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Performance Improved by Incorporating of Ru Atoms into Zr-Si Diffusion Barrier for Cu Metallization

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Chinese Physics Letters 2012年第9期29卷 215-218页

作者： WANG Ying SONG Zhong-Xiao zhang mi-lin College of Information and Communication Engineering Harbin Engineering UniversityHarbin 150001 State-Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi'an 710049 Key Laboratory of Superlight Materials and Surface Technology(ministry of Education) Harbin Engineering UniversityHarbin 150001

Thin Ru_(21)Zr_(64)Si_(15) films deposited on Si substrates by radio frequency reactive magnetron sputtering are studied and evaluated as diffusion barriers for Cu ***/Ru_(21)Zr_(64)Si_(15)/Si and Cu/Zr_(67)Si_(33)/Si structure samples are prepared under the same procedures for *** thermal stability,phase formation,surface morphology and atomic depth profile of the Cu/Ru_(21)Zr_(64)Si_(15)/Si and Cu/Zr_(67)Si_(33)/Si structures before and after annealing at different temperatures are *** conjunction with these analyses,the Cu/Ru_(21)Zr_(64)Si_(15)/Si contact system shows high thermal stability at least up to 650℃.The results obtained reveal that the incorporation of Ru atoms into the Zr_(67)Si_(33) barrier layer is shown to be beneficial for improving the thermal stability of the Cu/barrier/Si contact system.

关键词： stability barrier thermal

Comparable Studies of Adsorption and Magnetic Properties of Ferrite MnFe_2O_4 Nanoparticles,Porous Bulks and Nanowires

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Chemical Research in Chinese Universities 2011年第4期27卷 543-546页

作者： HOU Xiang-yu FENG Jing LIU Xiao-han zhang mi-lin Key Laboratory of Superlight Materials ＆ Surface lechnology Ministry of Laucation Harbin Engineering University Harbin 150001 P. R. China Institute of Seawater Desalination and Multipurpose Utilization Tianjin 300192 P. R. China

The spinel ferrites MnFe2O4 nanowires were synthesized by hydrothermal route,porous MnFe2O4 and nanoparticles morphologies were synthesized by sol-gel method with egg *** structures,morphologies,magnetic properties and adsorption properties of these obtained ferrites with different morphologies were studied *** show that the obtained samples exhibit ferromagnetic *** realizes convenient magnetic separation from solution when they are used in the treatment of organic dyes ***,the contrastive studies show that the saturation magnetizations（Ms） of MnFe2O4 with different morphologies are different and the Ms follows the order：Ms（porous）〈Ms（nanoparticles）〈Ms（nanowires）.In addition,the adsorptions of methylene blue（MB） onto these ferrites depend on ferrites＇ morphologies *** adsorption rate of MB on the porous MnFe2O4 is much higher than those onto the other two samples because the porous structure can provide high efficient mass transport through the pores.

关键词： MnFe2O4 Ferromangetism Adsorption property Nanowire Nanoparticle Porous ferrite

Electrochemical Formation of AI-Li Alloys by Codeposition of AI and Li from LiCI-KCI-AIF3 Melts at 853 K

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Chemical Research in Chinese Universities 2013年第2期29卷 324-328页

作者： SUN Yi zhang mi-lin HAN Wei LI Mei YANG Yu-sheng Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 P. R. China

The electrochemical behavior of AI（III） ions was studied in molten LiC1-KC1 melts on a molybdenum electrode. Cyclic voltammetry, chronopotentiometry and chronoamperometry were used to explore the deposition mechanism of A1 and Li. Cyclic voltammetry expriment indicates that under potential deposition（UPD） of lithium on pre-deposited aluminium led to the formation of liquid A1-Li alloys at 853 K. The diffusion coefficient of AI（III） ions at 853 K in LiC1-KC1-AIF3（I%, mass fraction） melts was determined to be （2.79~0.05）x 10_5 cm2/s. Chronopotentio- grams and chronoamperograms demonstrate that the codeposition of AI（III） and Li（I） ions formed A1-Li alloys at ca- thodic current densities higher than -0.28 A/cm2 or cathodic potentials more negative than -2.20 V. X-Ray diffrac- tion（XRD） pattern indicates that A1-Li alloys with different phases formed via galvanostatic electrolysis. Inductively coupled plasma（ICP） analyses of the samples obtained by electrolysis show that lithium and aluminium contents of A1-Li alloys could be controlled by A1F3 concentration and current intensity.

