Synthesis of Y2BaCuO5 nano-whiskers by a solution blow spinning technique and their successful introduction into single-grain, YBCO bulk superconductors

Rotta, Maycon; Namburi, Devendra Kumar; Shi, Yunhua; Pessoa, Alexsander Lourenço; Carvalho, Cristiano; Durrell, John; Cardwell, D. A.; Zadorosny, Rafael

doi:10.1016/j.ceramint.2018.11.068

Cited by 32 publications

(11 citation statements)

References 37 publications

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“…The improvement of the current densities within the foam struts will be the main challenge for the future development of superconducting foam samples, and a key to this will be an improvement of the texture achieved. For this purpose, the recent developments concerning the generic seed crystals [52], the IG-process [31,37], the pre-treatment of the 211 powders [53,54] and chemical doping to improve texture [55,56] will have to be applied to the fabrication of foam samples. Nevertheless, our first results are promising, so thus we may discuss possible applications of the foam samples to set directions and goals for the coming improvements.…”

Section: Resultsmentioning

confidence: 99%

Superconducting YBCO Foams as Trapped Field Magnets

et al. 2019

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Superconducting foams of YBa 2 Cu 3 O y (YBCO) are proposed as trapped field magnets or supermagnets. The foams with an open-porous structure are light-weight, mechanically strong and can be prepared in large sample sizes. The trapped field distributions were measured using a scanning Hall probe on various sides of an YBCO foam sample after field-cooling in a magnetic field of 0.5 T produced by a square Nd-Fe-B permanent magnet. The maximum trapped field (TF) measured is about 400 G (77 K) at the bottom of the sample. Several details of the TF distribution, the current flow and possible applicatons of such superconducting foam samples in space applications, e.g., as active elements in flux-pinning docking interfaces (FPDI) or as portable strong magnets to collect debris in space, are outlined.

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Section: Resultsmentioning

confidence: 99%

Superconducting YBCO Foams as Trapped Field Magnets

et al. 2019

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“…By adding 20% BSCCO to the PVP solution, a large increase in morphological defects was observed due to the low viscosity of the solution and the lower evaporation of the solvent present in high concentration [17]. To avoid morphological imperfections caused by the low volatility of the solution due to the presence of water, acetates as precursors in a solution composed of a mixture of acids and ethanol were used [27]. However, the obtained YBCO fibers were entangled and highly irregular.…”

Section: Resultsmentioning

confidence: 99%

CaFe2O4 ferrite nanofibers via solution blow spinning (SBS)

et al. 2020

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CaFe2O4 nanofibers were successfully synthesized via solution blow spinning (SBS), and the influences of heat-treatment on morphological, microstructural, magnetic, and optical properties of the nanofibers were evaluated. In the synthesis process, stoichiometric amounts of iron and calcium nitrates were dissolved in an aqueous solution containing polyvinylpyrrolidone (PVP) and, after that, hybrid nanofibers (PVP/precursors) were produced by SBS. The hybrid nanofibers were calcined and then subjected to microstructural, morphological, and magnetic characterizations. The results evidenced that the fibers presented the crystalline nature of the single-phase CaFe2O4, with a crystallite size of 32.7 and 34.4 nm for the samples calcined at 800 and 1000 °C, respectively. The CaFe2O4 fibers calcined at 600 and 800 °C presented a homogeneous morphology, without beads, and mean diameters of 521 and 427 nm, respectively. The results also revealed nanofibers with low band gaps of approximately 1.98 eV and characteristics of soft magnetic materials.

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“…Thus, electrospinning [ 85 , 86 , 87 ] and solution-blow spinning [ 88 , 89 ] have completely overrun the template approach, enabling the growth of longer and homogeneous HTSc nanowire fabrics, from which individual pieces can easily be cut off using FIB [ 72 , 90 ]. Furthermore, the nanowire fabrics themselves have interesting electric and magnetic properties [ 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 ], which may lead to specific applications which are not possible with other types of HTSc materials.…”

Section: Discussionmentioning

confidence: 99%

Fabrication of Superconducting Nanowires Using the Template Method

Koblischka

Koblischka-Veneva

2021

Nanomaterials

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The fabrication and characterization of superconducting nanowires fabricated by the anodic aluminium oxide (AAO) template technique has been reviewed. This templating method was applied to conventional metallic superconductors, as well as to several high-temperature superconductors (HTSc). For filling the templates with superconducting material, several different techniques have been applied in the literature, including electrodeposition, sol-gel techniques, sputtering, and melting. Here, we discuss the various superconducting materials employed and the results obtained. The arising problems in the fabrication process and the difficulties concerning the separation of the nanowires from the templates are pointed out in detail. Furthermore, we compare HTSc nanowires prepared by AAO templating and electrospinning with each other, and give an outlook to further research directions.

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Synthesis of Y2BaCuO5 nano-whiskers by a solution blow spinning technique and their successful introduction into single-grain, YBCO bulk superconductors

Cited by 32 publications

References 37 publications

Superconducting YBCO Foams as Trapped Field Magnets

Superconducting YBCO Foams as Trapped Field Magnets

CaFe2O4 ferrite nanofibers via solution blow spinning (SBS)

Fabrication of Superconducting Nanowires Using the Template Method

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