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, which is computed from the measured absorbance for known concentrations N0 of the Er in the glass [13]. Fig. 2 Absorption spectra of Er3+-doped tellurite glasses According to the Judd-Ofelt theory.... Spectroscopic properties of Er3+-doped Na2O–Sb2O3–B2O3– SiO2 glasses [J]. Journal of Non-Crystalline Solids, 2008, 354: 1981-1985. 掺铒碲酸盐的热稳定性和Judd-Ofelt理论分析 任 芳,梅宇钊,高 超,朱立刚,卢安贤 中南大学 材料科学与工程学......
J. Cent. South Univ. (2018) 25: 2472-2495 DOI: https://doi.org/10.1007/s11771-018-3930-5 Evolution of diagenetic fluid of ultra-deep Cretaceous Bashijiqike Formation in Kuqa depression LI Ling(李玲)1..., PetroChina Tarim Oilfield Company, Korla 841000, China Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract: Diagenetic fluid types of the Cretaceous......
of Science and Technology Beijing摘 要:In this study, silicone-oil-basedγ-Fe2O3 magnetic fluid was successfully prepared by thermal oxidizing of Fe304 magnetic... was as surfactant for preparingγ-Fe2O3 magnetic fluid. It is found that the Fe304 nanoparticles surrounded by oleate ligands are not damaged during the thermal oxidizing. The shape of y-Fe2O3 magnetic......
. Influence of the rare earth content on the electrochemical behaviour of Al-Mg-Er alloys[J]. Intermetallics, 2003, 11(5): 435-441. [2] 杨军军, 聂祚仁, 金头男. 稀土铒在Al-Zn-Mg合金中的存在形式与细化机理[J]. 中国有色金属学报, 2004, 14...文章编号:1004-0609(2009)09-1580-07 Al-Er和Si-Er二元合金的热力学性质 孙顺平,易丹青,陈 莹,吴春萍 (中南大学 材料科学与工程学院,长沙 410083) 摘 要:以Miedema混合焓模型为基础,计算Al-Er和Si-Er二元合金的部分热力学函数,如混合焓?H,过剩熵SE以及过剩吉布斯自由能GE以及各组元的活度.结合Al-Er......
J. Cent. South Univ. Technol. (2010) 17: 1336-1343 DOI: 10.1007/s11771-010-0639-5 Performance of viscous fluid dampers coupling adjacent inelastic structures under near-fault earthquakes GE Dong... Heidelberg 2010 Abstract: The behavior of viscous fluid damper applied in coupling structures subjected to near-fault earthquake was studied. The structural nonlinearity was characterized by Bouc-Wen model......
J. Cent. South Univ. (2016) 23: 3256-3261 DOI: 10.1007/s11771-016-3391-7 Coupled effects of stress damage and drilling fluid on strength of hard brittle shale WANG Wei(汪伟), DENG Jin-gen(邓金根), YU Bao... and concentration, which leads to stress damage phenomenon around the borehole. Consequently, drilling fluid will invade into formation along the tiny cracks induced by stress damage, and then weaken the strength......
Zn release from fluid inclusions in a natural sphaleriteShu-ming Wen1,Jian Liu1,Bo Li2,Run-sheng Han2,Yi Zhang1,Jiu-shuai Deng11. Faculty of Land Resource Engineering,Kunming University of Science..., size, and compositions of fluid inclusions in a natural sphalerite were investigated and the total concentration of Zn released from the fluid inclusions was measured. To compare the total......
铒对氢氧化镍电极高温充放电性能的影响 尉海军1,简旭宇1,成艳1,王忠1,谢守韫1,方庆1,朱磊1 (1.北京有色金属研究总院能源材料与技术研究所,北京,100088) 摘要:覆Co(Ⅲ)球镍具有优良的电化学性能,是镍氢动力电池较理想的活性材料,然而其高温性能仍待提高.本文研究了通过不同方式在覆Co(Ⅲ)球镍中添加铒改善镍电极的高温性能.结果表明,采用机械混合在球镍中添加1%(原子分数)Er2O3以及表面化学沉积方式在球镍表面包覆1%Er(OH)3的电极70℃时1C充/放电效率分别比无添加的电极提高11.7%和12.6%.循环伏安测试表明,铒的添加提高了镍电极在高温下的析氧过电位,明显提高了电极在高温环境下的充电效率. 关键词:镍氢电池; 氢氧化镍电极; 稀土添加剂; 表面包覆; 高温性能; [全文内容正在添加中] ......
新型掺铒铋酸盐玻璃上转换发光研究 胡丽丽1,徐时清1,张丽艳1,陈宝玉1,孙洪涛1,戴世勋1 (1.中国科学院上海光学精密机械研究所,上海,201800) 摘要:制备了新型掺Er3+铋铅锶玻璃,研究了玻璃的吸收光谱和上转换光谱性质,应用Judd-Ofelt理论计算了铋铅锶玻璃的3个强度参量Ωt(t=2,4,6),分别为Ω2=3.27×10-20 cm2,Ω4=1.15×10-20cm2,Ω6=0.38×10-20 cm2.计算了Er3+离子的振子强度,自发辐射跃迁几率,荧光分支比和辐射寿命等光谱参数.研究了上转换发光强度随泵浦激光功率的变化,上转换荧光525,546和657 nm曲线的斜率分别为1.86,1.88和1.85,表明红,绿光发射均为双光子吸收过程. 关键词:无机非金属材料; 铋铅锶玻璃; Er3+离子; 光谱性质; Judd-Ofelt理论; 稀土; [全文内容正......
掺铒Bi2O3-GeO2-Ga2O3-Na2O玻璃中激发态吸收的抑制 王俊1,周亚训2,聂秋华1,徐铁峰1,戴世勋1 (1.宁波大学信息科学与工程学院,宁波,315211;2.重庆大学光电技术及系统教育部重点实验室,重庆400044;3.宁波大学信息科学与工程学院,宁波315211) 摘要:对应用于1.55μm波段宽带放大的掺Er3+:Bi2O3-GeO2-Ga2O3-Na2O(玻璃中激发态吸收的抑制进行了研究.为此,在该玻璃中分别引入了Ce3+离子和B2O3组分.研究表明,随着玻璃中Ce2O3的掺杂或B2O3组分的引入, Er3+4:I11/2能级与Ce3+2:F5/2能级间的能量传递或Er3+4:I11/2→4I13/2能级间多声子弛豫速率相应提高, Er3+离子4I11/2能级荧光寿命显著减小,激发态吸收得到有效抑制.同时,实验发现, Ce2O3的掺杂进一步提高了Er3+离子......
