Improvement of the superconducting properties of an infiltrated YBCO bulk superconductor by a BaCeO3 addition
✍ Scribed by A. Mahmood; S.D. Park; B.H. Jun; J.S. Youn; Y.H. Han; T.H. Sung; C.J. Kim
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 865 KB
- Volume
- 469
- Category
- Article
- ISSN
- 0921-4534
No coin nor oath required. For personal study only.
✦ Synopsis
Single grain YBa 2 Cu 3 O 7Àx (Y123) bulk superconductors with Y 2 BaCuO 5 (Y211) and various amounts of BaCeO 3 (5-45 wt.% by an increment of 10 wt.%) were fabricated by a seeded infiltration process. The addition of BaCeO 3 was found to be effective for a modification of the microstructure and an improvement of the superconducting properties. The refinement effect for Y211 particles within an entire superconducting YBa 2 Cu 3 O 7Àx (Y123) matrix was achieved by BaCeO 3 additions. The critical current density (J c ) values were increased as the BaCeO 3 contents were increased (maximum J c at 35 wt.% BaCeO 3 addition). The J c improvement by BaCeO 3 additions might be due to the microstructure modifications associated with the finely distributed Y211 and BaCeO 3 particles. With the addition of BaCeO 3 the onset T c values decreased slightly, indicating highly limited Ce substitution for Y site. It can be concluded that the BaCeO 3 addition has a beneficial effect on the morphology, the size and the distribution of the Y211 inclusions and the microstructure regarding pinning improvement.