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动模E2g的散射峰(G峰).G峰代表石墨的散射峰,而C/C复合材料的拉曼光谱中还在1 332 cm-1处出现散射峰(D峰),D峰由不存在于六方石墨晶格内的振动产生.根据D峰强度ID和G峰强度IG比值R(R=ID/IG)可判断C/C复合材料表面结构有序程度[8],即1/R与石墨微晶La或无缺陷区域成 正比. 表1 炭纤维经浓硝酸(66%)处理后表面元素含量的变化 Table......
properties of ceramics based on CaTiO3-LnMO3 system (Ln–La, Nd; M–Al, Ga) [J]. J Eur Ceram Soc, 2003, 23 (14): 2443-2448. [6] Zhang Q L, Yang H, Zou J L, Wang H P. Sintering and microwave dielectric......
-C基材料为负极的"Nexelion"锂离子电池成功上市,标志着Sn基材料商品化的开始,迅速引起锂电行业的广泛关注,Sn-Co体系成为Sn基材料研究的热点,主要集中在以各种方法制备Sn-Co合金,而对Sn-Co体系中添加更多元素的报道较少. WANG等[7]在Sn-Co合金中添加La制备了LaCo5-xSnx(x=3.0~4.5)合金,发现LaCoSn4具有较好的循环性能,40周循环后容量几乎未衰减... materials for Li-ion batteries[J]. Chem Industry Eng Progress, 2007, 27(12): 1894-1896. [7] Wang G, Lu Z W, Gao X P, Liu X J, Wang J Q. Electrochemical performance of La-Co-Sn alloys as anode materials......
-earth oxysulfides LnCuOS (Ln=La-Eu), is an indirect gap semiconductor with band gap of about 1.1 eV in experimental investigation [7] or about 0.48 eV in theoretical calculation [9]. KUSAINOVA et al [10...): 7719-1123. [3] Kamihara Y, Watanabe T, Hirano M, Hosono H. Iron-based layered superconductor La[O1-xFx]FeAs (x=0.05-0.12) with Tc=26 K [J]. J Am Chem Soc, 2008, 130: 3296-3297. [4] Wen H H......
scrap by compound-separation method [J]. Journal of the Japan Institute of Metals, 2005, 69(2): 198-201. [8] LA FONTAINE A, KEAST V J. Compositional distributions in classical and lead-free brasses [J......
heat pump operation under variable flow [J]. Journal of Central South University of Technology, 2011, 18(4): 1272-1277. [21] GERARD B, PIJAUDIER CABOT G, LA BORDERIE C. Coupled diffusion-damage modeling......
and Compounds, 2008, 461: 598-603. [20] CHEN Yih-Chien, CHANG Yun-Hung. Dielectric properties of B2O3-doped La(Mg0.5Sn0.5)O3 ceramics at microwave frequencies [J]. Journal of Alloys and Compounds, 2009......
, structure and properties of bismuth titanate ceramics [J]. Science of Sintering, 2005, 37(3): 199-216. [4] PAVLOVIC NIKOLINA, SRDIC VLADIMIR V. Synthesis and structural characterization of Ce-doped.... Biocoordination chemistry of bismuth: Recent advances [J]. Coordination Chemistry Reviews, 2007, 25(17-20): 2354-2366 [13] JIANG Zhi-yi, ZHANG Lei, CAI Li-li, XIA Chang-rong. Bismuth oxide-coated (La,Sr)MnO3......
(2): 61-64. [13] PILONE D, FELLI F, BERNABAI U. Production of aluminum coated ferritic stainless steel by co-rolling and annealing [J]. La Metallurgia Italiana, 2006, 98(7/8): 55-59. [14] 吴铭方, 司乃潮, 陈......
vertex and bisector geometric model for triangular road sign detection[C]//2009 Workshop on Applications of Computer Vision. Piscataway, USA: IEEE, 2009: 1-7. [5] de la Escalera A, Moreno L E, Salichs M......