Physical, magnetic and mechanical properties of Bi-2212 superconductors prepared by high pelletization pressure

Aytekin, M. Ersin; Özkurt, Berdan; Sugözü, İlker

doi:10.1007/s10854-014-2613-8

Cited by 15 publications

(11 citation statements)

References 27 publications

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“…3b. For the pristine Bi2212 sample, a T c onset of 100 K was observed, in agreement with previously reported values 21, 22 , and the material exhibited metallic-like conductivity at temperatures greater than 100 K. Additionally, a T c of 84 K and zero resistivity at ~55 K are also evident from the blue curve. For the treated sample composed of a combination of Bi2212 and Bi2201, the resistivity did not decrease to zero.…”

Section: Resultssupporting

confidence: 90%

“…Many materials become superconducting under a certain pressure, including Bi 2 Te 3 , Sb 2 Se 3 , H 2 S, and WTe 2 14–16 , motivating many researchers to direct their attention to pressure-induced superconductors. However, most of these efforts have focused on the exertion of hydrostatic pressure 14, 15, 17–21 and element substitution 3, 22–25 . Direct loading on superconductor materials with dynamic high temperature and high pressure has not been reported to date.…”

Section: Introductionmentioning

confidence: 99%

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Shockwave-Loading-Induced Enhancement of T c in Superconducting Bi2Sr2CaCu2O8+δ

Liu

Wang

et al. 2017

Sci Rep

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We report a shockwave method for altering the properties of the superconductor material Bi2Sr2CaCu2O8+δ (Bi2212). We find that the superconducting transition temperature (T c) increases from 84 K for the pristine sample to 94 K for the sample treated at a temperature and pressure of ~1200 K and ~31 GPa, respectively. X-ray diffraction and transmission electron microscopy characterizations indicate that this T c enhancement arises from a phase transition from pristine Bi2212 to a mixture of superconducting Bi2212 and semiconducting Bi2Sr2CuO6+δ (Bi2201) during the shockwave treatment. The shockwave-treated sample exhibits n-type semiconductor properties (with an on-off ratio ~5), in contrast to the pure metallic pristine sample. Our study offers an alternative route for modifying the superconducting properties via a shockwave treatment. Furthermore, this method may provide a new approach for studying other temperature- and pressure-sensitive materials.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Shockwave-Loading-Induced Enhancement of T c in Superconducting Bi2Sr2CaCu2O8+δ

Liu

Wang

et al. 2017

Sci Rep

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“…The microstructural properties of ceramic materials depend strongly on physical forming procedure such as pressing, as well as the synthesis procedure. For example, Berdan et al reported that when the pressure is increased to a certain amount, the microstructure and conductivity properties are gradually deteriorated but after the critical pressure value these properties are improved . This indicates that the optimal value is important and optimal value is not achieved with isostatic pressing value in our work for synthesized materials.…”

Section: Resultsmentioning

confidence: 74%

Synthesis and microstructural characterization of δ‐phase bismuth‐based electroceramic systems by double‐doping regime

Yılmaz

Celen

2017

Int J Applied Ceramic Tech

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In this study, Bi 2 O 3 -based (Er 2 O 3 ) x (Gd 2 O 3 ) y (Bi 2 O 3 ) 1-x-y ternary compound powders were synthesized with different stoichiometric ratios by the solid-state reaction method at different annealing treatment. Crystal structure characterization was investigated via X-ray powder diffraction method in order to determine the fcc-cubic phases powders. Microstructure properties of pellet samples obtained from scanning electron microscopy. Also, thermal properties and porosity were investigated via differential thermal analysis and Brunauer-Emmett-Teller analysis. d-Phase structure was provided at all ternary samples at 800°C heat treatment temperature. The relationship between lattice parameters and total dopant rate was analyzed. As the amount of dopant rate increased, lattice parameters were increased. In conclusion, a correlation between the ionic radius of the dopant cations and lattice parameters was revealed. K E Y W O R D S solid oxide fuel cell, bismuth oxide, electroceramics, microstructure

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“…Bi 2 Sr 2 Ca n Cu n?1 O 8?d (Bi-based) high-temperature superconductors have been widely focused as their non-toxicity, rare-earth-free and various phase composition [1][2][3][4]. The most typical Bi-based cuprate superconductors are Bi2201 (n = 1, Michel et al 1987), Bi2212 (n = 2, von Schnering et al 1988), and Bi2223 (n = 3, Takano et al 1988), whose critical transition temperature (T c ) can arrive at 20 K, 90 K, and 110 K, respectively [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Bi2Sr2CaCu2O8+δ(Bi2212) superconductor by Pechini sol–gel method: thermal decomposition and phase formation kinetics of the precursors

Zhao

Wang

et al. 2020

J Mater Sci: Mater Electron

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Bi2212 high-temperature superconductors were prepared using Pechini sol-gel method, and the thermal decomposition process under air condition was obtained by synchronous thermal analyzer. The synthesis mechanisms of Bi2212 phase were determined by the combination of universal integral, differential and multi-rate scanning methods. The crystallization behavior, morphology, and superconductivity of the samples were characterized and analyzed by XRD, FESEM, PPMS, and SQUID, respectively. The results exhibited that the thermal decomposition reactions of the precursors were divided into three stages. The kinetics of Bi2212 synthesis reaction followed the mechanism mode of random nucleation and subsequent growth (n = 3) during the third stage which were used to guide the heat treatment of the final products. The average activation energy and the pre-finger factor of the synthesis reaction were 226 kJ/mol and 1.84 9 10 11 /min, respectively. Finally, the Bi2212 superconductor with high purity and acceptable performance with the T c, onset of 77.1 K, T c, zero of 63.5 K, and the J c of 5.94 9 10 4 A/cm 2 , respectively, were prepared with shorter sintering time.

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Physical, magnetic and mechanical properties of Bi-2212 superconductors prepared by high pelletization pressure

Cited by 15 publications

References 27 publications

Shockwave-Loading-Induced Enhancement of T c in Superconducting Bi2Sr2CaCu2O8+δ

Shockwave-Loading-Induced Enhancement of T c in Superconducting Bi2Sr2CaCu2O8+δ

Synthesis and microstructural characterization of δ‐phase bismuth‐based electroceramic systems by double‐doping regime

Preparation of Bi2Sr2CaCu2O8+δ(Bi2212) superconductor by Pechini sol–gel method: thermal decomposition and phase formation kinetics of the precursors

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