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Investigation on Raman spectra and thermal properties of LuVO4 and Nd:LuVO4 crystals徐民,于浩海,张怀金,许心光,王继扬State Key Laboratory of Crystal Materials,Shandong University摘 要:Lattice vibration modes of LuVO4 and Nd:LuVO4 crystals were calculated by using space group theory,and polarized Raman spectra were recorded with four different geometrical scattering......
Research of Tb∶Mo∶PbWO4 Crystal Structure by Raman Spectra徐衍岭,杨同勇,王锐,杨春晖,刘维海,石连升摘 要:The structure of Tb∶Mo∶PbWO4 crystals was investigated by Raman spectra and the results showed that the spectra were varied differently by doping dopants in different ranges of shift. Rotation-vibration, curving-vibration and non-symmetrical stretching-vibration had been......
高煤级煤-隐晶质石墨的Raman光谱表征及结构演化李焕同1,2,王楠1,朱志蓉1,范晶晶3,张卫国1,21. 西安科技大学地质与环境学院2. 陕西省煤炭绿色开发地质保障重点实验室3. 中国石油勘探开发研究院摘 要:拉曼光谱能够反映碳材料结构的有序程度和结构缺陷,可用来表征高煤级煤一隐晶质石墨演化过程中结构变化...无烟煤阶段,Rmax> 6.5%,P(D1-G)<235 cm-1,P(S2-S4)>525 cm-1以及半峰宽比显著下降,La/Lc迅速降低,为芳构化,芳环缩合作用增强向芳环叠片拼叠转变;半石墨至石墨演化阶段,P(D1-G),ID1/IG与AD1/AG显著降低,La,Lc迅速增加.以d002为标度能较好地反映煤结构在不同演化阶段的Raman光谱特征.关键词:高煤级......
by employing scanning electron microscopy (SEM), atomic force microscopy(AFM), nano-indentation measurements, X-ray photoelectron spectroscopy (XPS), Raman scattering and Fourier transform infrared (FTIR... was 0.25. The nanohardness was measured to be in the range of 11.7-20.8GPa depending on the N/C ratios. The XPS N 1s spectra showed the existence of both N-C sp2 and N-C sp3 bonds in films. Raman and FTIR......
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when the solutions are prepared by dissolving sodium hydroxide and aluminum hydroxide. In addition, the IR and Raman spectra of sodium aluminate solutions with high alkali concentration and high...; Raman spectrum; aluminate ion ......
铝酸钠溶液中为铝酸根离子的基本形态.随着溶液浓度的增加,出现了二聚体,且两种离子数量随溶液苛碱浓度的增加而上升. 图1 不同苛碱浓度铝酸钠溶液拉曼光谱 Fig.1 Raman spectra of sodium aluminate solution with different alkali concentrations 2.2 乙酸盐对溶液结构的影响 不同...曼解谱. 图2 不同乙酸根浓度铝酸钠溶液的拉曼光谱 Fig. 2 Raman spectra of sodium aluminate solution with different acetate concentrations 对图2所示的拉曼光谱进行拟合,在后续的定量分析中,以离子团的信号最强峰作为比较,将解谱所得的铝酸根离子团振动所对应的拉曼最强峰各参数列于表1.其中......
Characterization of CuO Species and Thermal Solid-Solid Interaction in CuO/CeO2-Al2O3 Catalyst by In-Situ XRD, Raman Spectroscopy and TPR Luo Mengfei1,He Mai1,Fang Ping1 (1.Zhejiang Key Laboratory... in CuO/CeO2-Al2O3 catalyst prepared by an impregnation method were characterized by in-situ XRD, Raman spectroscopy and H2-TPR techniques.For the catalyst calcined at 300 ℃, two kinds of CuO species......
烧绿石型富氧相Ce2Zr2O8的Rietveld结构精修及其Raman光谱研究谢华1,2,王烈林1,罗德礼21. 西南科技大学核废物与环境安全国防重点学科实验室2. 表面物理与化学重点实验室摘 要:采用石墨还原法成功制备了烧绿石型富氧相Ce2Zr2O8,选用缺氧型烧绿石Nd2Zr2O7作为Ce2Zr2O8相前驱体CeZrO3.5的替代物与之进行结构对比分析.实验结果表明:Ce2Zr2O8相中富余氧主要占据前驱体中的氧空位,且氧离子扩散不会破坏原本有序排列的阳离子(Ce/Zr)亚点阵;同时,Ce2Zr2O8相中Zr-O配位体由前驱体中共顶联接的八面体转变为共棱联接的立方体,其反相畴界密度和振动光谱谱带亦较前驱体明显提高.以上结果说明Ce2Zr2O8相结构处于亚稳态,该结构特征有利于氧离子的快速吸附或释放......
INFRARED AND RAMAN SPECTRA STUDIES OF THE GLASS IN THE SYSTEM OF LiCl-Li2OP2O5崔万秋,严健,张伟,徐知三摘 要:<正> Infrared and Roman Spectra of two kinds of glass systems of Li2 O-P2 O5 and LiCl-Li2O-P2O5 were studied and the influence of LiCl on the glass structure was discussed. The results show that in the system of Li2O-P2O5, Licl can not only play a dresser......
