中国科学院机构知识库网格系统: 检索

Oxidation precursor dependence of atomic layer deposited al2o3 films in a-si:h(i)/al2o3 surface passivation stacks 期刊论文 iSwitch采集
Nanoscale research letters, 2015, 卷号: 10, 期号: 1
作者: Xiang,Yuren; Zhou,Chunlan; Jia,Endong; Wang,Wenjing

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Atomic layer deposition Al2o3 A-si:h(i)/al2o3 stack Interface trap density

Cavitation erosion resistance of microarc oxidation coating on aluminium alloy 期刊论文 OAI收割
Applied Surface Science, 2013, 卷号: 280, 页码: 287-296
作者: Cheng, Feng; Jiang, Shuyun; Liang J(梁军)

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Microarc oxidation coating a-Al2O3 Cavitation erosion resistance Pits

Structure and magnetic properties of (Al, Co) Co-doped ZnO thin films (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Materials Science and Nanotechnology, ICMSN 2012, November 16, 2012 - November 18, 2012, Guangzhou, China
Cao P.; Bai Y.

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In this study Zn0.99Co0.01Al0.015O thin film has been prepared by sol-gel method. The structural and magnetic properties of the sample were investigated. X-ray diffraction spectroscopy analyses indicate that the Co and Al codoping can not disturb the structure of ZnO. No additional peaks are observed in the Zn0.99Co0.01Al xO and Al3+ and Co2+ substitute for Zn 2+ without changing the wurtzite structure. The resistance measurements confirm that Al ions increase the free carriers concentration. Based on the above experiments we think the ferromagnetic behavior of the sample could not originate from Co nanoclusters. The presence of free carriers and localized d spins is a prerequisite for the appearance of ferromagnetism. As the result the carriers generated by Al doping is considered a main factor to induce the ferromagnetic phenomenon. (2013) Trans Tech Publications Switzerland.

Control of N/N2 species ratio in NO plasma for p-type doping of ZnO (EI CONFERENCE) 会议论文 OAI收割
作者: Chen X.; Liu L.; Liu L.; Li B.; Li B.

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Nitrogen-doped ZnO thin films were grown on c-plane sapphire (Al 2O3) substrates via plasma-assisted molecular beam epitaxy using plasma activated nitric oxide (NO) as the oxygen source and dopant. X-ray diffraction measurements indicate that a small NO flux benefits the crystal quality of the thin films. Hall effect measurements indicate that the electron density of the ZnO films decreases gradually with decreasing NO flux and the conduction reverses to p-type at a certain flux. Optical emission spectra indicate that the N atom content in the NO plasma increases with decreasing NO flux and the origin of this is discussed. X-ray photoelectron spectroscopy measurements demonstrate that the number of N atom occupied O sites in the ZnO lattice increases correspondingly. 2011 American Institute of Physics.

Thermal analysis on supersonic ellipsoidal dome (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Multimedia Technology, ICMT 2011, July 26, 2011 - July 28, 2011, Hangzhou, China
Jiang Z.; Wei Q.; Jia H.

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Studied the transient thermal transfer analysis method due to a kind of supersonic ellipsoidal dome which is a conformal dome. Illuminated the principle of transient thermal transfer analysis. Accomplished the transient thermal analysis based on the model of ellipsoidal dome and studied the influence about the different material and the different velocity. Considered three materials consist of MgF2 Al2O3 and ZnS and meanwhile the velocity was Mach2.5 and the time consists of 10s 20s and 60s. The temperature initial loads were from FLUENT thermal simulation. The thermal conduction analysis and the thermal convection analysis were finished in software ANSYS in which the entire transient thermal analysis consists of modeling meshing element calculating and getting the results. The different temperature distributions based on varied time were gotten about the different materials. The results from analysis showed the temperature distribution of the structure of ellipsoidal dome which could help the following coupled thermal-structure analysis. 2011 IEEE.

Thermal-structure analysis of supersonic dome based on three materials (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Jiang Z.; Ai X.; Wei Q.; Liu B.; Jia H.

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To a supersonic missile a seeker could enhance the aerodynamic ability due to decrease the resistance in flying. At the same time the primary function of a seeker has been considered as the most important equipment for a missile due to the importance for cueing of targets and tracking for the final approach. However the dome of a seeker which is made up of glass has poor mechanical performance. Especially in the higher altitude for a dome in which the aerothermal and pressure loads could destroy the structure easily it is necessary to do the thermal-structure coupled analysis due to varied materials. In the paper to take the spherical dome of a seeker as a example the analysis has been completed according to the varied materials consist of MgF2 Al2O3 and ZnS. The temperature loads and the pressure loads derived from the results of fluent analysis has been forced on the surface of dome which simulates the actual Mach 2.5 in flying. According to the results of coupled analysis the SEQV stress of the dome radium 80mm based on three materials had reached to 31MPa which shows that the strength is sufficient for Mach 2.5 and offered the warranty to design the attaching to missile for the dome. At the same time the results required the flexible mounting for the dome due to the displacements results which the crystal material couldn't accept. 2011 IEEE.

Optical characteristic of ion beam sputter deposited aluminum thin films (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Optoelectronic System Design, Manufacturing, and Testings, September 9, 2007 - September 12, 2007, Beijing, China
作者: Yang H.; Liu L.; Liu L.

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Aluminum is a typical active metal very easy to oxidize. An oxide surface layer of about 2-6nm quickly formed in air which adds difficulty to the optical constants determination. An ex-situ method is used to determine the optical constants of aluminum thin films. First Second Third alumina (Al2O3) thin film is deposited by ion beam sputter deposition. The optical constants and thickness are determined by spectral ellipsoemtry (SE). The thickness is verified by grazing x-ray reflection (GXRR) fitting method Al thin film with an Al2O3 cap layer on top is deposited. This cap layer is of the same deposition condition with the first step. By fitting the GXRR spectra based on the acquired structure information the structure information (the thickness of the aluminum and the cap layer the ellipsometric spectra are fitted. The optical constants of the aluminum layer are extracted with the aid of the Drude model. Finally surface roughness and the diffusion between Al-Al2O 3) is obtained an induced transmission filter (ITF) is designed and deposited.

热生长Al_2O_3膜型M-A1纳米复合镀层及制备方法和应用 成果 OAI收割
2008
中国科学院金属研究所

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M-A1纳米复合镀层热生长Al2O3膜制备

CrAlN涂层的制备及其高温腐蚀行为研究 学位论文 OAI收割
博士, 金属研究所: 中国科学院金属研究所, 2007
李天鹏

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CrAlN涂层高温氧化热腐蚀 a-Al2O3氧化膜 Cr2O3氧化膜

Synthesis of lutetium aluminum garnet powders by nitrate-citrate sol-gel combustion process 期刊论文 iSwitch采集
Ceramics international, 2007, 卷号: 33, 期号: 6, 页码: 1141-1143
作者: Li, Huili; Liu, Xuejian; Huang, Liping

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A. sol-gel processes Powders Lu3al5o12