Skip to main content Accessibility help

Relation Between the Characteristics of Powder and Microstructure; Properties of Ceramics for YBa2Cu2Ox Superconductors

  • Meiyu Zhao (a1), Chengen Li (a1), Xingyun Jin (a1), Yeming Huang (a1), Enji Zhou (a1), Huanyao Ni (a1), Yaoming Qu (a1), Xiangyun Song (a1) and Wenjun Wu (a1)...


Four kinds of YBa2Cu2Ox (YBCO) superconducting powders with different particle sizes, shapes and different amounts of twins have been prepared in this work. The density, grain sizes, XRD of phase composition, configuration of twins of the ceramics have been investigated. The relation between the characteristics of YBCO powders and the microstructure, current density of the bulk materials are also discussed. In contrast to the YBCO powder prepared by solid state method, the YBCO powders through the improved coprecipitat ion approach have less impurities, smaller particle size and much more amounts of twins, as well as the sintered pellets show a higher density, an orthorhombic single phase, and moreover, the pellets have finer grain boundaries and well developed twins. As a result these samples exhibit current densities (about 1500 A/cm2) higher than those prepared by solid state method. Using BaOx instead of BaCO3 as the starting material, a more dense bulk YBCO ceramics with orthorhombic single phase and Jc (about 1,000 A/cm2) can have also been fabricated by solid state mat hod.



Hide All
1 Yan, M.F., Meterial Sciesce and Engineering, B1, 119129 (1988)
2 Pandey, R.K. etc., Jour of Superconductivity Vol. 1, No.l., 4552 (1988)
3 Jin, S. etc.,Appl.Phys. Letters, Vol.52, No.24,20742076 (1988) 2074–20764.


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed