|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Ethyl carbamate levels in wine and spirits from markets in Hebei Province, China显示文摘 | Y.P. Liu B. Dong Z.S. Qin N.J. Yang Y. Lu L.X. Yang F.Q. Chang Y.N. Wu | 2011 | Food Additives and Contaminants: Part B2011，，1： | 1 |
| 2 | INVESTIGATION OF BONDING IN NANO-SiO_(2) BY Si L_(2,3) X-RAY ABSORPTION NEAR-EDGE STRUCTURE SPECTROSCOPY显示文摘The Si L2,3 X-ray absorption near-edge structure (XANES) can be used to probe the local structure around Si and derive electronic information of the unoccupied s- and d-like partial density of states in nano-size SiO2. We present Si L2,3-edge for three different size silicates acquired by total electron yield (TEY) at the photoemission station of Beijing Synchrotron Radiation Facility (BSRF). The Si L2,3-edge spectra are interpreted based on ab initio full multiple-scattering (MS) calculation. The Si L2,3-edge of nano-size materials has XANES similar to that of a-quartz. The similarities between the Si L2,3-edge shapes attest to a common molecular-orbital picture of their Si-O bonding and the same coordination state. However, a considerable broadening of Si L2,3-edge XANES spectra as decrease of particle size is also an indicative of polyhedral distortions. | Z.Y. Wu, K. Ibrahim, G. Li, J. Zhang, F.Q. Liu, M.I Abbas, R. Hu, H.J. Qian and F.Q. Tang ( Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039, China) ( Laboratori Nazionali di Frascat | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，6： | 1 |
| 3 | Foundry technology and its applications of ductile iron castings produced by water-cooled copper alloy Mold显示文摘The high efficiency mechanized foundry technology of castings produced by using water-cooled copper alloy permanent mold has been systematically studied. Through the researching a Cu-Cr-Mg alloy with high conductivity and good combined mechanical properties used for making permanent mold was developed, and the basic design principles of the water-cooled permanent mold along with the control-range of relevant foundry processing parameters were also established. A cast production line equipped with water-cooled copper alloy mold was designed and fabricated for production of ductile iron automobile gear castings, This production line can consistently make automobile gear castJngs Jn QT500-15 and QT600-5 (Chinese Standard) grades of ductile iron with up to 95% casting success rate. | ~*X. B. Qi~1, J. Tang~1, Z.A. Liu~1, D.X. Piao~1, F.Q. Yin~2, S.C. Yang~2 (1. Shenyang Research Institute of Foundry, Shenyang 110022, Liaoning, P. R. China 2. Dongfeng Chaoyang Diesel Engine Co. Ltd, Chaoyang 112000, Liaoning, P. R. China) | 2004 | China Foundry2004，1，S1： | 1 |
| 4 | Recrystallization behavior of cold-rolled Zr 702显示文摘 | M.H. Li M. Ma W.C. Liu F.Q. Yang | 2013 | 2013 (1-3)2013，，1： | 1 |
| 5 | 查看详情显示文摘 | Song G.B Liu F.S Cao Y.G Peng T.J. Dong F.Q. Wan P | | 0，，： | 1 |
| 6 | STRUCTURAL DETERMINATION OF TITANIUM-OXIDE NANOPARTICLES BY X-RAY ABSORPTION SPECTROSCOPY显示文摘As a potential application of titanium-oxide nanoparticles, it is extremely importantto investigate a detailed picture of the surface and interior structural properties ofnanocrystalline materials, such as rutile and anatase with diameters 7.0 and 4.5nm,respectively. X-ray absorption spectroscopy has been used to identify the local Ti envi-ronment and related electronic structure. We combine the experimental results at theTi edge in both bulk and nano-crystals to determine the lattice distortion in terms ofdifferently characteristic preedge features and the variation in the multiple-scatteringregion of X-ray absorption near-edge structure (XANES) spectra. The relationshipbetween the transition peaks and the surface-to volume ratio is also discussed. | Z.Y. Wu J. Zhang K. Ibrahim M.I. Abbas G. Li Y. Tao T.D. Hu F.Q. Liu H.J. Qian Y.N. Xie Q.H. Zhang L. Gao Z.Z. Chen | 2002 | Acta Metallurgica Sinica(English Letters)2002，15，1： | 1 |
| 7 | 查看详情显示文摘 | Chen B Luo Y.H Liang H Xu J. Guo F.Q. Zhang Y.Z. Lin A.B. Liu X | | 0，，： | 1 |
| 8 | INVESTIGATION ON THE VALENCE STATE OF Ce ATOMIN BULK AND NANOCRYSTAL CeO_2 BY X-RAY ABSORPTION ANDPHOTOEMISSION显示文摘Valence band photoemission spectra (PES) for both bulk and nanocrystal CeO2 have been measured on and off resonance of Ce 4d-4f absorption edge. The PES show that the bulk and nanocrystal CeO2 of diameter ranging from 8nm to 50nm exhibit a peak near Fermi edge with binding energy of about 1.8eV. The 1.8eV peak shows a strong dependence on excitation energy, although it looks like the contribution of Ce3+ ion following the data reported in literatures. However, according to the results of resonance photoemission and X-ray absorption spectra at 1s edge, this electronic structure may be associated to the intermediate state charge transfer effects. | K. Ibrahim, Z.Y. Wu, J. Zhang, M.I. Abbas, F.Q. Liu and H.J. Qian (Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, The Chinese Academy of Sciences, P.O. Box 918, Beijing 100039, China) | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，6： | 0 |
| 9 | RESONANT PHOTOEMISSION OF BULK CeO_(2) AND NANO-CeO_(2) FILMS显示文摘Photoemission behaviors of nano-CeO2 films with particle sizes ranging from 8nm to 50nm and bulk CeO2 in Ce 4d-4f absorption region have been investigated. Resonant enhancements of Ce 4f valance band and Ce 5p bands for nano film and bulk material have been observed. The variation of electron density,, of states in valance bands of nano and bulk structures of CeO2 is discussed in terms of Ce 4d-4f resonance. | M.I. Abbas, K. Ibrahim, Z.Y. Wu, J. Zhang, F.Q. Liu and H.J. Qian (Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, The Chinese Academy of Sciences, P.O. Box 918, Beijing 100039, China) | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员