Effect of ZnO Nano-Oxide Addition on the Superconducting Properties of the (Bi.Pb)2223 Phase

AIP Conference Proceedings

Abd‐Shukor²

2013

Abstract. The effect of nanosized PbO additions on the superconducting properties of (Bi, Pb)-2223(PbO)x (x = 0 -0.15 wt. %) prepared by the co-precipitation method was studied. The structure and the microstructure of samples were examined by powder XRD and SEM, respectively. The transport critical current density (J c ), onset transition temperature (T c onset ) and zero resistance temperature (T c zero ) were determined by using four-probe method. It was observed that PbO additions enhanced J c for all added samples. The x = 0.05 wt. % sample showed the highest J c (19.3 and 11.3 A/cm 2 at 30 and 77 K, respectively) This study showed that the addition of PbO, as a result of existence of the effective artificial pinning, provided extra flux pinning centers in the (Bi, Pb)-2223 superconductor.

Section: Resultsmentioning

confidence: 99%

Effect of nanosized PbO on the electrical transport properties of (Bi1.6Pb0.4)Sr2Ca2Cu3O10 superconductor

AIP Conference Proceedings

Abd‐Shukor²

2013

“…Because the range between x and l is large, it is interesting to investigate the effect of particle with different size between the two lengths, on the transport current density of the superconductor. Nanoparticles such as ZnO [9], g-Fe 2 O 3 [10], NiFe 2 O 4 [6], and Al 2 O 3 [11] added to (Bi,Pb)-2223 showed improvement in the transport properties.…”

Section: Introductionmentioning

confidence: 96%

Effect of nanoparticles with different size on the transport critical current density of Bi1.6Pb0.4Sr2Ca2Cu3O10 superconductor

Abd‐Shukor

AIP Conference Proceedings

Agail

2014

In general, for a nanoparticle to act as a pinning center, the size L should be larger than the coherence length, x and smaller than the penetration depth, λ. In this paper we compared the effects of different nano-sized particles (where x < L < λ), MgO (20 and 40 nm) versus ZnO (6 and 30 nm) on the transport critical current density of the Bi-based superconductors. All nanoparticle added samples showed higher transport critical current density, J c compared with the non-added samples. In Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O 10 (MgO) x , the 20 nm MgO added samples showed a higher J c compared with the 40 nm MgO added samples. The 6 nm ZnO added samples also showed higher J c compared to the 30 nm added samples. These results showed that the size of flux pinning center is important in enhancing J c and particle with size closer to the coherence length showed higher transport critical current density.

“…The introduction of nano-sized particle into (Bi,Pb)-2223 matrix has generated great interest to provide extra flux pinning centers because this method is easily controlled and efficient to enhance . Nanoparticles such as NiFe 2 O 4 [2],, ZnO [9] and Al 2 O 3 [10] have been added into (Bi,Pb)-2223. These reports showed improvement in and .…”

Section: Introductionmentioning

confidence: 99%

Transport Critical Current Density and Flux Pinning Enhancement in Nano-Sized PbO and HfO2 Added (Bi1.6Pb0.4)Sr2Ca2Cu3O10 Superconductor

Abd‐Shukor

2015

AMR

A comparative study on the effect of PbO (10-30 nm) and HfO2 (60-80 nm) additions on the superconducting properties of (Bi1.6Pb0.4)Sr2Ca2Cu3O10 ((Bi,Pb)-2223) superconductor in the bulk form was carried out. The structure and the microstructure of prepared samples were examined by powder XRD and SEM, respectively. The transition temperature Tc and critical current density Jc was determined by standard dc four-probe method. SEM micrographs showed a homogeneous distribution of Pb and Hf in the samples. It was observed that PbO and HfO2 additions enhanced Jc for all added samples. Jc was the highest for x= 0.05 wt. % of PbO (1130 mA/cm2 at 77 K and 1930 mA/cm2 at 30 K) and HfO2 (900 mA/cm2 at 77 K and 1760 mA/cm2 at 30 K) addition. This study showed that the addition of PbO and HfO2 nanopowder provided extra flux pinning centers in the (Bi, Pb)-2223. PbO with smaller particle size showed higher Jc compared with HfO2 which has a larger particle size.