Influence of boron-containing dopants on the formation of superconducting phase in the system Bi(Pb)-Sr-Ca-Cu-O

Eremina, Elena; Av, Kravchenko; Казин, П. Е.; Tretyakov, Yuri D.; Jansen, Martin

doi:10.1088/0953-2048/11/2/009

Cited by 17 publications

(4 citation statements)

References 11 publications

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“…If theoretical density is assumed to be equal to 6.3 g/cm 3 , this indicates that the pellets do have 29-40% porosity. It was reported that addition of 20-30% Ag increases the material density, improves the grain boundaries and increases pinning strength [24].…”

Section: System IImentioning

confidence: 99%

Effect of Compaction Pressure on Structural and Superconducting Properties of Bi-2223 Superconductors

Kocabaş

Gökçe

Çiftçioğlu

et al. 2009

J Supercond Nov Magn

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In this work, effects of compaction pressure on the structural and superconducting properties of BSCCO ceramic superconductors were investigated. The study was carried out on two systems which were, System I: Bi 1.7 Pb 0.3 Sr 2 Ca 2 Cu 3 O y and System II: Bi 1.6 Pb 0.3 Ag 0.1 Sr 2 Ca 2 Cu 3 O y , respectively. Ceramic powders were prepared by conventional solid-state reaction method and sintered at 850°C after compaction at five different pressures in the 150-750 MPa range. Critical temperatures of samples were determined by resistivity-temperature determinations made by four-point probe method in liquid nitrogen conditions. XRD analysis was conducted by powder X-ray diffraction method. Morphology of the grains present in the samples were determined by using scanning electron microscope (SEM) photographs at 2 K× and 2.5 K× magnifications for System I and System II, respectively. Sintered densities of the superconducting ceramics were measured by Archimedes water displacement method and unit cell parameters were additionally obtained from XRD data. T c values for System I was determined to be in the 109-115 K with sample D having the highest T c of 115 K while T c varied in the 104-109 K range and sample B had the highest T c value of 109 K for System II. The transition width, which is a sign of the purity of the samples, was determined to be narrow for both systems. The data obtained from X-ray diffraction measurements have shown that 2223 high-T c phase was dominant in both systems. The determination of the optimum pellet compaction pressure for BSCCO ceramic superconductors was the main purpose of this work. The results of this work indicated that compaction at around 450 MPa improves the superconducting and structural properties of the BSCCO ceramic superconductors.

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Section: System IImentioning

confidence: 99%

Effect of Compaction Pressure on Structural and Superconducting Properties of Bi-2223 Superconductors

Kocabaş

Gökçe

Çiftçioğlu

et al. 2009

J Supercond Nov Magn

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“…224,225,229,230 Introduction of submicrometre-sized SrZrO 3 particles into (Bi,Pb)2223 ceramics causes an increase in the current flowing within grains. 176 At the same time, the Ca 2 B 2 O 5 additive has little effect on J c , 218 while the addition of BiSr 1.5 Ca 0.5 Al 2 O z and vanadium-containing oxide (see Table 2) leads to reduction of J c , especially at nonzero magnetic fields. 219,225 Considerable enhancement of magnetic flux pinning was observed upon introduction of MgO in the form of micro-and nanoparticles or nanowhiskers into the (Bi,Pb)2223 ceramics and silver-sheathed tapes.…”

Section: Microcomposites Based On Phases Of the Bi ± (Pb) ± Sr ± Ca ±...mentioning

confidence: 99%

Microcomposites based on superconducting cuprates

Казин¹,

Tretyakov²

2003

Russ. Chem. Rev.

