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A Novel Top‐Seeded Infiltration Growth Technique for Fabricating Y–Ba–Cu–O Single‐Grain Superconductor Nano‐Composites
Author(s) -
Li GuoZheng,
Dong Lei,
Deng XiangYun
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13736
Subject(s) - materials science , superconductivity , nanometre , nano , composite material , infiltration (hvac) , grain size , magnetization , magnet , microstructure , magnetic field , condensed matter physics , electrical engineering , engineering , physics , quantum mechanics
Top‐seed infiltration and growth technique ( TSIG ) is proposed to fabricate Y–Ba–Cu–O ( YBCO ) single‐grain superconductor nano‐composites, in which a solid source composition of nano‐Y 2 O 3 + BaCuO 2 and a liquid source composition of Y 2 O 3 + 10BaO + 16CuO are employed. As can be seen, this novel technique uses just one source of precursor powder of BaCuO 2 , so it is more simplified and efficient. Microstructural observation indicates that fine Y 2 BaCuO 5 (Y‐211) inclusions with a size from dozens of nanometers to about one hundred nanometers are successfully introduced in YBa 2 Cu 3 O 7− x (Y‐123) superconducting matrix, which can act as more effective pinning centers for improving the bulk performance. Superconducting property measurement shows that, a maximum trapped field of 0.36044 T is present at the center of the sample after magnetization by a permanent magnet ( B = 0.5 T). These results prove that our proposed TSIG technique is a practical method for fabricating YBCO bulk superconductor nano‐composites with high performance.