全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:H.L. Zheng , C.P. Kang
来源:[J].Optica Applicata(IF 0.541), 2010, Vol.40 (3), pp.737DOAJ
摘要:A polymer-silica hybrid 2×2 thermo-optic switch is demonstrated. The top cladding and core layer are composed of polymers, while the bottom cladding is made of silica. Since polymer and silica have opposite signs of thermo-optic coefficients, the change of the refractive in...
作者:H.L. Zheng , S.N. Zhang ...
来源:[J].Physica C: Superconductivity and its applications(IF 0.718), 2020Elsevier
摘要:Abstract(#br)In the past two years, the record of current carrying capacity of Bi 2 Sr 2 CaCu 2 O x (Bi-2212) wire has been broken many times by using improved powder, which shows that the precursor powder plays an important role in the preparation of Bi-2212 wire. In order to im...
作者:H.L. Zheng , S.N. Zhang
来源:[J].Journal of Alloys and Compounds(IF 2.39), 2018, Vol.742, pp.897-902Elsevier
摘要:Abstract(#br)The voids in Bi 2 Sr 2 CaCu 2 O x (Bi-2212) long-length wire should be eliminated as far as possible in order to improve its current-carrying capacity. There are several reasons for the void formation in Bi-2212 wire, mainly including the gas adsorbed on powder and e...
作者:H.L. Zheng , Z.M. Yu ...
来源:[J].Physica C: Superconductivity and its applications(IF 0.718), 2003, Vol.386, pp.138-141Elsevier
摘要:Abstract(#br)The phase assemblage of precursor powder was controlled by changing the calcination temperature from 830 to 860 °C. The microstructure and the critical current density of tapes were strongly dependent on the phase composition of the precursor powder. SEM analysi...
作者:H.L. Zheng , P. Ji ...
来源:[J].Physica C: Superconductivity and its applications(IF 0.718), 2003, Vol.392, pp.1011-1014Elsevier
摘要:Abstract(#br)The multifilamentary (Bi,Pb)-2223 tapes with Ag-alloy sheath were fabricated by powder-in-tube method. Critical current density ( J c ) of the tape reached 3 × 10 4 A/cm 2 at 77 K, self-field, and the tensile strain enhanced to about two times of the pure Ag-she...
作者:H.L. Zheng , X.M. Xiong ...
来源:[J].Physica C: Superconductivity and its applications(IF 0.718), 2003, Vol.386, pp.142-145Elsevier
摘要:Abstract(#br)The heat-treatment parameters of both the calcination and the reaction heat treatment play a crucial role in the achievement of high quality (Bi,Pb)-2223/Ag tapes. The melting process has been successfully used for the processing (Bi,Pb)-2212 in order to achieve good...
作者:H.L. Zheng , X.M. Xiong ...
来源:[J].Physica C: Superconductivity and its applications(IF 0.718), 2003, Vol.386, pp.127-130Elsevier
摘要:Abstract(#br)In this work, the phase assemblage of the precursor powder, especially the Ca 2 PbO 4 phase, was changed by adjusting the powder calcination temperature and the correlation between the properties of precursor powder and the heat treatment process of tapes, as well as...
作者:H.L. Zheng , Z.M. Yu
来源:[J].Physica C: Superconductivity and its applications(IF 0.718), 2004, Vol.412, pp.1120-1123Elsevier
摘要:Abstract(#br)In this study, the J c value was improved considerably by optimization of heat treatment for Bi-2223 phase formation and the post-annealing for adjustment of non-superconducting phases. As a result, high critical current ( I c ) of 110 A (77 K) has been obtained on A...
作者:H.L. Zheng , S.H. Wu ...
来源:[J].Physica C: Superconductivity and its applications(IF 0.718), 1997, Vol.282-287, pp.2605-2606Elsevier
摘要:Abstract(#br)Ag-sheathed multifilamentary Bi-2223 tapes have been fabricated by a conventional powder-in-tube method with an optimum final heating program. Many heating programs were done by varying sintering time (t s ), post annealing time (t p ) and cooling rate (R) from ...
作者:H.L. Zheng , S.M. Yan ...
来源:[J].European Journal of Pharmacology(IF 2.592), 2014, Vol.730, pp.41-50Elsevier
摘要:Abstract(#br)Insulin resistance has been proposed to play a pivotal role in vasoconstriction due to increased oxidative stress. Hyperthyroidism would amplify cardiovascular disease risk in diabetic patients, though thyroid hormone advance vascular relaxation and reduce vascu...

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