关键词： Electrochemistry A1-Li alloy Codeposition Cyclic voltammetry

Electrochemical formation and phase control of Mg-Li alloys

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Chinese Chemical Letters 2007年第9期18卷 1124-1128页

作者： zhang, mi lin Chen, Zeng Han, Wei Lv, Yan Zhuo Wang, Jun Harbin Engn Univ Key Lab Superlight Mat & Surface Technol Minist Educ Harbin 150001 Peoples R China

The electrochemical formation of Mg-Li alloys was investigated in a molten LiCl-KCl (58-42 mol%) eutectic melt at 723 K. The cyclic voltammogram. for a Mo electrode showed that the electroreduction of Li+ proceeds in a single step and the deposition potential of Li metal was -2.40 V (vs. Ag/AgCl). For Mg electrode, the electroreduction of Li+ takes place at less cathodic potential than that at the Mo electrode which was caused by the formation of Mg-Li alloys. Phase of the deposited Mg-Li alloys could be controlled by the electrolysis potential, and the samples were characterized by X-ray diffraction and scanning electron microscopy. The results showed that alpha-Mg and beta-Li phases were obtained at -2.35 and -2.55 V, respectively. (c) 2007 mi lin zhang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： LiCl-KCl molten salt electrodeposition Mg-Li alloy

Comparison of the Sol-gel Method with the Coprecipitation Technique for Preparation of Hexagonal Barium Ferrite

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Chemical Research in Chinese Universities 2008年第5期24卷 525-528页

作者： WANG Jing-ping LIU Ying zhang mi-lin QIAO Ying-jie XIA Tian College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 P. R. China Laboratory of Functional Materials College of Chemistry and Chemical Technology Heilongfiang University Harbin 150080 P. R. China

Hexagonal barium ferrite BaFe12O19 particles were prepared by sol-gel and coprecipitation methods, respectively. The composition of the so-obtained materials was investigated by means of XRD. By the sol-gel method, non-anticipated intermediate crystalline phases, such as γ-Fe2O3, α-Fe2O3, BaCO3, and BaFe2O4 etc., were formed with the delay of the formation of BaFe12O19. The formation of single phase BaFe12O19 required calcination at 850 oC for 4 h. On the other hand, using coprecipitation technique, amorphous hydroxide precursor was directly transferred into BaFe12O19 almost without the formation of intermediate crystalline phases. BaFe12O19 was prepared by calcining at 700 oC for 3 h. The results were confirmed by ESEM and VSM analyses. Based on the already reported results and the observed results in this study, it can be concluded that the coprecipitaion technique is easier to control than the sol-gel method for preparation of BaFe12O19 at a low temperature.

关键词： Sol-gel Coprecipitation Barium ferrite

Preparation and Magnetic Property of La_(0.7)Sr_(0.3)MnO_3 Nanorod by Combination Sol-Gel with Molten Salt

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Chemical Research in Chinese Universities 2008年第6期24卷 672-674页

作者： QI Shu-yan FENG Jing XU Xiao-dong WANG Jing-ping HOU Xiang-yu zhang mi-lin Key Laboratory of Superlight Materials ＆ Surface Technology of ministry of Education Harbin Engineering University Harbin 150001 P. R. China

La0.7Sr0.3MnO3（LSMO） nanorods were synthesized by a method combining sol-gel with molten salts at 950 ℃ for 10 h, which employed KCl＋NaCl（mass ratio 4：1） as eutectic molten salts. The morphologies and magnetic properties of the resulting LSMO nanorods were investigated by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, and vibrating sample magnetometer（VSM） measurements. It was found that the obtained perovskite manganite LSMO was a uniform nanorod with a diameter of about 50 nm and a length of longer than 500 rim. The Curie temperature（To） of the LSMO nanorod used here was 262 K, much lower than that of bulky single crystal LSMO（360 K）. The low Curie temperature might be a result of the great disorder near the grain boundary, which could be observed clearly from the TEM picture.

