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Effect of copper impurity on the optical loss and Nd3+ nonradiative energy loss of Nd-doped phosphate laser glass徐永春,李顺光,胡丽丽,陈伟Shanghai Institute of Optics & Fine Mechanics, Chinese Academy... and nonradiative transition rate from the Nd3+ 4F3/2 state were determined and analyzed in detail. The optical loss coefficient per unit of Cu2+ (cm-1/ppmw) and the fluorescence decay rate (Hz/ppmw) caused......
Effect of copper impurity on the optical loss and Nd3+ nonradiative energy loss of Nd-doped phosphate laser glass徐永春,李顺光,胡丽丽,陈伟Shanghai Institute of Optics & Fine Mechanics, Chinese Academy... and nonradiative transition rate from the Nd3+ 4F3/2 state were determined and analyzed in detail. The optical loss coefficient per unit of Cu2+ (cm-1/ppmw) and the fluorescence decay rate (Hz/ppmw) caused......
of Applied Chemistry, Chinese Academy of Science, Changchun 130022, China;2.Department of Chemistry, Jilin University, Changchun 130026, China) Abstract:Extraction and interfacial kinetics of Nd3...-liquid extraction, which can be expressed as a quasi-first-order reaction. The effect of acidity in aqueous phase, concentrations of extractant, Nd3+ and Sm3+ on extraction rate were discussed......
:The extraction of Nd3+ and Sm3+, including the extraction and stripping capability as well as the separation effect of Nd3+ or Sm3+, from a sulfuric acid medium... coefficients of Nd3+ and Sm3+ in different acidities were also determined. A synergistic extractive effect was found when HDEHP and HEH/EHP were used as mixed extractants for Sm3+ or Nd3+. The chemical......
Investigation on energy transfer from Er3+ to Nd3+ in tellurite glass沈祥,聂秋华,徐铁峰,戴世勋,王训四摘 要:<正>A study of energy transfer of Er3+/Nd3+ codoped tellurite glasses was presented. By Nd3+ co-doping, both the Er3+ green emission corresponding to the Er3+: (4S3/2, 2H11/2)→4I15/2 transitions and the red emission corresponding to the Er3+: 4F9/2→4I15/2......
Green, orange, and red upconversion luminescence in Nd3+/Yb3+: Cs2NaGdCl6 powders under 785 nm laser excitation王殿元1,郭艳艳2,吴杏华1,张玉霞11. College of Science, Jiujiang University2. College of Mechanical and Materials Engineering, Jiujiang University摘 要:<正>Nd3+:Cs2NaGdCl6 and Nd3+, Yb3+:Cs2NaGdCl6 polycrystalline powder samples were prepared by Morss......
Analysis and direct calculation of the energy migration interaction parameter in high concentration Nd3+ doped YAG laser crystal王殿元1,郭艳艳21. College of Science, Jiujiang University2. College of Mechanical Engineering, Jiujiang University摘 要:The energy migration interaction parameter CDD in high concentration Nd3+ doped YAG laser crystal was estimated......
氟化物熔盐中含钕及钕-氧络合离子存在形式的研究 王兆文1,罗旭东1,崔建忠1,胡宪伟1,陈广华1,路贵民1 (1.东北大学,材料电磁过程研究教育部重点实验室,辽宁,沈阳,110004) 摘要:采用冰点降低法分别研究了以LiF为溶剂的稀LiF-NdF3熔盐中Nd-F离子团及LiF-NdF3-Li2CO3熔盐中Nd-O-F离子团的非氟离子的个数.结果表明,在以LiF为溶剂的稀LiF-NdF3熔盐中,Nd-F离子团中Nd3+的个数为2,这种离子团最可能的存在形式为Nd2F7-;而在以LiF为溶剂的稀LiF-NdF3-Li2CO3熔盐的含Nd3+,O2-离子团中,Nd3+与O2-的个数比为1,认为这种离子团最可能的存在形式为Nd2O2F42-.由此而得到的关于熔盐离子结构的信息对于理解工业实际应用的高NdF3含量的电解钕熔盐结构会有很大帮助. 关键词:LiF-NdF3(-Li2CO3)熔......
液压起重机过载保护系统的设计 胡均平, 刘兴农, 罗春雷, 朱桂华, 王凌辉 (中南大学 机电工程学院, 湖南 长沙, 410083) 摘要: 采用凸轮和杠杆机构作为控制装置, 以完全机械-液压方式, 不需电的转换, 研究设计了一种液压起重机角反馈自动调压系统. 系统利用凸轮机构作为吊臂角位移信号输入和转换的环节, 将输入量吊臂变幅角度α转换为与之相对应的系统压力p1所要求的先导式溢流阀导阀调压弹簧的预压缩量Xt2. 采用杠杆机构作为比例环节以实现线位移的放大以及相互作用力的匹配, 从而控制Xt2以实现吊机系统压力p1随吊臂变幅角度α的自动连续调节. 系统的核心部分是一个专用先导式......
阴极保护用铂钽复合材料的研究 王轶1,李银娥1,马光1 (1.西北有色金属研究院,陕西,西安,710016) 摘要:研究了阴极保护用铂钽复合材料的制备,表面相结构以及在海水与淡水中的电化学性能.实验结果表明,复合金属与基体金属结合良好,电化学性能接近纯铂,是一种理想的阳极材料. 关键词:金属材料; 阴极保护; 铂钽复合材料; 电化学性能; [全文内容正在添加中] ......