M.D. Starostenkov
,
E. V.Kozlov
,
O. V. Andruhova
,
N. V. Lomskikh
,
N.M. Gurova and A. V. Borissov 1) General Physics Department
,
ASTU
,
Lenin St. 46
,
Barnaul
,
656099
,
Russia 2) Physics Department
,
TSABU
,
Solyanaya Sq.
,
2
,
Tomsk
,
634003
,
Russia
金属学报(英文版)
The kinetics of internal boundaries relaxation: antiphase domain boundaries and interphase boundaries-in the conditions of high-temperature annealing and the structure transformations are investigated in homophase and heterophase systems. Homophase systems look like ordered binary alloy and include antiphase domain boundaries of various orientation. Clear components border on ordered alloy in heterophase systems and two processes take place simultaneously here-disordering of binary alloy and solution in ordered phase of clear component. Computer experiment is realized in the sphere of temperatures close to the temperature of order-disorder phase transition in the limits of two-dimensional model of atom diffusion at the vacant knots of crystal lattics.
关键词:
computer simulation
,
null
,
null
,
null
,
null
Acta Chimica Sinica
Passive film formed on 304 stainless steel in 2.5 mol/L H2SO4 solution by using alternating voltage (A. V.) passivation have been investigated by measuring capacitance and photoelectrochemical parameters. The investigation of the effect of measure frequency on the slope of Mott-Schottky curve has been carried out. The photoelectrochemical measurements were consistent with the capacitance measurement. Analysis of the experimental results showed that the passive film formed 304 stainless steel by using A. V. passivation exhibits semiconducting properties. Using the simple model of semiconductor rather than the multi-donor level model can explain satisfactorily the semiconducting behavior of the film formed on 304 stainless steel by using A.V. passivation.
关键词:
A. V. passivation;passive film;semiconducting properties;stainless;steel;model;electrodes
Journal of Alloys and Compounds
The formation of impurity Li(x)Ni(1-x)O when synthesizing spinel LiNi(0.5)Mn(1.5)O(4) using solid state reaction method, and its influence on the electrochemical properties of product LiNi(0.5)Mn(1.5)O(4) were studied. The secondary phase LixNi(1-x)O emerges at high temperature due to oxygen deficiency for LiNi(0.5)Mn(1.5)O(4) and partial reduction of Mn(4+) to Mn(3+) in LiNi(0.5)Mn(1.5)O(4). Annealing process can diminish oxygen deficiency and inhibit impurity Li(x)Ni(1-x)O. The impurity reduces the specific capacity of product, but it does not have obvious negative effect on cycle performance of product. The capacity of LiNi(0.5)Mn(1.5)O(4) that contains Li(x)Ni(1-x)O can deliver about 120 mAhg(-1). (C) 2011 Elsevier B.V. All rights reserved.
关键词:
Lithium ion batteries;LiNi(0.5)Mn(1.5)O(4);Impurity Li(x)Ni(1-x)O;Electrochemical properties;lithium batteries;rate capability;spinel;performance
Thin Solid Films
Single and double layers of tungsten oxide and vanadium oxide thin films have been deposited on In2O3:SnO2 (ITO) glass using the pulsed laser deposition (PLD) technique at a substrate heating temperature of 200 degreesC and in rich oxygen pressure. The structural properties and chemical composition of as-deposited WO3(V) and V2O5(Ti) thin films were analyzed using X-ray diffraction (XRD), Raman spectrum (RS), and X-ray photo-electron spectroscopy (XPS). The as-deposited V2O5 doped WO3 thin film on ITO glass showed an amorphous structure. Highly oriented growth nano-crystalline TiO2 doped V2O5 thin films with polycrystalline orthorhombic structure were successfully synthesized on ITO glass using the scanning laser ablation technique at a deposition temperature as low as 200 degreesC. Cyclic voltammograms, at a sweep rate of 50 mV s(-1), show that long-term degradation was noticed for the as-deposited WO3(V) thin film, and no Ion-term degradation was noticed for the as-deposited double layer WO3(V)/V2O5(Ti) thin film. Durability was verified to 8000 cycles in the voltage range between -1.0 and 1.0 V. It is demonstrated that these double layer WO3(V)/V2O5(Ti) thin films on ITO are good candidates for cathode thin films for rechargeable batteries and electrochromic devices. As the additional top layer of V2O5M) possesses nano-crystalline and c-axis oriented structure, which is suitable for Li-ions transport, the cycle stability and reversibility of WO3(V) films have been improved. Double layer WO3(V)/V2O5(Ti) thin films provide a neutral brownish blue electrochromic color. Therefore, this double layer film maybe suitable for most building applications. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词:
V2O5(Ti);WO3(V) thin films;double layers;pulsed laser deposition;technique;electrochromic properties;chemical-vapor-deposition;vanadium-titanium-oxide;electrical-properties;optical-properties;induced coloration;v2o5;wo3;growth;no2
林枫凉
,
薛立新
,
朱斌
,
王大志
,
俞文海
材料研究学报
<正> 蒙脱石是一种丰富廉价的天然矿物,具有开放的层状结构和良好的离子导电性,已被用于固态电池。本文使用蒙脱石为固体电解质研究了可充电的Zn/V_2O_5固态电池的性能。Zn/V_2O_5固态电池的开路电压随着V_2O_5复合阴极中V_2O_5含量的减少而下降,其变
关键词:
吴广明
,
吴永刚
,
倪星元
,
周箴
,
张慧琴
,
金哲民
,
吴翔
无机材料学报
本文采用真空蒸发制备了V2O5薄膜，用电化学方法从Li离子电解质中向V2O5薄膜注入Li离子.研究了V2O5薄膜中Li离于储存特性、注入／退出可逆性以及电荷注入对其光学性能的影响．实验结果表明，V2O5薄膜具有较好的Li离子储存特性和注入／退出可逆性，Li离子的注入量受到膜中V5+的含量以及锂离子可占据的总位置数限制，而且离子注入后V2O5薄膜的光学性能变化较小．
关键词:
薄膜
,
null
,
null
,
null
杨绍利
,
徐楚韶
,
胡再勇
,
陈光碧
钢铁钒钛
doi:10.3969/j.issn.1004-7638.2001.04.006
用攀钢工业V2O5为原料,采用无机溶胶-凝胶法制备出透明、导电的V2O5薄膜,并实测了电阻率.实验制作的V2O5薄膜电阻率对温度、湿度比较敏感,是一种很好的湿敏材料.薄膜烘干后电阻率减小,吸收水分后电阻率又增大.增加薄膜厚度则其电阻率增大.
关键词:
溶胶-凝胶法
,
V2O5
,
薄膜
,
电阻率
徐天华
,
赵越
,
孙彬
,
付恒磊
,
宋伟
功能材料
为进一步优化ZnCr2O4-V2O5-Li2O-ZnO湿敏材料的性能,对制备工艺做了3点改进:在玻璃相V2O5-Li2O-ZnO中掺加SiO2,将晶相原料进行高温烧结；重新筛选烧结制度；测试了样品感湿特性,取得了预期效果.在分析样品微观结构的基础上,对实验结果作了理论解释.
关键词:
湿敏材料
,
晶相
,
玻璃相
,
感湿特性