关键词： Molten salt synthesis Sol-gel processes Perovskite Nanostructured materials

Preparation of Mg-Li-La alloys by electrolysis in molten salt

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Transactions of Nonferrous Metals Society of China 2012年第1期22卷 16-22页

作者： zhang mi-lin CAO Peng HAN Wei YAN Yong-de CHEN Li-jun Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China

An electrochemical method was used to prepare Mg-Li-La alloys in a molten LiCl-KCl-KF-MgCl2 containing La2O3 at 943 K. The results showed preparation of Mg-Li-La alloys by electrolysis is feasible. The Mg-Li-La alloys were analyzed by means of X-ray diffraction （XRD）, optical micrograph （OM） and scanning electron microscopy （SEM）. XRD analysis indicates that α＋Mg17La2, α＋β＋Mg17La2 and β＋LaMg3 Mg-Li-La alloys with different lithium and lanthanum contents were obtained via galvanostatic electrolysis. The microstructures of typical α＋Mg17La2 and β＋LaMg3 phases of Mg-Li-La alloys were characterized by optical microscopy （OM） and scanning electron microscopy （SEM）. The analysis of energy dispersive spectrometry （EDS） shows that the element of Mg distributes homogeneously in the Mg-Li-La alloy and the element of La mostly exists at grain boundaries to restrain the grain growth rate due to the larger ionic radius and lower electronegativity compared with Mg.

关键词： Mg-Li-La alloys La2O3 electrolysis microstructure

尖晶石型LiMn_2O_4的制备及超级电容性能研究

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无机化学学报 2007年第1期23卷 109-112页

作者：薛云陈野张密林哈尔滨工程大学材料科学与化学工程学院哈尔滨150001

采用高温固相法制备LiMn2O4。X射线衍射结果表明800℃下得到尖晶石型LiMn2O4。利用恒流充放电、循环伏安和交流阻抗等研究了LiMn2O4电极材料在2mol·L-1(NH4)2SO4溶液中的超级电容性能。循环伏安测试结果表明LiMn2O4电极材料在0～1V电... 详细信息

采用高温固相法制备LiMn2O4。X射线衍射结果表明800℃下得到尖晶石型LiMn2O4。利用恒流充放电、循环伏安和交流阻抗等研究了LiMn2O4电极材料在2mol·L-1(NH4)2SO4溶液中的超级电容性能。循环伏安测试结果表明LiMn2O4电极材料在0～1V电位窗口范围内具有较好的方形特征;恒流充放电结果表明充放电曲线呈现出较规整的三角形对称分布,放电曲线呈直线关系,5mA·cm-2下的放电比容量为141F·g-1,具有较高的充放电效率,循环性能稳定;交流阻抗结果也显示LiMn2O4电极材料在2mol·L-1(NH4)2SO4中具有典型的电容阻抗特性。

关键词： LiMn2O4 超级电容器:高温固相法

超级电容器用LiMn_2O_4的制备与性能

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材料热处理学报 2008年第1期29卷 12-15页

作者：薛云陈野张密林哈尔滨工程大学材料科学与化学工程学院黑龙江哈尔滨150001

采用高温固相法制备尖晶石型LiMn2O4电极材料。XRD结果表明经700℃煅烧即可得到尖晶石型LiMn2O4样品。利用恒流充放电、循环伏安和交流阻抗等测试方法研究了合成过程中温度和时间对尖晶石型LiMn204电极材料在2mol·L^-1（NH4）2SO4溶液... 详细信息

采用高温固相法制备尖晶石型LiMn2O4电极材料。XRD结果表明经700℃煅烧即可得到尖晶石型LiMn2O4样品。利用恒流充放电、循环伏安和交流阻抗等测试方法研究了合成过程中温度和时间对尖晶石型LiMn204电极材料在2mol·L^-1（NH4）2SO4溶液中电容性能的影响。结果表明LiMn2O4电极材料具有较好的电容性能。恒流充放电和循环伏安结果表明，当煅烧温度700℃，恒温时间4—24h时，其容量并没有明显的变化，电流密度为10mA·cm^-2时，其放电比容量保持在127F·g^-1。交流阻抗结果也表明，LiMn2O4电极在2mol·L^-1（NH4）2SO4溶液中具有较好的电化学电容行为，700℃下煅烧的样品的溶液欧姆电阻仅为0．5Ω。

关键词： LiMn2O4 超级电容器高温固相法