材料期刊网

Application of Modified QuasiRegular Solution Model to Binary Metallurgical Molten Slag Systems

HOU Yanqing , XIE Gang , TAO Dongping , et al

钢铁研究学报(英文版)

Modified quasi-regular solution model has been got based on the sub-regular solution model and quasi-regular solution model in this article. The mixed energy parameter can be denoted a function of concentration and temperature. The three parameters of this model are fitted by the computer-assisted analysis based on the experiment data of activity at two different temperatures. Seven binary molten slag systems in the whole concentration are calculated with the application of the model and the average relative error is within 10%. That shows that the calculated result is agreement with the experiment data. Ten binary slag systems presenting saturation concentration are also calculated, but the average relative error is bigger. So the calculated result is not good agreement with the experiment data. But the calculated result is superior to regular solution model, sub-regular solution model and quasi-regular solution model.

关键词: Activity;Binary molten slag;Modified model;Sub-regular solution

Industrial Atmospheric Corrosion Resistance of PRE Weathering Steel

MI Fengyi , WANG Xiangdong , LIU Zhipu , WANG Bing , PENG Yun , TAO Dongping

钢铁研究学报(英文版)

The corrosion behavior of lowcarbon steel (CS), Pbearing steel (PS) and PRE weathering steel (PREWS) exposed for two years in Jiangjin of China was investigated. The results showed that during 2year exposure test, corrosion data of the experimental steels followed the bilogarithmic equation, and the average corrosion depth of PS and PREWS was decreased by 195% and 282% respectively compared with that of CS. Scanning electron microscope, electrochemical impedance spectroscope and Fourier transform infrared spectroscope were used to characterize the corrosion products. The research results showed that P in steel could promote the formation of an amorphous ferric oxyhydroxide layer near the substrate. The addition of RE could effectively increase the charge transportation resistance of rust.

关键词: weathering steel , industrial atmosphere , rust layer , synergistic effect

CSD-La3TaO7薄膜外延生长行为

王耀 , 李成山 , 于泽铭 , 冯建情 , 金利华 , 王辉 , 张平祥

稀有金属

研究CSD技术制备La3TaO7 (LTO)缓冲层过程中前驱液的热分解行为以及热处理工艺对薄膜取向生长的影响,通过选取恰当的LTO前驱液以及快速升温热处理的方法最终获得了良好c轴织构的LTO薄膜.

关键词: 涂层导体 , 缓冲层 , 化学溶液沉积

Bi3+,Eu3+,Tb3+掺杂Lu3TaO7的发光性能研究

刘文鹏 , 张庆礼 , 杨华军 , 周鹏宇 , 孙敦陆 , 高进云 , 谷长江 , 罗建乔 , 王迪 , 殷绍唐

量子电子学报 doi:10.3969/j.issn.1007-5461.2011.02.018

采用固相反应法制备了Bi3+、Eu3+、Tb3+掺杂的Lu3TaO7.测量了样品的X射线衍射谱、激发和发射光谱及荧光衰减曲线.三种离子掺杂的Lu3TaO7均呈现出强的荧光发射,其中Bi3+具有峰位在431 nm处的一强发射宽带,衰减寿命为16.8μs,Eu3+、Tb3+则表现出稀土离子的特征锐发射峰,衰减寿命分别为1.26 ms和1.20 ms.因此,它们均是具有潜在应用前景的重闪烁体材料.

关键词: 材料 , 闪烁体 , Lu3TaO7 , 发光

一种基于锡锑氧化物的透明PN结及整流特性

季振国 , 周荣福 , 毛启楠 , 霍丽娟 , 曹虹

无机材料学报 doi:10.3724/SP.J.1077.2009.09217

利用反应磁控溅射法制备了半导体锡锑氧化物薄膜 (TAO). 根据霍尔效应测试结果，当Sn/Sb 原子比处于0.22~0.33范围内时，TAO薄膜是p型导电的，在此范围之外，TAO薄膜是n型导电的. 光学带隙测量结果表明,不同Sn/Sb比的TAO薄膜的禁带宽度基本相同(~3.9eV).构造了一个全透明的PN结，其中n区为Sn/Sb原子比为0.5的TAO薄膜， p区为Sn/Sb原子比为0.33的TAO薄膜.n区TAO的电极用铟锡氧化物（ITO），p区TAO的电极用Cu薄膜.实验结果表明，由于两种导电类型的TAO薄膜具有相同的禁带宽度，上述透明PN结构具有典型的准同质PN结的整流特性.

