｕｎ，ＫｅＳｈａｎａｎｄＴｏｎｇＹｅｘｉａｎｇＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓ... 详细信息

ＥＬＥＣＴＲＯＤＥＰＯＳＩＴＩＯＮＯＦＴｉＮｉＡＬＬＯＹＩＮＵＲＥＡＮａＢｒＫＢｒＭＥＬＴ①ＹａｎｇＱｉｑｉｎ，ＬｉｕＧｕａｎｋｕｎ，ＫｅＳｈａｎａｎｄＴｏｎｇＹｅｘｉａｎｇＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＺｈｏｎｇｓｈａｎＵｎｉｖ...

关键词： ureaNaBrKBr melt electroreduction of Ni(Ⅱ) electrodeposition of TiNi alloy

ELECTROREDUCTION OF Yb(Ⅲ) ON NICKEL CATHODE IN MOLTEN CHLORIDE

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1998年第3期8卷 161-164页

作者： liu guankun, Tong Yexiang, Yang Qiqin, Hong Huichan and Chen Shengyang School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 510275, P. R. China

１ＩＮＴＲＯＤＵＣＴＩＯＮＹｂＮｉａｌｏｙｃａｎｂｅｕｓｅｄｔｏｍａｎｕｆａｃｔｕｒｅｆｕｎｃｔｉｏｎａｌｍａｔｅｒｉａｌｓ［１，２］．Ｉｔｉｓｎｅｃｅｓａｒｙｔｏｓｔｕｄｙｔｈｅｅｌｅｃｔｒｏｃｈｅｍｉｃａｌｂｅ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＹｂＮｉａｌｏｙｃａｎｂｅｕｓｅｄｔｏｍａｎｕｆａｃｔｕｒｅｆｕｎｃｔｉｏｎａｌｍａｔｅｒｉａｌｓ［１，２］．ＩｔｉｓｎｅｃｅｓａｒｙｔｏｓｔｕｄｙｔｈｅｅｌｅｃｔｒｏｃｈｅｍｉｃａｌｂｅｈａｖｉｏｕｒｏｆＹｂ（Ⅲ）ｏｎＮ...

关键词： Yb(Ⅲ) electroreduction molten chloride

二甲亚砜中电沉积La-Co合金膜的研究(英文)

在线全文

学校读者我要写书评

暂无评论

中山大学学报（自然科学版） 2001年第4期40卷 84-87页

作者：袁定胜黄开胜刘冠昆童叶翔中山大学化学与化学工程学院广东广州510275

研究在非水溶剂二甲亚砜中电沉积Ｌａ－Ｃｏ合金膜．体系中加入柠檬酸为络合剂，聚乙醇－ｌ０００为添加剂，用于改善沉积层的质量．在沉积过程中，应用了恒电位电解技术和脉冲电解技术．所得Ｌａ－Ｃｏ合金膜的表面是光滑，致密，粘... 详细信息

研究在非水溶剂二甲亚砜中电沉积Ｌａ－Ｃｏ合金膜．体系中加入柠檬酸为络合剂，聚乙醇－ｌ０００为添加剂，用于改善沉积层的质量．在沉积过程中，应用了恒电位电解技术和脉冲电解技术．所得Ｌａ－Ｃｏ合金膜的表面是光滑，致密，粘附性好和有金属光泽．恒电位电解技术沉积得到的Ｌａ－Ｃｏ合金膜中Ｌａ的质量分数是２２．４２％～５０．２９％．脉冲电解技术沉积得到的Ｌａ－Ｃｏ合金膜中Ｌａ的质量分数是１．４６％～４２．６３％．脉冲电解技术沉积得到的Ｌａ－Ｃｏ合金膜通过电镜观察发现金属粒子的大小约为１００ｎｍ．

关键词：二甲亚砜镧-钴合金膜电沉积恒电位电解技术脉冲电解技术络合剂添加剂

在线全文

学校读者我要写书评

暂无评论

在二甲基亚砜中电化学制备铈钴合金

中国稀土学报 2004年第Z1期22卷 315-318页

作者：柯琴芳周豪刘冠昆中山大学化学与化学工程学院广东广州510275

利用循环伏安法和恒电位电解法研究了室温下在二甲基亚砜中铈钴合金膜的电化学制备.结果表明,二甲基亚砜中Ce(Ⅲ)在Pt电极上的还原反应为一步完全不可逆反应.控制沉积电位在-2.10V～2.30V,利用恒电位电解得到表面平滑,附着力好,铈含量为... 详细信息

利用循环伏安法和恒电位电解法研究了室温下在二甲基亚砜中铈钴合金膜的电化学制备.结果表明,二甲基亚砜中Ce(Ⅲ)在Pt电极上的还原反应为一步完全不可逆反应.控制沉积电位在-2.10V～2.30V,利用恒电位电解得到表面平滑,附着力好,铈含量为37wt%～45wt%的铈钴合金膜.

关键词：复合材料四针状氧化锌晶须/聚丙烯表面改性力学性能