The influence of pelletization pressure on normal and superconducting properties of (Bi,Pb):2223 bulk system

Marconi, Daniel; Lung, C.; Pop, Alexandru

doi:10.1016/j.jallcom.2013.06.068

Cited by 17 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effects of the sintering temperature on the structural phase evolution were also investigated. The formation of a BSCCO 2223 phase is affected by many factors, such as the sintering temperature, time, oxygen partial pressure, and composition [9,[33][34][35][36]. Figure 3 presents XRD patterns of the pellets sintered at 820, 840 and 860 • C for 24 h, showing the typical peaks of BSCCO orthorhombic 2212 and tetragonal 2223 phases [10,41,42].…”

Section: Resultsmentioning

confidence: 99%

“…The sol-gel process allows a significant decrease in processing temperature. Recent studies have shown that the preparation method and its sintering temperature and time play a vital role in the evolution of the phase structure and the microstructure in polycrystalline BSCCO materials, which influence their superconducting properties significantly [31][32][33][34][35][36][37][38]. With this background, highquality Pb-doped BSCCO samples were synthesized using a citratebased solgel method and the effects of sintering temperature and time on the phase evolution and superconducting properties were examined.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of the Sintering Conditions on the Structural Phase Evolution and T C of Bi1.6Pb0.4Sr2Ca2Cu3O7 Prepared Using the Citrate sol–gel Method

Darsono

Yoon

Raju

2016

J Supercond Nov Magn

View full text Add to dashboard Cite

The effects of the sintering temperature and time on the phase evolution, microstructure and superconducting properties in a typical Pb-doped Bi-Sr-Ca-Cu-O (BSCCO) system, Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 7 , were examined systematically by X-ray diffraction (XRD), thermo gravimetricdifferential thermal analysis, scanning electron microscopy, and four-point probe resistivity measurements. The samples were prepared by the citrate based sol-gel method using their corresponding nitrates as the starting materials. The samples were sintered at different temperatures, ranging from 820 to 860 • C with different dwell-times (24-120 h). The results showed that the sintering temperature had a significant effect on the structure and superconducting transition temperature ( TC ). XRD showed that when the samples were heat treated at 550 • C, the BSCCO 2201 phase appeared, whereas peaks corresponding to the BSCCO 2112 phase were dominant at 800 • C. At 840 • C, only the peaks corresponding to the BSCCO 2212 and 2223 phases were detected with no impurities. A strong correlation was observed between the structural data and TC ; the samples sintered at 840 • C for 120 h exhibited the maximum T onset C (115.7 K).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of the Sintering Conditions on the Structural Phase Evolution and T C of Bi1.6Pb0.4Sr2Ca2Cu3O7 Prepared Using the Citrate sol–gel Method

Darsono

Yoon

Raju

2016

J Supercond Nov Magn

View full text Add to dashboard Cite

show abstract

“…However, the presence of intergrain weak links and the weak flux pinning capability in bulk materials are still drawbacks for reaching high critical current density (J c ) values in these materials [1,2]. As it is well known, the enhancement of J c is one of the most important issues for their practical applications [3][4][5][6][7][8]. As a consequence, many attempts have been performed to increase their current carrying capability.…”

Section: Introductionmentioning

confidence: 99%

“…As a consequence, many attempts have been performed to increase their current carrying capability. Some of them have reached high J c 's through solid-state techniques, such as high applied pressure [8]. On the other hand, directional solidification techniques, such as the Laser Floating Zone (LFZ) [9][10][11][12][13], or the Electrically Assisted Laser Floating Zone (EALFZ) [14,15] have produced high density samples with well oriented grains, dramatically raising electrical transport properties.…”

Section: Introductionmentioning

confidence: 99%

Physical, electrical and magnetic properties of Cr doped Bi2Sr2Ca1Cu2−xCrxOy (Bi-2212) superconductors prepared by laser floating zone technique

Gün

Özkurt

Özçelık

et al. 2017

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

The structural and magnetic properties evolution of Cr-doped Bi 2 Sr 2 CaCu 2-x Cr x O y ceramics (x= 0.0, 0.05, 0.1, and 0.25) have been investigated using XRD, SEM, DC resistivity and M-H measurements. X-ray diffraction studies have shown that all samples are mainly composed of Bi-2212 phase, indicating that Cr can be incorporated in its crystal structure. The microstructure of the highly Cr-doped samples showed that some impurity phases appear, decreasing the conductivity between the grains. T c (onset) and T c (offset) have been improved for x=0.05 Cr doping, while 0.25 Cr doped samples are not superconducting. This behavior can be associated to changes in the hole concentration and/or the magnetic nature of Cr. The magnetic properties indicate that low Cr-doping enhances the loop widths. Additionally, the critical current densities, J c , of samples have been calculated by using the Bean's critical state model. It has been found that there are important improvements in J c values between 0.2-0.9 T applied magnetic fields for 0.05 Cr doped samples.

show abstract

“…Now, among different phases of this system the three most common superconducting phases are: Bi-2201 (m = 1), Bi-2212 (m = 2) and Bi-2223 (m = 3), with Tc ~ 20, 80 and 110 K, respectively. The coexistence of these different phases and their dependence on parameters like temperature, time of sintering and calcination makes this useful system very complex [4]. It is desirable to synthesize pure 2223 phase, but this is very difficult because of its undergrowth with 2212.…”

Section: Introductionmentioning

confidence: 99%

Effects of change in concentration of lead on the properties of Bi-2223 superconductor prepared through solid state reaction.

Ghafoor¹,

Nabi²,

Abbasi³

2015

CSJ

View full text Add to dashboard Cite

Özet. Bu çalışmada, hem kurşun bulundurmayan süper iletken tabletler hem de farklı kurşun kombinasyonları bulunduran tabletler katı hal reaksiyonuyla hazırlandı. Hazırlanan örnekler X ışını toz dağılımları kullanarak (XRD), elektron mikroskobu (SEM) ve enerji dağıtıcı X ışını spektroskopisi ile taranarak karakterize edildi. Süper iletken özellikleri elektrik direnci ve kritik akım yoğunluğu transferi Jc kullanılarak incelendi. Sonuçlarımıza göre 48 saat orta derecede öğütülen kalsinasyonla hazırlanan örneğimiz ideal süper iletken geçiş ısısı Tc ve kritik akım yoğunluğu transferi Jc değerlerine sahiptir.

show abstract

The influence of pelletization pressure on normal and superconducting properties of (Bi,Pb):2223 bulk system

Cited by 17 publications

References 18 publications

Effects of the Sintering Conditions on the Structural Phase Evolution and T C of Bi1.6Pb0.4Sr2Ca2Cu3O7 Prepared Using the Citrate sol–gel Method

Effects of the Sintering Conditions on the Structural Phase Evolution and T C of Bi1.6Pb0.4Sr2Ca2Cu3O7 Prepared Using the Citrate sol–gel Method

Physical, electrical and magnetic properties of Cr doped Bi2Sr2Ca1Cu2−xCrxOy (Bi-2212) superconductors prepared by laser floating zone technique

Effects of change in concentration of lead on the properties of Bi-2223 superconductor prepared through solid state reaction.

Contact Info

Product

Resources

About