材料期刊网

Microstructure and Deformation Behavior of Ti-10V-2Fe-3Al Alloy during Hot Forming Process

GUAN Renguo , ZHAO Zhanyong , Choi KS , Lee CS

武汉理工大学学报-材料科学版(英文版) doi:10.1007/s11595-015-1317-0

关键词:

125Cs的能级结构

马英君 , 小松原哲郎 , 王守宇 , Cederwall B , Nyberg J , 张玉虎 , 古野兴平 , 李容俊 , Sletten G , Hagemann G , Jensen H , Gjorup N , 刘运祚

原子核物理评论 doi:10.3969/j.issn.1007-4627.2004.04.018

通过116Cd(14N,5n), Ebeam=65 MeV的核反应布居了125Cs的高自旋态. 利用在束γ谱学实验方法,进行了γ-γ符合测量, 使已知的125Cs核能级纲图得到了扩展, 并且修正了某些组态的带头激发能.

关键词: 高自旋态 , 能级纲图 , 转动带 , Nilsson单粒子组态

CS型稀土镀铬添加剂的应用体会

白祯遐 , 任星明

表面技术 doi:10.3969/j.issn.1001-3660.2000.02.017

介绍了CS型稀土添加剂在镀铬中的应用和产生的经济效益.

关键词: CS型稀土 , 电镀铬 , 添加剂

Cs-K混合蒸气中Cs(8D)+K(4S)碰撞能量转移

沈异凡 , 沈晓燕

量子电子学报 doi:10.3969/j.issn.1007-5461.2004.01.003

在Cs-K混合蒸气中,两步激发Cs原子到8D态,观察了Cs(8D)+K(4S)→Cs(5D)+K(4P)碰撞能量合并逆过程(REP,reverse energy pooling).应用双调制技术探测K(4P)原子发射的荧光,基态K原子密度用光学吸收方法测量.得到了REP速率系数,讨论了其它过程对速率系数的影响.

关键词: 光谱学 , 激发态原子 , 能量合并逆过程 , 速率系数

离子液体-中空纤维包容液膜回收Cs(Ⅰ)研究

陈姆妹 , 罗顺忠 , 钟文彬 , 马宗平

膜科学与技术 doi:10.3969/j.issn.1007-8924.2011.01.011

采用疏水性聚丙烯中空纤维作膜器、冠醚DB18C6作萃取剂、离子液体[Bmim][PF6]作稀释剂,构建了新型的离子液体-中空纤维封闭液膜体系,通过正交试验并以直接萃取方法为参照探索其用于回收Cs+性能.实验结果显示,该液膜体系可以实现从料液回收Cs+,且其中"经管程"操作模式的Cs回收效率优于"经壳程"模式.初步的条件实验显示该膜体系具有可调性,且适用于痕量Cs的分离回收.本实验成果为进一步加密实验条件、优化液膜体系性能奠定了基础,也为发展高效的cs(Ⅰ)分离回收方法提供一定参考.

关键词: 离子液体 , 中空纤维 , 封闭液膜 , Cs回收率

Enhancement of paramagnetic defects in yttria stabilized zirconia implanted by Cs ion irradiation

Journal of Alloys and Compounds

Single crystal samples of cubic zirconia stabilized by 9.5 mol% Y2O3 (YSZ) were implanted with 200 KeV Xe ions and 400 KeV Cs ions up to a dose of 5 x 10(16) ions/cm(2), then annealed at 200, 300, and 400 degrees C for 1 h isochronously, respectively. Electron paramagnetic resonance (EPR) and cross-sectional transmission electron microscopy were used to study defect structure and radiated damage mechanism. EPR spectra showed the trigonal signal with g(parallel to) = 1.989 and g(perpendicular to) = 1.869, which exhibited axial symmetry with (111) direction as symmetry axis composed of six-fold-coordinated Zr3+ sites. Peak-to-peak intensity (per unit volume) of Cs-ion irradiated YSZ is as about 150 time as that of Xe-ion irradiated YSZ. This indicated that the concentration of six-fold-coordinated Zr3+ defects produced by Cs-ion irradiation was far more than that of Xe-ion irradiated. The cross-sectional image of the irradiated samples showed that the Cs-ion irradiation in YSZ produced more defect clusters than Xe-ion irradiation. Annealing did not produce any change for EPR signals and indicated six-fold-coordinated Zr3+ defects was stable defect structure below 400 degrees C. (c) 2006 Elsevier B.V. All rights reserved.

