Synthesis and properties of YBa2Cu3O7-δ – Y2Ba4CuWO10.8 superconducting composites |
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Authors: | Ond?ej Jankovský Filip Anton?ík Tomá? Hlásek Vladimír Plechá?ek David Sedmidubský ?těpán Huber Michal Lojka Vilém Bart?něk |
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Affiliation: | 1. Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic;2. CAN SUPERCONDUCTORS s.r.o., Ringhofferova 66, 251 68, Kamenice, Czech Republic |
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Abstract: | YBa2Cu3O7-δ (YBCO) is a well-known high-temperature superconductor. However, its critical current density and thus maximum trapped magnetic field can be improved significantly by introducing the secondary phases (artificial pinning centers). In this contribution, we successfully prepared YBCO single-grain bulks with Y2Ba4CuWO10.8 phase serving as a source of pinning centers. This phase was prepared by solid-state reaction and further refined by milling. In the next step single-grain YBCO bulks with homogeneously distributed Y2Ba4CuWO10.8 were prepared by top-seeded melt growth. Precursors as well as the final product were characterized by XRD, SEM and EDS. The phase composition of YBCO bulks containing Y2Ba4CuWO10.8 was analyzed using Rietveld analysis. Thermal stability of YBCO bulk was studied by STA. Furthermore, PPMS was used to study electrical resistivity and critical current density. Bulk superconducting properties such as levitation force and trapped field ability were also measured. |
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Keywords: | YBCO Y-2411 phase Bulk Composites Pinning |
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