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Hydrogen Sensing Property of Lanthanum Complex Fluoride

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Journal of Rare Earths 1993年第2期11卷 115-119页

作者：吴明娒任玉芳 Changchun Institute of Applied Chemistry Academia SinicaChangchun 130022China

Four potentiometer sensor cells have been prepared by using La0.95Pb0.05F2.95 as solid electrolyte(SE) and various materials as electrodes. The sensor cell `Bi(BiF3)|SE|Pt' exhibits the best performance with its 90% response time as short as 75 s to 100 Pa H2 in air at room temperature and with its linear decrease of electromotive force (EMF) with an increase of the logarithm of hydrogen partial pressure in the experimental range. The sensor cell shows weaker response to CO.

关键词： electric field effects Fluorine compounds Gas sensing electrodes Hydrogen Pressure effects Solid electrolytes Thermal effects

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Influence of strain on hydrogenic impurity states in a GaN/ Al_xGa_(1-x)N quantum dot

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Optoelectronics Letters 2009年第2期5卷 85-88页

作者：张彬闫祖威 Department of Physics Inner Mongolia UniversityHohhot 010021 China Colleges of Sciences Inner Mongolia Agricultural UniversityHohhot 010018 China

Within the effective-mass approximation, we calculated the influence of strain on the binding energy of a hydrogenic donor impurity by a variational approach in a cylindrical wurtzite GaN/AlxGa1-xN strained quantum dot, including the strong built- in electric field effect due to the spontaneous and piezoelectric polarization. The results show that the binding energy of impurity decreases when the strain is considered. Then the built-in electric field becomes bigger with the Al content increasing and the bin...

关键词： Aluminum Binding sites electric field effects Gallium Nuclear energy Potential energy Semiconductor quantum dots Semiconductor quantum wells Zinc sulfide

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FEM Edge Effect and Capacitance Evaluation on Cylindrical Capacitors

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Journal of Energy and Power Engineering 2012年第12期6卷 2063-2069页

作者： Jose-M. Bueno-Barrachina Cesar-S. Cafias-Penuelas Saturnino Catalan-Izquierdo lnstituto Tecnologico de la Energla Universitat Politecniea de Valencia Valencia 46022 Spain

The purpose of this paper is to show the influence of the edge-effect on the electric field distribution, and hence on the inner capacitance and outer capacitance of a cylindrical capacitor surrounded by an insulating medium. To generalize the results, a two-dimensional axisymmetric finite element model of a cylindrical capacitor has been generated and the problem has been resolved taking into account the distance between the conductors for a complete set of dimensions. The available obtained results have been compared with previous published works. Finally, using statistical tools, the mathematical expression for computing the relationship between capacitance and insulation gap and cylindrical plates dimensions has been obtained.

关键词： Capacitance electric field effects simulation space charge.

Multiphoton Ionization Spectra of Yb Atom in electric fields

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Chinese Journal of Lasers 2000年第4期 74-79页

作者： FANG Dawei 1 ZHANG Yi 1 HUANG Yongme XIE Weijun 2 LIU Yuyan 3 ( 1 Optoelectronic Research Center, China Institute of Metrology, Hangzhou 310034, China 2 Department of Physics, Jiujiang Normal College, Jiujiang 332000, China

This paper reports the investigation of the resonance spectra of different highly excited states of Yb atom in electric fields from near zero to 15000V/cm by means of multiphoton excitation. Most of observed resonance peaks are identified and the selection rules and the intensities of the transition are discussed. The evolutions of the lines in applied electric fields are observed and analyzed. The results shows that transitions involving the excitation of the 4f 14  subshell play an important role in the spectral behavior of highly excited states of Yb atom.

关键词： Yb atom multiphoton excitation photoionization electric field effects