关键词: yttria stabilized zirconia;heavy ion irradiation;TEM;electron;paramagnetic resonance;radiation-damage;single-crystals;phase-transition;cubic zirconia;electron traps;epr;centers;glasses;nanocrystals;resonance

Rydberg态Cs原子的Stark效应的实验研究

胡正发 , 柳晓军 , 龚顺生 , 詹明生 , 周士康

量子电子学报 doi:10.3969/j.issn.1007-5461.2000.04.003

利用原子束装置，采用双束波长为λl=852．1 nm和λ2=510 nm激光的两步激发， 实验研究了Cs Rydberg态原子在外加电场为0～600V／cm时的Stark扇形图，观察到在外电 场的作用下能级出现ι混合和n混合的现象．

关键词: 原子束 , Rydberg态原子 , Stark效应

活性炭纤维(ACF)吸附二硫化碳(CS2)的研究

谢遵园 , 李军平 , 赵宁 , 王峰 , 彭伟才 , 毛博阳 , 肖福魁 , 魏伟 , 孙予罕

新型炭材料

研究了商用活性炭纤维(Activated carbonf fiber-ACF)对二硫化碳(Carbon disulfide-CS2)的吸附件能,并与活性炭(Activated carbon-AC)、沸石吸附CS2的性能做了对比.重点考察了CS2浓度、吸附气流量、湿度和ACF含水量对CS2在ACF上吸附性能的影响.结果表明:相对于AC、沸石,ACF对CS2的吸附快、吸附率高,达46.5%;CS2浓度、吸附气流量增加,穿透点前移;湿度和含水量上升会明显降低ACF对CS2的吸附性能,当湿度升至65%时,吸附时间缩短28.6%;当含水量为质量分数45%时,穿透时间提前42.9%;当含水量增至质量分数60%时,CS2迅速穿透,ACF几乎不能再吸附CS2.

关键词: 二硫化碳 , 活性炭纤维 , 吸附 , 穿透曲线 , 穿透时间

Investigation of optical spectra and local structure for (CrF(6))(3-) cluster in Cs(2)NaAlF(6): Cr(3+) and Cs(2)NaGaF(6): Cr(3+) systems

Chemical Physics Letters

To investigate the local structure of the (CrF(6))(3) cluster for Cr(3+) in Cs(2)NaAlF(6) and Cs(2)NaGaF(6), the unified calculations of the whole EPR, optical spectra are made based on the 120 x 120 complete energy matrices which are constructed on the basis of the complete set of the basis vertical bar J, M(J)>. The results demonstrate that Cr(3+) substitute for the two inequivalent M(3+) sites rather than the Na(+) or Cs(+), which accord with the conclusion of several experiments. Simultaneously, the local structure parameters are determined and the relationship between the structure and the temperature has been discussed. (C) 2008 Elsevier B.V. All rights reserved.

关键词: electron-paramagnetic-resonance;symmetry-based equivalence;angular-overlap models;single-crystals;hexagonal elpasolites;cr3+;ions;spectroscopy;field;fluorides;state

PNIPA/CS智能水凝胶的辐射合成及性能研究?

杨阳 , 牛帅 , 李智慧 , 何素芹 , 刘文涛 , 朱诚身

功能材料 doi:10.3969/j.issn.1001-9731.2014.增刊(Ⅱ).005

选用具有优良温敏性单体 N-异丙基丙烯酰胺(NIPA)和具有良好生物相容性及生物可降解性的pH 敏感性天然高分子壳聚糖(CS)为基本原料,采用辐射法合成了PNIPA/CS智能水凝胶,用红外光谱分析了水凝胶的结构,并测定了水凝胶的溶胀动力学、退溶胀动力学和平衡溶胀率,研究了 CS 含量对凝胶性能的影响.结果表明,CS 分子上的 C3—O H 和/或C6—O H 和PNIPA发生了接枝反应,PNIPA/CS水凝胶的溶胀率随着CS含量的增大而逐渐减小.CS含量为20％的水凝胶其溶胀过程主要由链段的松弛来控制,该水凝胶的平均失水率约为94％,其较低温临界温度(LCST)约为37℃.

关键词: N-异丙基丙烯酰胺 , 壳聚糖 , 智能水凝胶 , 辐射 , 溶胀动力学 , 较低临界溶解温度