Flux pinning by Al-based nano particles embedded in polycrystalline (Bi,Pb)-2223 superconductors

Ghattas, A; Annabi, Mohamed; Zouaoui, M.; Azzouz, F. Ben; Salem, M. Ben

doi:10.1016/j.physc.2007.10.006

Cited by 107 publications

(37 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, the lattice parameter a is controlled by the length of in-plane Cu-O bond which may be expanded as a result of electrons addition into antibonding orbital that was also caused by the partial replacement of Cu 2+ ions by Ru 4+ ions [29]. For (Bi, Pb)-2223 phase, the granular morphology of the un-substituted sample consists of flaky layers of large platelet-like structure with random alignment distribution which is a signature of (Bi, Pb)-2223 phase formation [30]. The platelet grains are linked well for low Ru-content, up to x = 0.05, in which the platelike grains still have a flaky structure.…”

Section: Resultsmentioning

confidence: 99%

Ion Beam Analysis and Normal-State Conduction Mechanisms for (Bi, Pb)-2223 and (Tl, Pb)/Sr-1212 Superconducting Phases Substituted by Ruthenium

Awad

Roumié

Abou‐Aly

et al. 2011

J Supercond Nov Magn

View full text Add to dashboard Cite

Superconducting samples of type Bi 1.8 Pb 0.4 Sr 2 Ca 2.1 Cu 3−x Ru x O 10+δ , (Bi, Pb)-2223, with 0.0 ≤ x ≤ 0.4 and type Tl 0.5 Pb 0.5 Sr 1.6 Ba 0.4 CaCu 2−x Ru x O 7−δ , (Tl, Pb)/ Sr-1212, with 0.0 ≤ x ≤ 0.525 were synthesized using the standard solid-state reaction technique. The lattice parameters and the surface morphology for these samples were determined using X-ray powder diffraction (XRD) and scanning electron microscope (SEM) measurements, respectively. All element-contents of the samples prepared were estimated from the electron dispersive X-ray (EDX) technique, and their results were compared with those obtained from particle-induced X-ray emission (PIXE). In addition, the oxygen-content was determined using elastic Rutherford backscattering spectroscopy (RBS) technique at 3 MeV proton beam. The superconducting transition temperature T c and the hole carrier concentration P were determined from the electrical resistivity measurement. The data of both T c and P for Bi 1.8 Pb 0.4 Sr 2 Ca 2.1 Cu 3−x Ru x O 10+δ and Tl 0.5 Pb 0.5 Sr 1.6 Ba 0.4 CaCu 2−x Ru x O 7−δ phases increased up to x = 0.05 and 0.075, respectively and then they decreased as x increased. The superconductivity was completely destroyed around x = 0.4 and 0.525 for (Bi, Pb)-2223 and (Tl, Pb)/Sr-1212 phases, respectively. The normal-state electrical resistivity data were analyzed using the two and three dimensional variable range hopping (2D-VRH and 3D-VRH) and the Coulomb gab (CG).

show abstract

Section: Resultsmentioning

confidence: 99%

Ion Beam Analysis and Normal-State Conduction Mechanisms for (Bi, Pb)-2223 and (Tl, Pb)/Sr-1212 Superconducting Phases Substituted by Ruthenium

Awad

Roumié

Abou‐Aly

et al. 2011

J Supercond Nov Magn

View full text Add to dashboard Cite

show abstract

“…Tape manufacturers are investing efforts to create HTS conductor which is less sensitive to magnetic field (improved pinning) and at the same time has higher uniformity with respect to the angle of the external magnetic field (127,128). However, tapes highly sensitive to magnetic field (like 1G) produced at low cost used in combination with HTS tapes less susceptible to magnetic field could result with lower overall cost of the system (field winding).…”

Section: Suggested Methods For Increasing An Hts Winding Performancementioning

confidence: 99%

Superconducting wind turbine generators

Abrahamsen¹,

Mijatović

Seiler³

et al. 2010

Supercond. Sci. Technol.

192

View full text Add to dashboard Cite

We have examined the potential of 10 MW superconducting direct drive generators to enter the European offshore wind power market and estimated that the production of about 1200 superconducting turbines until 2030 would correspond to 10% of the EU offshore market. The expected properties of future offshore turbines of 8 and 10 MW have been determined from an up-scaling of an existing 5 MW turbine and the necessary properties of the superconducting drive train are discussed. We have found that the absence of the gear box is the main benefit and the reduced weight and size is secondary. However, the main challenge of the superconducting direct drive technology is to prove that the reliability is superior to the alternative drive trains based on gearboxes or permanent magnets. A strategy of successive testing of superconducting direct drive trains in real wind turbines of 10 kW, 100 kW, 1 MW and 10 MW is suggested to secure the accumulation of reliability experience. Finally, the quantities of high temperature superconducting tape needed for a 10 kW and an extreme high field 10 MW generator are found to be 7.5 km and 1500 km, respectively. A more realistic estimate is 200–300 km of tape per 10 MW generator and it is concluded that the present production capacity of coated conductors must be increased by a factor of 36 by 2020, resulting in a ten times lower price of the tape in order to reach a realistic price level for the superconducting drive train.

show abstract

“…Nanoparticles have been added to Bi-2223 superconductor to act as pinning centers in order to improve flux pinning ability [3][4][5][6]. Nanosized Al 2 O 3 (50 nm) improved J c of Bi-2223 pellets by 30 % with 0.2 wt% addition [4].…”

Section: Introductionmentioning

confidence: 99%

Transport critical current density of (Bi1.6Pb0.4)Sr2Ca2Cu3O10/Ag superconductor tapes with addition of nanosized CoFe2O4

Hafiz

Abd‐Shukor

2015

Appl. Phys. A

View full text Add to dashboard Cite

The effect of nanosized CoFe 2 O 4 (60 nm) addition on the transport critical current density, J c , of (Bi 1.6 Pb 0.4 )Sr 2 Ca 2 Cu 3 O 10 (CoFe 2 O 4 ) x (x = 0-0.05 wt%) superconductor prepared by the co-precipitation method was investigated. The optimal J c (measured using the fourpoint probe method) was observed in the x = 0.01 wt% pellets. Using this optimal wt%, Ag-sheathed (Bi 1.6 Pb 0.4 )-Sr 2 Ca 2 Cu3O 10 (CoFe 2 O 4 ) 0.01 superconductor tapes were fabricated using the powder-in-tube method. The tapes were sintered for 50 and 100 h at 845°C. The phase and microstructure of the samples were determined using the powder X-ray diffraction method and scanning electron microscopy, respectively. The temperature dependence of J c for the tapes in various applied magnetic fields was also measured.

show abstract

Flux pinning by Al-based nano particles embedded in polycrystalline (Bi,Pb)-2223 superconductors

Cited by 107 publications

References 31 publications

Ion Beam Analysis and Normal-State Conduction Mechanisms for (Bi, Pb)-2223 and (Tl, Pb)/Sr-1212 Superconducting Phases Substituted by Ruthenium

Ion Beam Analysis and Normal-State Conduction Mechanisms for (Bi, Pb)-2223 and (Tl, Pb)/Sr-1212 Superconducting Phases Substituted by Ruthenium

Superconducting wind turbine generators

Transport critical current density of (Bi1.6Pb0.4)Sr2Ca2Cu3O10/Ag superconductor tapes with addition of nanosized CoFe2O4

Contact Info

Product

Resources

About