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Science China(Physics,Mechanics & Astronomy) 2007年第2期50卷 240-248页

作者： WANG WeiXian1,ZHOU Fang2,TAN Shun1,WU Huan1 & ZHANG YuHeng1 1 National High Magnetic Field Laboratory,University of Science and Technology of China,Hefei 230026,China 2 National Laboratory for Superconductivity,lnstitute of Physics and the Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080,China National High Magnetic Field Laboratory University of Science and Technology of China Hefei China National Laboratory for Superconductivity Institute of Physics and the Center for Condensed Matter Physics Chinese Academy of Sciences Beijing China

In the strict sense, it is not very clear why with magnetic field increasing, the normal-superconductive (NS) transition becomes broad for Bi2Sr2CaCu208+δ(Bi2212) while the NS transitions are almost parallel for La193Sroo7Cu04+δ(La214). In this paper, R-T relations are measured by the six-probe method. We propose a moving mechanism of the pancake vortex and vortex line for Bi2212. The theoretical curves fit the experiment data well.

关键词： superconductivity superconductive pancake vortex dynamics

Harmonic frequency mixing using high T_c superconductor Josephson junction mounted on pulse tube cryocooler

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Chinese Science Bulletin 2001年第18期46卷 1555-1556页

作者： Weiwei Xu Qingguo Liu Gangdong Zhou Zhengming Ji Peiheng Wu Nanjing Univ Dept Elect Sci & Engn Nanjing 210093 Peoples R China

A frequency mixing system including microwave coupling and intermediate frequency (IF) measurement arrangements is designed. In lieu of liquid nitrogen, a pulse tube cryocooler is used to cool the whole system. With YBa2Cu3O7/Yttrium stabilized zirconia (YBCO/YSZ) bicry-stal Josephson junction as the mixing element, 36th harmonic frequency mixing at the 8 mm waveband is obtained.

关键词： high temperature superconductive junction harmonic frequency mixing pulse tube crycooler.

THE SUPERCONDUCTIVITY OF YBa_2Cu_3O_(7-δ) SYSTEM WITH TRANSITIONAL STRUCTURE FROM TETRAGONAL PHASE TO ORTHORHOMBIC PHASE

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Science China Mathematics 1990年第4期33卷 423-429页

作者：张裕恒王军岳奕胡俊宝孟广耀彭定坤汪成有曹烈兆 University of Science and Technology of China Hefei 230026 PRC

The intermediate YBa2Cu3O7-δ samples of single phase with transitional structure from tetragonal phase to orthorhombic phase are prepared by quenching at different temperatures and investigated systematically. From X-ray diffraction (XRD), R-T curve and ac susceptibility measurements, it can be concluded that the structure transits from tetragonal phase to orthorhombic phase as the quenching temperature decreases; the YBa2Cu2O7-δ samples with tetragonal phase are nonsuperconductive till 4.2K; the critical temperature depends on the degree of orthorhombic distortion in the intermediate samples; the possible existence of a structure phase transition near 100K for the non-superconductive tetragonal phase is discovered for the first time. The electrical conductance property at high temperature region (higher than 100K) for the samples quenched at higher temperature can be explained in terms of the affection of oxygen vacancies.

关键词： YBa2Cu3Oτ-δ crystal structure superconductive phase transition norml state resistance.

ORIENTATION DETERMINATION OF HIGH T_c BSCCO SINGLE CRYSTAL BY SIMULATING KOSSEL DIFFRACTION

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Chinese Science Bulletin 1991年第17期36卷 1441-1443页

作者：张建中王文利李百秦沈惠敏徐永兵王业宁 Department of Physics Nanjing University Nanjing 210008 PRC

In order to understand the possible mechanisms responsible for the superconductivity of high T_c oxides, the study of their structures and physical properties is in progress worldwide. The samples investigated are bei... 详细信息

关键词： high T_c superconductive single crystal simulation of pseudo-Kossel diffraction orientation determination.

X-RAY DIFFRACTION STUDY OF A NEW SUPERCONDUCTOR Tl_(2-x)Eu_xBa_2Ca_2Cu_3O_(10)

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Chinese Science Bulletin 1991年第11期36卷 896-899页

作者：周衡南丁世英余正周礼陈峻 Department of Physics Nanjing University Nanjing 210008 PRC Department of Physics Central Florida University USA

Ⅰ. INTRODUCTIONAfter H. Maeda et al. discovered a high T_c superconductor in the Bi-Sr-Ca-Cu-O system, which does not contain any notable rare-earth element, Z. Z. Sheng et al. discovered subsequently another high T_c superconductor in T1-Ba-Ca-Cu-O system. Its T_c seems higher than Bi-system. The crystal structure and superconductivity of both oxides were stated to be either identical or isomorphous. There are two or three superconductive phases with T_c～85 K and ～105 K or even higher. These phases are of 2212 and 2223, or even of more different in chemical composition, usually called as the lower and the higher superconductive phases. A number of studies were carried out to explore a pure single superconductive phase with different treatments and to find out their structure relation for these phases.

