Influence of sintering temperature on the superconducting properties of Zn-stearate-doped MgB2 tapes

Zhaoshun Gao, Yanwei Ma, Xianping Zhang, Dongliang Wang, Huan Yang, Haihu Wen, K. Watanabe

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Correlation of phase purities, microstructure, Jc and H c2 with sintering temperature has been studied in Zn-stearate-doped MgB2/Fe tapes. All doped tapes show significant enhancements in Jc and Hc2. TEM analyses revealed that strong flux pinning centers induced by grain boundaries and crystal defects as well as carbon substitution effect are responsible for the improvement of Jc and Hc2 values. Although a high sintering temperature of 850 °C increases the grain size, improved grain connection can compensate for this disadvantage, giving the best Jc of 2.0 × 104 A cm-2 at 4.2 K and 10 T. On the other hand, tapes sintered at 900 °C have a lower Jc due to the larger grain size and more MgO impurities.

Original languageEnglish
Article number015016
JournalSuperconductor Science and Technology
Volume21
Issue number1
DOIs
Publication statusPublished - 2008 Jan 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Influence of sintering temperature on the superconducting properties of Zn-stearate-doped MgB<sub>2</sub> tapes'. Together they form a unique fingerprint.

Cite this