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at different temperatures. As seen from Fig. 9(a), two domains of oxide scales with different compositions are exhibited after exposure at 850 °C for 2 h. Aluminum oxide, chromium oxide and/or nickel-chromium oxide are identified in the external layer, while aluminum oxide becomes dominent in the internal layer. Similar oxide structures are obtained on that oxidized for 4 h (Fig. 9(b......
J. Cent. South Univ. Technol. (2009) 16: 0936-0941 DOI: 10.1007/s11771-009-0156-6 Technological conditions and kinetics of leaching copper from complex copper oxide ore SUN Xi-liang(孙锡良)1, 2...; Abstract: The kinetic behavior of leaching copper from low grade copper oxide ore was investigated. The effects of leaching temperature, H2SO4......
Improvement in varistor properties of CaCu3Ti4O12 ceramics by chromium additionEdson Cezar Grzebielucka1,Jo?o Frederico Haas Leandro Monteiro1,Eder Carlos Ferreira de Souza1,Christiane Philippini...">The effect of chromium addition on the structure and electrical properties of CaCu3Ti4O12 is studied.Compositions based on the formula CaCu3Ti4-xCrxO12-σ(x = 0, 0.025, 0.050 and 0.075 mol%) are prepared......
Up-Conversion Emission of Er3+ Ions in Yb3+ Sensitized Oxide Crystals Ruan Yongfeng1,Liu Jian1,Huang Boxian1,Lin Junyi1,Wang Jun1 (1.Department of Physics, School of Science, Tianjin University... + sensitized YVO4 crystal is more efficient than Yb3 + sensitized LiNbO3 crystal in the up-conversion of 550 nm of Er3+ emission, which is consistent with our observation. Key words:up-conversion; oxide......
J. Cent. South Univ. (2012) 19: 331-339 DOI: 10.1007/s11771-012-1009-2 Magnetic iron oxide nanoparticles carrying PTEN gene to reverse cisplatin-resistance of A549/CDDP cell lines MIN Ling-feng(闵凌峰... ? Central South University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: To evaluate the feasibility of using magnetic iron oxide nanoparticle as wild PTEN gene carrier for transfection......
Influence of additive element on surface oxide film of A356 alloy OUYANG Zhi-ying(欧阳志英), LIANG Hong-yu(梁红玉), MAO Xie-min(毛协民), HONG Mei(红 梅) School of Material Science and Engineering, Shanghai University, Shanghai 200072, China Received 28 July 2006; accepted 15 September 2006 Abstract: The influences of RE-modification and Sr-modification on the hydrogen content and surface oxide......
Syntheses and cofluorescence of complexes of Eu(Ⅲ)/Y(Ⅲ) with terephthalic acid, 2-thenoyltrifluoroacetone and trioctylphosphine oxide ZHAO Xue-hui(赵学辉)1, 2, HUANG Ke-long(黄可龙)1, LIU Su-qin(刘素琴)1...(Ⅲ) complexes of terephthalic acid(TPA) with 2-thenoyltrifluoroacetone(HTTA) and trioctylphosphine oxide(TPPO) were synthesized. Compositions of these complexes are revealed to be Eu2(1-x)Y2x(TPA)(TTA)4- (TPPO......
alloy in molten Na2SO4+NaCl. The relevant corrosion mechanism was discussed. Key words: Ti-48Al-8Cr-2Ag alloy; magnetron sputter; nanocrystallization; hot corrosion; oxide scale oxide of Cr. Beneath the mixed layer, sulfide exists......
J. Cent. South Univ. Technol. (2008) 15: 679-683 DOI: 10.1007/s11771-008-0126-4 Leaching kinetics of low grade zinc oxide ore in NH3-NH4Cl-H2O system WANG Rui-xiang(王瑞祥)1, 2, TANG Mo-tang(唐谟堂)1...; Abstract: The leaching kinetics of low grade zinc oxide ore in NH3-NH4Cl-H2O system......
EFFECT OF THE EXISTING STATES OF CHROMIUM ION ON THE COLOR CHARACTERISTICS OF DOPED β-C2S冯修吉,阎培玉摘 要:<正> According to the theory of crystal field, theexisting state of chromium ions in β-C2S was studiedwith optical spectra and EPR. The energy levels ofchromium ions were calculated. Chromium ions existin form of Cr4+ and Cr5+ coordinated......