关键词: 透明半导体薄膜 , antimony-tin oxide , PN junction

一种基于锡锑氧化物的透明PN结及整流特性

季振国 , 周荣福 , 毛启楠 , 霍丽娟 , 曹虹

无机材料学报 doi:10.3724/SP.J.1077.2009.09217

利用反应磁控溅射法制备了半导体锡锑氧化物薄膜 (TAO). 根据霍尔效应测试结果,当Sn/Sb 原子比处于0.22~0.33范围内时,TAO薄膜是p型导电的,在此范围之外,TAO薄膜是n型导电的. 光学带隙测量结果表明,不同Sn/Sb比的TAO薄膜的禁带宽度基本相同(～3.9eV).构造了一个全透明的PN结,其中n区为Sn/Sb原子比为0.5的TAO薄膜, p区为Sn/Sb原子比为0.33的TAO薄膜.n区TAO的电极用铟锡氧化物(ITO),p区TAO的电极用Cu薄膜.实验结果表明,由于两种导电类型的TAO薄膜具有相同的禁带宽度,上述透明PN结构具有典型的准同质PN结的整流特性.

关键词: 透明半导体薄膜 , 锡锑氧化物 , PN结

Ab initio study of the intrinsic exchange bias at the SrRuO(3)/SrMnO(3) interface

Physical Review B

In a recent publication [S. Dong et al., Phys. Rev. Lett. 103, 127201 (2009)], two (related) mechanisms were proposed to understand the intrinsic exchange bias present in oxides heterostructures involving G-type antiferromagnetic perovskites. The first mechanism is driven by the Dzyaloshinskii-Moriya interaction, which is a spin-orbit coupling effect. The second is induced by the ferroelectric polarization, and it is only active in heterostructures involving multiferroics. Using the SrRuO(3)/SrMnO(3) superlattice as a model system, density-functional calculations are here performed to verify the two proposals. This proof-of-principle calculation provides convincing evidence that qualitatively supports both proposals.

关键词: thin-films;weak ferromagnetism;superlattices;anisotropy;bifeo3;srruo3;model

Correctness and completeness of the theory of bio-energy transport Reply to the comments on "The theory of bio-energy transport in the protein molecules and its properties"

Physics of Life Reviews

Commentaries by Philip W.T. Pong, Nongyue He, S.D. Liang, Tao Song, Yuri Gaididei and Sergey Volkov and Alexander Y. Grosberg on my review article (Pang, 2011 [1]) are answered. The validity of Davydov's mechanism of bio-energy transport, the completeness of theory, outstanding problems, the normalization and validity of wave function of the system in Pang' model as well as other related problems are elucidated in detail. (C) 2011 Elsevier B.V. All rights reserved.

关键词: biological temperature;3 channels;soliton;model

镀钽TiNi形状记忆合金表面的XPS分析

成艳 , 蔡伟 , 李洪涛 , 郑玉峰 , 赵连城

功能材料

采用多弧离子镀的方法在Ti-50.6%(原子分数)Ni形状记忆合金表面沉积了钽镀层.通过X射线光电子能谱(XPS)剖面分析发现TiNi合金表面钽镀层厚度均匀,并且在镀层与基体之间形成一薄层过渡层.将镀钽TiNi合金曝露于空气中后,通过XPS的全谱和高分辨谱图对其表面的成分和价态分析发现,镀钽层表面由于钽在空气中自然氧化形成了一层很薄的钽的氧化膜,最表面为高价钽的氧化物(Ta2O5),次表面为低价钽氧化物的混合物TaO2、TaO和TaOx(x＜1).

关键词: TiNi形状记忆合金 , 多弧离子镀 , 钽 , 镀层

C/C复合材料表面TaC涂层的制备和生成机制

李江鸿 , 张红波 , 熊翔 , 肖鹏 , 黄伯云

稀有金属材料与工程

报道了一种在C/C复合材料基体上制各抗烧蚀TaC涂层的新方法.采用红外光谱、XRD及SEM表征了生成TaC涂层的Ta源:TaO2F·rH2O·TaF5.采用SEM观察了不同温度下转变生成的TaC涂层的形貌.在1200℃高温热处理,TaC涂层形貌为细颗粒状,在1800℃高温热处理后,TaC涂层为柱状晶.TaC的生成机制为:TaO2F·rH2O·TaF5高温分解凝聚生成的Ta2O5沉积在C/C复合材料基体表面,碳原子在Ta2O5中扩散反应生成TaC,TaC涂层形貌可由生成Ta2O5的凝聚成核理论解释.

关键词: TaC涂层 , 制备 , 生成机制