Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5438976 | Ceramics International | 2017 | 5 Pages |
Abstract
Single domain GdBCO bulk superconductors have been fabricated by the top-seeded infiltration and growth process (Gd+011 TSIG) with solid phase compositions of (1-x)(Gd2O3+1.2BaCuO2)+xLi2CO3, (x=0, 0.04, 0.08, 0.10, 0.12, 0.16Â wt%). The effect of Li2CO3 doping on the growth morphology, microstructure, levitation force, trapped field and critical temperature (Tc) of single domain GdBCO bulks have also been investigated based on these samples. The results show that the single-domain GdBCO bulks can be fabricated when x is in the range of 0-0.16Â wt%. The size and distribution of Gd211 particles are not influenced by the Li2CO3 doping in the samples. The Tc of the samples decrease from 92.5Â K (x=0Â wt%) to 89.5Â K (x=0.16Â wt%) when x increases. The decreasing trend of Tc was caused by the substitution of Li+ on Cu2+ site in the GdBCO crystal. Both of the levitation forces and trapped fields of the samples increase first and then decrease with the increase of x; both of the largest levitation force of 38.5Â Nï¼77Â Kï¼0.5Â Tï¼ and the largest trapped field of 0.31Â Tï¼77Â Kï¼0.5Â Tï¼ are obtained in the sample when x=0.10Â wt%. These results show that appropriate Li doping is an effective way to enhance the flux pinning force and the other physical properties of GdBCO bulk superconductors fabricated by the Gd+011 TSIG method.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Peng-Tao Yang, Wan-Min Yang, Yakupu Abula, Xiao-Qing Su, Ling-Ling Zhang,