Formation mechanism of high-Tc and critical current in (Bi,Pb)2Sr2Ca2Cu3O10/Ag tape

Hu, Q.Y.; Liu, H.K.; Dou, Shi Xue

doi:10.1016/0921-4534(95)00193-x

Cited by 86 publications

(38 citation statements)

References 15 publications

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“…A small amount of Bi2212 (marked as 4) and Ca 2 PO 4 (marked as *) was also found in the patterns. We used the peak intensity ratio of X 2223 = H(0010)/[H(0010) + L(008)] to represent the molar fraction of Bi2223 phase in the samples [10]. H and L stand for the high-T c phase (Bi2223 phase) and low-T c phase (Bi2212 phase), respectively.…”

Section: Resultsmentioning

confidence: 99%

The Impact of Fe Doping on Jc Behavior of Bi2223/Ag Tapes under Magnetic Field

Xiao

Song

et al. 2002

phys. stat. sol. (a)

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Bi1.8Pb0.4Sr2Ca2.2Cu3—xFexOy silver‐sheathed (Bi2223/Ag) tapes with different Fe‐doping amounts, x = 0.001, 0.002, 0.003, 0.004, were fabricated by powder‐in‐tube (PIT) technique. It is found that the magnetic field dependence of critical current density Jc(H) is improved for samples with Fe‐doping amounts of x = 0.001, 0.002, and 0.003 at high magnetic fields, while the Jc(H) behavior deteriorates with Fe‐doping level increasing further. X‐ray diffraction analyses manifest that a small amount of Fe‐doping has little effect on the phase composition of Bi2223/Ag tapes. Scanning electron microscopy (SEM) observations do not show an obvious difference between un‐doped and Fe‐doped samples. It is concluded that the enhanced flux pinning originates from the introduction of effective pinning centers due to Fe ions partial substitution for Cu ions.

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Section: Resultsmentioning

confidence: 99%

The Impact of Fe Doping on Jc Behavior of Bi2223/Ag Tapes under Magnetic Field

Xiao

Song

et al. 2002

phys. stat. sol. (a)

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“…Several researchers have examined the various phase transformations occurring during the synthesis of BSCCObased superconducting materials [11][12][13][14]. Most of the XRD diffraction peaks could be indexed according to the phases formed in the ternary or quaternary systems, such as Bi-SrCa, Sr-Ca-Cu, Bi-Ca-Cu, Bi-Sr-Cu, and Bi-Sr-Ca-Cu-O, as reported by Paz-Pujalt [15].…”

Section: Characterization Of the Calcined Powdermentioning

confidence: 94%

Synthesis and Characterization of Bi1.6Pb0.4Sr2Ca2Cu3O7 Superconducting Oxide by High-Energy Milling

Darsono

Imaduddin

Raju

et al. 2015

J Supercond Nov Magn

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Superconducting Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 7 was prepared by a solid-state reaction using high-energy milling for the starting materials. The effects of the sintering temperature and time on the phase evolution, microstructure, and superconducting properties were examined by thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and four-point probe resistivity measurements. High-energy milling decreased the precursor particle size to approximately 30 nm with a relatively uniform distribution of multi-compositions. Because of the mechanochemical activation for the starting materials, the reaction temperature was decreased to 750 • C due to the decreased diffusion length required for the solid-state reaction. Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 7 prepared by high-energy milling showed good superconducting properties with T c ∼ 100 K, which is superior to the same material prepared by ball milling and sol-gel routes.

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“…After similar deformation to wire diameter of 2.0 mm, this wire was flat-rolled repeatedly until the tape become a desired final thickness. After heat treatment, the transport critical current was measured by the standard DC four-probe method with a criterion of 1 at 77 K and 0 T. The BSCCO 2223 phase contents were calculated based on the XRD intensity ratios of the and the peaks [11]. The longitudinal cross sections and fracture surfaces of the reacted tapes were observed using SEM and EDS.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Characterization of Fine and Homogeneous BSCCO-2223 Precursor Powder by Spray Pyrolysis Process for PIT Process

Yoo

Kim

et al. 2005

IEEE Trans. Appl. Supercond.

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Homogeneous and fine BSCCO precursor powders were prepared by spray pyrolysis (SP) method starting from an aqueous solution of metal nitrates. The influence of solution concentration, furnace reaction temperature and types of spray on microstructure and average particle size were investigated. The synthesized precursor powders had a narrow particle size distribution and low carbon content. The reactivity of precursor powder by SP method is very high, attributed to the fine and narrow particle size distribution of precursor powders. The precursor powder by SP method promoted a very quick formation of the 2223 phase for short sintering time. The XRD result shows high possibility of reducing secondary phases such as large AEC and almost phase pure microstructure through more homogeneous reaction.

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Formation mechanism of high-Tc and critical current in (Bi,Pb)2Sr2Ca2Cu3O10/Ag tape

Cited by 86 publications

References 15 publications

The Impact of Fe Doping on Jc Behavior of Bi2223/Ag Tapes under Magnetic Field

The Impact of Fe Doping on Jc Behavior of Bi2223/Ag Tapes under Magnetic Field

Synthesis and Characterization of Bi1.6Pb0.4Sr2Ca2Cu3O7 Superconducting Oxide by High-Energy Milling

Synthesis and Characterization of Fine and Homogeneous BSCCO-2223 Precursor Powder by Spray Pyrolysis Process for PIT Process

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