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Variation of MgB2 growth mode and enhancement of critical current density by instantaneously 800 °C-triggered low-temperature sintering

Journal Article


Abstract


  • Instantaneous high temperature improved the low-temperature sintering efficiency of the un-doped MgB2 superconductor, and the MgB2 was rapidly synthesized at 600 °C for only 2 h. In addition to the refinement of MgO impurity particles, the sudden high temperature induced defects within the MgB2 grains, e.g. twinning crystal, and the Jc performance is therefore significantly enhanced, about 2.2 × 103 A·cm− 2 at 4 T for bulk sample. Differed from the two-dimensional nucleation growth mode of the MgB2 grains in the high-temperature sintered un-doped sample, the low-temperature sintered MgB2 grains accord with the dislocation growth mechanism, relying on the thermal-stress-triggered twinning crystal.

Publication Date


  • 2016

Citation


  • Cai, Q., Liu, Y., Guo, Q., Ma, Z., & Li, H. (2016). Variation of MgB2 growth mode and enhancement of critical current density by instantaneously 800 °C-triggered low-temperature sintering. Scripta Materialia, 124, 184-188. doi:10.1016/j.scriptamat.2016.07.019

Scopus Eid


  • 2-s2.0-84978776063

Web Of Science Accession Number


Start Page


  • 184

End Page


  • 188

Volume


  • 124

Abstract


  • Instantaneous high temperature improved the low-temperature sintering efficiency of the un-doped MgB2 superconductor, and the MgB2 was rapidly synthesized at 600 °C for only 2 h. In addition to the refinement of MgO impurity particles, the sudden high temperature induced defects within the MgB2 grains, e.g. twinning crystal, and the Jc performance is therefore significantly enhanced, about 2.2 × 103 A·cm− 2 at 4 T for bulk sample. Differed from the two-dimensional nucleation growth mode of the MgB2 grains in the high-temperature sintered un-doped sample, the low-temperature sintered MgB2 grains accord with the dislocation growth mechanism, relying on the thermal-stress-triggered twinning crystal.

Publication Date


  • 2016

Citation


  • Cai, Q., Liu, Y., Guo, Q., Ma, Z., & Li, H. (2016). Variation of MgB2 growth mode and enhancement of critical current density by instantaneously 800 °C-triggered low-temperature sintering. Scripta Materialia, 124, 184-188. doi:10.1016/j.scriptamat.2016.07.019

Scopus Eid


  • 2-s2.0-84978776063

Web Of Science Accession Number


Start Page


  • 184

End Page


  • 188

Volume


  • 124