关键词： substitution high-T_c superconductive phase computer simulation for X-ray diffraction immanent chaos in perovskite structure.

HCFL Lamp Only Lights Up under Coexistence of Cathode and Anode in Ar Gas Space for Half Cycle of AC Driving Circuit

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Journal of Power and Energy Engineering 2019年第2期7卷 1-13页

作者： Lyuji Ozawa Beijing China

Vacuum space between Ar atoms in unlighted HCFL lamps is an electric insulator, because vacuum fills up with strong negative electric field from orbital electrons in 3p6 electron shell of Ar atoms. Vacuum space in lighted FL lamps changes to the neutral vacuum that provides a superconductive vacuum for moving electrons at above room temperature. The complications of lighting mechanisms of HCFL lamps for more than 80 years have clearly solved with coexistence of disparate external and internal electric circuits for each half cycle. External electric circuit acts as two roles. One helps for formation of internal electric circuit in Ar gas space by electric field. Other picks up induced voltages from capacitor CFL. HCFL lamp only lights up with moving electrons in internal DC driving circuit. Electrons in HCFL lamp only move from cathode to anode, which respectively have negative and positive potentials against grand (V = 0), and which are formed with volumes of heated corona light (4G) at around W-filament metal electrodes with a help of heated BaO particles. The HCFL lamp that emits thermoelectrons is a false story. Here we have totally revised the fundamentals of the lighting mechanism of the established HCFL lamps for last 80 years.

关键词： FL Lamp Cathode and Anode superconductive Vacuum Operation Life

Characteristic Properties of Advanced Coil-External Electrodes of Fluorescent Lamps

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Journal of Materials Science and Chemical Engineering 2018年第2期6卷 33-64页

作者： Lyuji Ozawa Independent Scholar Beijing China

The coil-EEFL lamps, which are operated with DC driving circuit, have studied. The figure of the merit of the coil-EEFL lamps is the quantum efficiency (ηq) that is given by the emitted visible photons by one moving electron in the FL lamp. The electrons in the FL lamps move on in the superconductive vacuum (R = 0) in the positive column at above room temperature, giving rise to the astronomical ηq = 1013 visible photons (m3.s)-1. Miraculously, the developed coil-EEFL lamps in the parallel connections light up with WDC = 0, without the sacrifice of the illuminance (lm.m-2). Furthermore, the scraped 40 W-HCFL lamps revitalize to the coil-EEFL lamps, promising the operation life longer than 106 hours. The shallow gap between phosphor screen and positive column can be made by side by side arrangement of the low voltage CL phosphor particles and PL phosphor particles. The coil-EEFL lamps in parallel connections may contribute to the Green Energy Projects of UN.

关键词： Green Energy FL Lamps Power Consumption Operation Life superconductive Vacuum

Design and Development of Impeller Synergic Systems of Electromagnetic Type to Levitation/Suspension Flight of Symmetrical Bodies

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Journal of Electromagnetic Analysis and Applications 2012年第1期4卷 42-52页

作者： Francisco Bulnes Juan Carlos Maya Isaías Martínez 不详

Using certain models of twistor surfaces for fields of force and the mathematical relationships that lie among fields, lines, surfaces and flows of energy, it has been designed and developed a flight electromagnetic type system based on the synergic study of their electromagnetic field geodesics to generate vehicle levitation, suspension and movement without being in contact with the surface. The idea of such work is to obtain a new flight and impulse patent of an electromagnetic vehicle by principles of super-conduction and some laws of the current like Eddy currents and principles which are very similar to mechanics of sidereal objects like galaxies or stars under models of twistor surfaces. This vehicle will be controlled by one microchip that will be programmed by conscience operators algebra of electromagnetic type that leads to the flow of Eddy currents, the iso-rotations and suspension of the special geometrical characteristics vehicle, generating also on the vehicle structure certain “magnetic conscience” that provokes all movements like succeeding to the sidereal objects in the universe.

关键词： Electromagnetic Levitation Twistor Surfaces of Impulse Symmetrical Space of Iso-Rotations superconductive Quantum Algebra Magnetic Conscience Operators