Relationship between microstructure and superconducting properties in hot-pressed Bi-2212/Ag ceramic composites

Kahraman, Funda; Sotelo, A.; Madre, M. A.; Díez, J. C.; Özkurt, Berdan; Rasekh, Sh.

doi:10.1016/j.ceramint.2015.08.029

Cited by 15 publications

(5 citation statements)

References 38 publications

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“…1a. In the graph, it can be seen that most of the peaks are associated to the Bi-2212 phase, accompanied by metallic Ag, in agreement with previous works [14,29]. Moreover, some more peaks can be observed; even if they cannot be associated to any secondary phase due to their very low intensity, previous studies showed that Bi-2201, (Ca,Sr)CuO 2 , or Ca 14 Cu 24 O 41 can be found in these compounds [26].…”

Section: Resultssupporting

confidence: 91%

“…Another possibility is based on the modification of charge carrier concentration in the Cu-O planes and/or enhancing the grain alignment [7][8][9][10][11][12], which can influence critical temperature, critical current density (J c ), and critical magnetic field (H c ). The most usual techniques to produce the grain alignment in the bulk materials are spark plasma texturing [13], hot uniaxial pressing [14], the Laser Floating Zone (LFZ) [15], and the Electrically Assisted Laser Floating Zone (EALFZ) [8]. Among these techniques, the LFZ method has many advantages for obtaining long BSCCO fibers grown at high rates.…”

Section: Introductionmentioning

confidence: 99%

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Impact of silver addition on the superconducting performances of Bi2Sr2Ca0.925Na0.075Cu2Oy:Ag composite fibers

Atilla¹,

Ergin²,

Gürsul³

et al. 2022

Journal of the European Ceramic Society

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Impact of silver addition on the superconducting performances of Bi2Sr2Ca0.925Na0.075Cu2Oy:Ag composite fibers

Atilla¹,

Ergin²,

Gürsul³

et al. 2022

Journal of the European Ceramic Society

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“…As a result of the calculations, it has been seen that the p values were between 0.201 and 0.247 and increased as the MWCNT addition was increased (see Table II). It was previously calculated that the mean p-value for the BSCCO system was between 0.16 and 0.116 for Bi 2 Sr 2 Ca 2 Cu 3 O y , between 0.22 and 0.16 for Bi 2 Sr 2 CaCu 2 O x , and higher than 0.22 for Bi 2 Sr 2 Cu 1 O y [6,50,53,54]. In this work, for the low MWCNT additions, such as the 1, 3, and 5 wt% addition cases, the p-value was found to be close to the upper limit of the Bi 2 Sr 2 CaCu 2 O x system, but as the addition rate increases, the upper limit of 0.22 is exceeded.…”

Section: Mwcnt Addition Level [Wt%]mentioning

confidence: 99%

Role of Multi-Walled Carbon Nanotube Addition in Superconducting Properties of Bi₂Sr₂CaCu₂O_8+s Glass-Ceramic Superconductors

Yakinci

Çiçek

2023

Acta Phys. Pol. A

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In this work, pure and with 1, 3, 5, 10, and 15 wt% multi-walled carbon nanotube addition Bi2Sr2CaCu2O8+s glass-ceramic materials have been investigated in terms of thermal, structural, microstructural, electrical, and magnetic properties. Multi-walled carbon nanotubes with a purity of 96% were used to enhance electrical transport properties. Thermal properties have been examined using differential thermal analysis. According to the differential thermal analysis, the multi-walled carbon nanotube addition reduced the melting temperature and slightly increased the crystallization activation energy of the BiSrCaCuO material. X-ray analyses showed that all samples have tetragonal symmetry and did not change with addition, but a small change in the c-axis is observed. Scanning electron microscope analyses showed no significant morphological change. The effect of the additive on the resistivity measurements was found to be limited, and zero resistance temperature increased up to a level of 5 wt% addition and then decreased drastically for higher addition cases. The hole concentration of the samples was calculated, and it was found that there was a shift towards the over-doped region with the addition. For the transport critical current density measurements, the highest increase of about 30% was obtained for the sample with 5 wt% multi-walled carbon nanotube addition, but in high addition cases, significant losses were obtained. A similar situation occurred in magnetization versus magnetic field measurements, and the highest magnetization critical current density value obtained ẘas 4.1 × 10 6 A/cm 2 at 4.2 K in the 5 wt% multi-wall carbon nanotube added sample. topics: multi-wall carbon nanotube, high-temperature superconductors, BSCCO glass-ceramic, BSCCO superconductors

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“…The granular features of ceramic superconductors such as grain size, connectivity and porosity significantly affect its superconducting and current-carrying ability. Efforts to improve grain structure and connectivity include doping and several fabrication processes such as hot pressing, melt growth and laser floating zone techniques [1][2][3][4]. Increasing the size of superconducting grains could reduce the grain boundary loss through which current flows.…”

Section: Introductionmentioning

confidence: 99%

Effect of In2O3 on the grain connectivity and superconducting behavior of Bi2Sr2−xInxCaCu2O8+d

et al. 2018

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The effect of In 2 O 3 on grain connectivity and superconducting properties of Bi-2212 was investigated. Indium was intentionally doped on the Sr-site of BSCCO at doping levels from x = 0 to x = 0.8. Accessing the Sr lattice site in BSCCO provides useful control on the possible effect of indium on its superconducting behavior and microstructural properties. Results show that the superconductivity persists in BSCCO even at high indium concentration (x = 0.8). However, secondary phases form at x ≥ 0.4 indium concentration affecting normal resistivity, magnetic susceptibility response and superconducting transition temperature of BSCCO. Formation of secondary phases weakens the diamagnetic intergrain coupling. An apparent increase in the formation of micron-sized grains is related to the increased sinterability of BSCCO with indium doping. The enhanced sinterability of BSCCO with indium provides possibility of synthesizing thin films with reduced thermal heat treatment.

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Relationship between microstructure and superconducting properties in hot-pressed Bi-2212/Ag ceramic composites

Cited by 15 publications

References 38 publications

Impact of silver addition on the superconducting performances of Bi2Sr2Ca0.925Na0.075Cu2Oy:Ag composite fibers

Impact of silver addition on the superconducting performances of Bi2Sr2Ca0.925Na0.075Cu2Oy:Ag composite fibers

Role of Multi-Walled Carbon Nanotube Addition in Superconducting Properties of Bi₂Sr₂CaCu₂O_8+s Glass-Ceramic Superconductors

Effect of In2O3 on the grain connectivity and superconducting behavior of Bi2Sr2−xInxCaCu2O8+d

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Relationship between microstructure and superconducting properties in hot-pressed Bi-2212/Ag ceramic composites

Cited by 15 publications

References 38 publications

Impact of silver addition on the superconducting performances of Bi2Sr2Ca0.925Na0.075Cu2Oy:Ag composite fibers

Impact of silver addition on the superconducting performances of Bi2Sr2Ca0.925Na0.075Cu2Oy:Ag composite fibers

Role of Multi-Walled Carbon Nanotube Addition in Superconducting Properties of Bi2Sr2CaCu2O8+s Glass-Ceramic Superconductors

Effect of In2O3 on the grain connectivity and superconducting behavior of Bi2Sr2−xInxCaCu2O8+d

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Role of Multi-Walled Carbon Nanotube Addition in Superconducting Properties of Bi₂Sr₂CaCu₂O_8+s Glass-Ceramic Superconductors