中国科学院机构知识库网格系统: 检索

Design of ZnS nanospheres antireflective structure for mid and far infrared applications 期刊论文 OAI收割
CERAMICS INTERNATIONAL, 2024, 卷号: 50
作者: Xu, Shao Hui; Hu, Xu Ran; Fei, Guang Tao; Huang, Jian Yong; Xia, Kai

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收藏 | 浏览/下载：3/0 | 提交时间：2024/11/20

Antireflection film ZnS nanospheres Mid and far infrared Reflectance Weather resistance

Research on the spin-Hamiltonian parameters and defect structure for Ni+ ion in CdS 期刊论文 OAI收割
Physica B-Condensed Matter, 2013, 卷号: 412, 页码: 1-3
W. C. Zheng; L. He; W. Li; H. G. Liu

收藏 | 浏览/下载：15/0 | 提交时间：2013/12/24

Electron paramagnetic resonance Crystal -and ligand-field theory Complete diagonalization method Defect structure CdS Ni+ atomic screening constants crystal-field paramagnetic-resonance spray-pyrolysis scf functions zns semiconductors spectra sites

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.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

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.

收藏 | 浏览/下载：26/0 | 提交时间：2013/03/25

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.

Fabrication and photoluminescence of ZnS: Mn2+ nanowires/ZnO quantum dots/SiO2 heterostructure (EI CONFERENCE) 会议论文 OAI收割
作者: Yang L.; Wang D.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

In this paper we demonstrated the encapsulation of ZnS: Mn2+ nanowires (NWs) and ZnO quantum dots (QDs) with a layer of mesoporous SiO 2 shell for the purpose of integrating dual emission property into one common nanostructure. The average diameter of ZnS: Mn2+ NWs ZnO QDs and ZnS: Mn2+ / ZnO@SiO2 heterostructure was about 10 nm 6 nm and 22 nm respectively. Within ZnS: Mn2+ / ZnO@SiO 2 nanocomposites the intensity of the yellow-orange emission contributed by ZnS: Mn2+ NWs and the UV emission contributed by ZnO QDs was three and ten times higher than their individual components respectively. The fluorescence intensity ratio of the dual emission can be tuned by adjusting the hydrolysis time of tetraethyl orthosilicate. The peak energy of the yellow-orange and UV emission showed blueshift and redshift as increasing the temperature respectively. The anomalous enhancement of the integrated intensity for the UV emission with the temperature indicated that the high surface state density existing in ZnO QDs can overrun the influence of temperature quenching and even alter the photoluminescent properties. 2010 American Institute of Physics.

Theoretical study of spin singlets contributions to zero-field splitting and local lattice structure of Cr(2+) in CdGa(2)S(4) 期刊论文 OAI收割
Journal of Alloys and Compounds, 2009, 卷号: 484, 期号: 1-2, 页码: 472-476
Y. Li; X. Y. Kuang; Z. Li; M. L. Gao

收藏 | 浏览/下载：25/0 | 提交时间：2012/04/13

Crystal structure and symmetry Crystal and ligand fields EPR luminescence quantum efficiency nanocrystalline znsmn2+ triplet contribution tetragonal sites zns ions epr nanoparticles absorption spectra

Temperature-enhanced ultraviolet emission in ZnO thin film (EI CONFERENCE) 会议论文 OAI收割
Zhang Y. J.; Xu C. S.; Liu Y. C.; Liu Y. X.; Wang G. R.; Fan X. W.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

We have studied the structural and optical properties of ZnO thin films prepared by thermal oxidation of ZnS films deposited by plasma assisted electron-beam evaporation on Si(1 0 0) substrates. The transformation from zinc blende ZnS to hexagonal wurtzite ZnO is confirmed by Raman and X-ray diffraction (XRD) measurement. For the sample thermally oxidized at 600 C for 2 h a novel UV emission peak Ix located at 3.22 eV (385 nm) has been observed. The temperature-dependent photoluminescence spectra show that the integrated intensity of Ix increases exponentially with increasing temperatures within the measuring temperature range from 80 to 300 K but the peak position remains nearly constant. We explain this behavior in terms of electron tunneling into the radiative recombination centers.

Using one-dimensional nonlinear photonic crystal for dynamical addressing optical interconnection (EI CONFERENCE) 会议论文 OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者: Li C.; Wang W.; Wang W.; Li C.; Li C.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

Optical interconnection is the key technique of high-speed optical information process and optical communication. A lot of approaches for optical interconnection have been proposed since Goodman in Stanford University firstly proposed the optical interconnection for very large scale integrated circuits technology. A dynamical addressing device for optical interconnection was designed and fabricated in this paper. This optical device is based on one-dimensional nonlinear photonic crystal made on the planar waveguide. The nonlinear materials ZnS and ZnSe which have large nonlinear refractive index coefficients were alternately deposited on the waveguide to form one-dimensional photonic crystal. The Bragg condition is changed when the input power of the control light increased due to the nonlinear characters of the materials thus the reflective angle of the signal light can be changed with the input power change of the control light. In our experiment when increasing the power density of control light from 0 to 2.60X105W/cm 2 the angle of the signal beam can be changed about 20. The interconnection characteristics were investigated in theory and in experiment. The testing data agree well with theoretical predictions. This kind of devices is promising to use in the all-optical interconnection optical information processing and optical communication.

EPR theoretical study of local lattice structure in ZnS : Cr2+ system 期刊论文 OAI收割
Solid State Communications, 2005, 卷号: 136, 期号: 7, 页码: 395-399
X. M. Tan; X. Y. Kuang; K. W. Zhou

收藏 | 浏览/下载：10/0 | 提交时间：2012/04/14

impurities in semiconductors crystal structure and symmetry crystal and ligand fields excitation-levels zns compound

EPR parameters of the trigonal Fe-Ga(+)-S-P pair defect in n-type GaP codoped with iron and sulphur 期刊论文 OAI收割
Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences, 2005, 卷号: 60, 期号: 10, 页码: 753-755
X. X. Wu; W. C. Zheng; Q. Zhou; Y. Mei

收藏 | 浏览/下载：27/0 | 提交时间：2012/04/14

electron paramagnetic resonance pair defect crystal- and ligand-field theory Fe+ GaP paramagnetic-resonance semiconductors crystals co2+ zns