High-Efficient Method for Introducing Nanometer Y2Ba 4 CuNbO x Flux Pinning Centers in Single-

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• 作者：Jiawei Li ; Wanmin Yang ; Miao Wang ; Yuxia Guo…
• 关键词：High ; temperature superconductors ; TSIG ; Flux pinning center ; Single ; domain YBCO bulk
• 刊名：Journal of Superconductivity Incorporating Novel Magnetism
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：28
• 期：6
• 页码：1725-1728
• 全文大小：988 KB
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• 作者单位：Jiawei Li (1)
  Wanmin Yang (1)
  Miao Wang (1)
  Yuxia Guo (1)
  Zhongling Feng (1)
  
  1. School of Physics and Information Technology, Shaanxi Normal University, Xi’an, Shaanxi, 710062, China
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Superconductivity, Superfluidity and Quantum Fluids
  Magnetism and Magnetic Materials
  Condensed Matter
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1557-1947

文摘

Single-domain YBa₂Cu₃O_{7?em class="EmphasisTypeItalic">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.