Superconductivity in Bi–Pb–Sr–Ca–Cu–O ceramics with YBCO as additive

Arlina, A.; Halim, S. A.; Kechik, Mohd Mustafa Awang; Chen, Soo Kien

doi:10.1016/j.jallcom.2015.04.133

Cited by 16 publications

(6 citation statements)

References 13 publications

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“…Figure 2 displays the surface SEM images of the BPSCCO samples. It is obviously observed that there were the formations of plate-like and needle-like grains in all samples, those might imply the presence of the Bi-2223 and Bi-2212 phases, respectively [16]. While all samples show the randomly distributed plate-like morphology, the average size of the Bi-2223 grains were found to be increased from ~ 4.5 to ~9.5 and ~9.8 m, which was comparable to the calculations obtained from the XRD analyses.…”

Section: Resultsmentioning

confidence: 85%

A comparative study of enhancements of critical temperature in Bi-Pb-Sr-Ca-Cu-O superconductors

Tran

Duong

et al. 2017

MaP

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Abstract:In this work, the effects of sintering temperature and Na subtitution on zero critical temperature (T c,0 ) in Bi-Pb-Sr-Ca-Cu-O superconductors were investigated. The Bi 1.6 Pb 0.4 Sr 2 Ca 2-x Na x Cu 3 O 10+ bulk samples with x = 0.00 and 0.05 (BPSCCO) were prepared by using the solid state reaction technique at elevated sintering temperatures of 840 and 850 o C. To examine the improvements of structural and superconducting properties of the BPSCCO samples, the X-ray diffraction (XRD), scanning electronic microscope (SEM) and DC resistance versus temperature (R-T) measurements were carried out. The experimental findings exhibit a co-existence of the high T c (Bi-2223) and low T c (Bi-2212) phases in all samples. The estimated volume fraction of the Bi-2223 phase was increased from 71.4 to 75.7%, and the average size of the Bi-2223 grains was enlarged from 4.5 to 9.8 m as changing the sample preparation conditions. The improved connectivities between the Bi-2223 grains were also obtained by quantitively analyzing the relation between T c,0 and residual resistance ratio (RRR). These improvements were likely to be reasons for the enhancements of T c,0 in the BPSCCO samples.

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Section: Resultsmentioning

confidence: 85%

A comparative study of enhancements of critical temperature in Bi-Pb-Sr-Ca-Cu-O superconductors

Tran

Duong

et al. 2017

MaP

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“…It should be noted that all Y123/TiO 2 composite samples showed weak peaks and broadening of the inter-granular peaks when compared to the pure sample. This indicated field penetration (due to granular quality) as well as hysteretic losses between grains [35]. The values of the inter-granular current density J c (T pm ) for all samples were calculated using the Bean model equation J c (T pm ) = H/(ab) 0.5 [36].…”

Section: Alternating Current Susceptibility (Acs) Measurementmentioning

confidence: 99%

Orthorhombic YBa2Cu3O7−δ Superconductor with TiO2 Nanoparticle Addition: Crystal Structure, Electric Resistivity, and AC Susceptibility

Barood,

Kechik,

Tee

et al. 2023

Coatings

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This article reports the effect of a nanoscale addition of TiO2 on the structure and superconducting parameters of the high-temperature superconductor YBa2Cu3O7-δ (Y123). Polycrystalline compounds of Y123 with different percentages of TiO2, x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0, were fabricated using the thermal treatment method. An analysis using X-ray diffraction confirmed the formation of Y123 phases for all composite samples. Field-emission scanning electron microscopy (FESEM) analysis revealed the growth of grain size and decrease in porosity, with a sign of partial melting of grains for the samples with TiO2 addition. The magnetic and electric transport properties were investigated using AC susceptibility measurement and the four-probe method, respectively. It was observed that the superconducting transition temperature, Tc-onset, for a pure sample determined by ACS and 4PP was 95.6 K and 95.4 K, respectively. These values were found to decrease with the addition of TiO2, while the superconducting transition (∆Tc) improved with TiO2 addition except for the sample at x = 0.2 wt.%, which showed the broadest transition width. The sharpest superconducting transition (∆Tc) was observed for the sample at x = 1.0 wt.%, indicating that the addition of TiO2 nanoparticles is expected to serve as artificial pinning centres and strengthen the connection among the grains in the Y123 ceramic.

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“…Impurity phases and structural inhomogeneities at the grain boundaries of Y123 are some reasons for this weak link behavior to occur [6]. According to previous studies, the introduction of nanoparticles in the YBCO system plays an important role as an effective flux pinning centre [2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Microstructural, Phase Formation, and Superconducting Properties of Bulk YBa2Cu3Oy Superconductors Grown by Infiltration Growth Process Utilizing the YBa2Cu3Oy + ErBa2Cu3Oy + Ba3Cu5O8 as a Liquid Source

et al. 2021

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The infiltration growth (IG) process is well-known as the most established technique consisting of Y2BaCuO5 (Y211) precursor powders and liquid phases toward the fabrication of bulk YBa2Cu3Oy (Y123) superconductor for high field industrial applications. We have reported the fabrication of Y123 bulks using this technique at various ratios of liquid phase source. In this study, the use of liquid phase source toward the infiltration growth of bulk Y123 superconductors at different ratios of Y123 and ErBa2Cu3Oy (Er123) mixed with Ba3Cu5O8 (Y035) was investigated to control the Y211 secondary phase content in bulk Y123 samples. The liquid phase content was optimized by varying the mass. The sample fabricated using Y123 liquid phase (Y1Er0) showed the onset of critical temperature Tc-onset = 91.85 K. Tc-onset slightly decreased with the addition of Er123. Microstructure analysis revealed a uniform distribution of Y211 secondary phase particles in the Y123 matrix. The Y1Er0 sample had the smallest of Y211 particle size among the samples with average size of 0.992 μm. The formation of this smaller-sized Y211 particles with uniform distributions that act as an effective pinning center, had improved the critical current density, Jc of the sample Y1Er0 at 77 K with H//c-axis having the highest Jc 54.15 kA/cm2 and 11.45 kA/cm2 in self-field and 2 T, respectively. The binary mixed of rare earth superconductors (Y123 + Er123) used in the liquid phase could be used to further improve the superconducting properties of Y123 single grains.

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Superconductivity in Bi–Pb–Sr–Ca–Cu–O ceramics with YBCO as additive

Cited by 16 publications

References 13 publications

A comparative study of enhancements of critical temperature in Bi-Pb-Sr-Ca-Cu-O superconductors

A comparative study of enhancements of critical temperature in Bi-Pb-Sr-Ca-Cu-O superconductors

Orthorhombic YBa2Cu3O7−δ Superconductor with TiO2 Nanoparticle Addition: Crystal Structure, Electric Resistivity, and AC Susceptibility

Microstructural, Phase Formation, and Superconducting Properties of Bulk YBa2Cu3Oy Superconductors Grown by Infiltration Growth Process Utilizing the YBa2Cu3Oy + ErBa2Cu3Oy + Ba3Cu5O8 as a Liquid Source

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