The effect of sintering temperature on the intergranular properties of Bi2223 superconductors

Kameli, P.; Salamati, H.; Eslami, M.

doi:10.1016/j.ssc.2005.10.026

Cited by 50 publications

(34 citation statements)

References 22 publications

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“…The F0 and F1 samples were annealed isothermally at 830°C for 10 h. As can be seen from the figure that the transition curves from the normal to the superconducting state have double step nature which is more pronounced in F0. We believed that the double step resistive transition could be related to the impurity phases which may play role weak links at the grain boundaries [23]. It is observed that the zero resistivity transition temperature of the F1 (106 K) is higher than that for the F0 sample (100 K).…”

Section: Electrical Measurementsmentioning

confidence: 96%

Some physical properties and Vickers hardness measurements of Fe diffusion-doped Bi1.8Pb0.35Sr1.9Ca2.1Cu3Oy superconductors

Öztürk

2011

J Mater Sci: Mater Electron

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In this study we have investigated the influence of iron diffusion and diffusion-annealing time on the mechanical and the superconducting properties of bulk Bi 1.8 Pb 0.35 Sr 1.9 Ca 2.1 Cu 3 O y superconductors by performing X-ray diffraction (XRD), scanning electron microscopy (SEM), Vickers hardness, dc resistivity (q-T) and critical current density (J c ) measurements. The samples are prepared by the conventional solid-state reaction method. Doping of Bi-2223 was carried out by means of iron diffusion during sintering from an evaporated iron film on pellets. Then, the Fe layered superconducting samples were annealed at 830°C for 10, 30 and 60 h. The mechanical properties of the compounds have been investigated by measuring the Vickers hardness (H v ). The mechanical properties of the samples were found to be load dependent. The load independent Vickers hardness (H 0 ), Young's modulus (E), yield strength (Y), and fracture toughness (K IC ) values of the samples are calculated. These all measurements showed that the values of the Vickers hardness, critical current density, and critical transition temperature and lattice parameter c increased with increasing Fe doping and diffusion-annealing time.

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Section: Electrical Measurementsmentioning

confidence: 96%

Some physical properties and Vickers hardness measurements of Fe diffusion-doped Bi1.8Pb0.35Sr1.9Ca2.1Cu3Oy superconductors

Öztürk

2011

J Mater Sci: Mater Electron

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“…It is well known that the high-T c granular superconductors such as (Bi,Pb) 2 Sr 2 Ca 2 Cu 3 O y generally show a two step resistive transition and a tail in the lower temperature side [12,[26][27][28][29][30]. The peak temperature corresponds to the superconducting transition within the grains and the tail is related to the intergranular coupling.…”

Section: Introductionmentioning

confidence: 99%

Effect of High Valancy Cations on the Intergranular Pinning Energies of (Bi-Pb)2Sr2Ca2Cu3O10+δ Samples

Yazici

Erdem

Özçelık

2012

J Supercond Nov Magn

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In the present work, Bi-Pb-V-Sr-Ca-Cu-Ti-O bulk samples with nominal composition (BiPb) 2 V x Sr 2 Ca 3 Cu 4−y Ti y O 12+δ with x = 0.2 and y = 0.1, 0.2 and 0.3 compounds have been prepared by the melt-quenching method. The magnetoresistance of the samples has been measured for different values of the applied magnetic field. Using the resistivity data, the upper critical magnetic field H c2 (0) at T = 0 K was calculated. The coherence lengths at T = 0 K were calculated from H c2 (0) values. The thermally activated flux creep model has been studied in order to calculate the flux pinning energies. The results showed that H c2 (0) varied from 152.5 to 60.4 T and the flux pinning energies varied from 515 to 184 meV at 0 T, with the content y.

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“…It is well-known that the high-T c granular superconductors having a well defined superconducting transition temperature, generally display a two step resistive transition ρ(T) and, correspondingly, dρ/dT displays a peak and a tail in the lower temperature side [47][48][49].…”

mentioning

confidence: 99%

Sintering Effects in Na-Substituted Bi-(2212) Superconductor Prepared by a Polymer Method

Gürsul

Ekicibil

Özçelık

et al. 2015

J Supercond Nov Magn

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The effect of sintering temperature on the intergranular properties of Bi2223 superconductors

Cited by 50 publications

References 22 publications

Some physical properties and Vickers hardness measurements of Fe diffusion-doped Bi1.8Pb0.35Sr1.9Ca2.1Cu3Oy superconductors

Some physical properties and Vickers hardness measurements of Fe diffusion-doped Bi1.8Pb0.35Sr1.9Ca2.1Cu3Oy superconductors

Effect of High Valancy Cations on the Intergranular Pinning Energies of (Bi-Pb)2Sr2Ca2Cu3O10+δ Samples

Sintering Effects in Na-Substituted Bi-(2212) Superconductor Prepared by a Polymer Method

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