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Chemical aspects of the formation of microcomposites Chemical aspects of the formation of microcomposites based on superconducting cuprates are considered. The materials based on superconducting cuprates are considered. The materials are composed of a superconducting ceramic matrix and micro-or are composed of a superconducting ceramic matrix and micro-or nanoinclusions of the non-superconducting phase, which are nanoinclusions of the non-superconducting phase, which are uniformly distributed in the matrix. Requirements on the operat-uniformly distributed in the matrix. Requirements on the operating characteristics of the superconducting ceramics are described ing characteristics of the superconducting ceramics are described and routes to high critical current densites are outlined. Phase and routes to high critical current densites are outlined. Phase equilibria in the generic systems are considered. Physical and equilibria in the generic systems are considered. Physical and chemical criteria for the choice of phases that can form non-chemical criteria for the choice of phases that can form nonsuperconducting inclusions are proposed. Methods of prepara-superconducting inclusions are proposed. Methods of preparation and the microstructures and superconducting properties tion and the microstructures and superconducting properties of the composites based on cuprates RBa of the composites based on cuprates RBa 2 2 Cu Cu 3 3 O O 7 77 7d d (R is the (R is the rare-earth element) and on Bi rare-earth element) and on Bi 2 2 Sr Sr 2 2 CaCu CaCu 2 2 O O 8+ 8+d d and and (Bi,Pb) (Bi,Pb) 2 2 Sr Sr 2 2 Ca Ca 2 2 Cu Cu 3 3 O O 10+ 10+d d are considered. The bibliography are considered. The bibliography includes 247 references includes 247 references. .

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“…Hence, researchers have done substantial work to improve their T C . At present, the most commonly used method is chemical doping, such as doping Cs [ 17 ], Al [ 18 ], SnO 2 [ 19 ], ZrO 2 [ 20 ], Ca 2 B 2 O 5 [ 21 ], and others in BSCCO. However, most of the dopants are unstable at high temperatures and will react with superconductors; the results are not ideal.…”

Section: Introductionmentioning

confidence: 99%

Relationship between the TC of Smart Meta-Superconductor Bi(Pb)SrCaCuO and Inhomogeneous Phase Content

Chen

Wang

et al. 2021

Nanomaterials

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A smart meta-superconductor Bi(Pb)SrCaCuO (B(P)SCCO) may increase the critical transition temperature (TC) of B(P)SCCO by electroluminescence (EL) energy injection of inhomogeneous phases. However, the increase amplitude ΔTC (ΔTC=TC−TC,pure) of TC is relatively small. In this study, a smart meta-superconductor B(P)SCCO with different matrix sizes was designed. Three kinds of raw materials with different particle sizes were used, and different series of Y2O3:Sm3+, Y2O3, Y2O3:Eu3+, and Y2O3:Eu3++Ag-doped samples and pure B(P)SCCO were prepared. Results indicated that the TC of the Y2O3 or Y2O3:Sm3+ non-luminescent dopant doping sample is lower than that of pure B(P)SCCO. However, the TC of the Y2O3:Eu3++Ag or Y2O3:Eu3+ luminescent inhomogeneous phase doping sample is higher than that of pure B(P)SCCO. With the decrease of the raw material particle size from 30 to 5 μm, the particle size of the B(P)SCCO superconducting matrix in the prepared samples decreases, and the doping content of the Y2O3:Eu3++Ag or Y2O3:Eu3+ increases from 0.2% to 0.4%. Meanwhile, the increase of the inhomogeneous phase content enhances the ΔTC. When the particle size of raw material is 5 μm, the doping concentration of the luminescent inhomogeneous phase can be increased to 0.4%. At this time, the zero-resistance temperature and onset transition temperature of the Y2O3:Eu3++Ag doped sample are 4 and 6.3 K higher than those of pure B(P)SCCO, respectively.

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Influence of boron-containing dopants on the formation of superconducting phase in the system Bi(Pb)-Sr-Ca-Cu-O

Cited by 17 publications

References 11 publications

Effect of Compaction Pressure on Structural and Superconducting Properties of Bi-2223 Superconductors

Effect of Compaction Pressure on Structural and Superconducting Properties of Bi-2223 Superconductors

Microcomposites based on superconducting cuprates

Relationship between the TC of Smart Meta-Superconductor Bi(Pb)SrCaCuO and Inhomogeneous Phase Content

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