Abstract
Single-domain YBa2Cu3O7−δ (YBCO) superconductors with different additions of Nb2O5 have been fabricated by a modified top seeded infiltration growth (TSIG) process. The growth morphology, microstructure and levitation force were investigated in details. The experimental results reveal that Nb2O5 can react with precursor powders in the TSIG process and finally form nanometer Y2Ba4CuNbO x (YNb2411) particles which can act as effective flux pinning centers. The content addition of Nb2O5 has sensitive effect on microstructure and superconductive property of YBCO bulks The levitation force increases firstly from 30 to 36 N and then reduces down to 21 N with the increasing of Nb2O5 additions from 0.1 to 0.9 wt% and 1.5 wt%. These results indicate a high-efficient method to improve the properties of YBCO bulks.
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Acknowledgments
The authors acknowledge the funding support of the National Natural Science Foundation of China (Nos. 51342001, 51167016), the Keygrant Project of Chinese Ministry of Education (No. 311033), Research Fund for the Doctoral Program of Higher Education of China (No. 20120202110003), the Fundamental Research Funds for the Central Universities (Nos. GK201305014, GK201503023), and the Outstanding Doctoral Thesis Foundation Project of Shaanxi Normal University (Nos. X2011YB08, X2012YB05).
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Li, J., Yang, W., Wang, M. et al. High-Efficient Method for Introducing Nanometer Y2Ba 4 CuNbO x Flux Pinning Centers in Single-Domain YBa2Cu3O7−δ Bulk Superconductors by TSIG Process. J Supercond Nov Magn 28, 1725–1728 (2015). https://doi.org/10.1007/s10948-015-3008-7
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DOI: https://doi.org/10.1007/s10948-015-3008-7