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Effect of nano-Y-ZrO2 addition on the microstructure and critical current density of MgB2 superconductors

Journal Article


Abstract


  • Polycrystalline MgB2 samples with 0, 5, 10, and 20wt% nano-Y-ZrO2 (YSZ) powder addition were prepared by short time, as little as several minutes, or long time in-situ reaction process. The phases, microstructures and flux pinning behaviors were characterized using X-ray diffractometry (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM) and Magnetic Measurements. Results indicated that nano-YSZ particles included in MgB2 grains. Samples doped with 10wt% YSZ powders showed new record of critical current density Jc as high as l × 106 and 4 × 106 A/cm2 in low magnetic fields at 30 and 20 K, respectively. However, the Jc drops faster compared to that made by long time sintering samples. It is proposed that the improved Jc in low fields was due to the enhanced density of the sample, which was caused by the YSZ nano-particle inclusion.

Publication Date


  • 2004

Citation


  • Yao, Q. W., Wang, X. L., Li, A. H., Dou, S. X., & Munroe, P. R. (2004). Effect of nano-Y-ZrO2 addition on the microstructure and critical current density of MgB2 superconductors. International Journal of Nanoscience, 3(4-5), 563-569. doi:10.1142/s0219581x04002383

Scopus Eid


  • 2-s2.0-10644241938

Start Page


  • 563

End Page


  • 569

Volume


  • 3

Issue


  • 4-5

Abstract


  • Polycrystalline MgB2 samples with 0, 5, 10, and 20wt% nano-Y-ZrO2 (YSZ) powder addition were prepared by short time, as little as several minutes, or long time in-situ reaction process. The phases, microstructures and flux pinning behaviors were characterized using X-ray diffractometry (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM) and Magnetic Measurements. Results indicated that nano-YSZ particles included in MgB2 grains. Samples doped with 10wt% YSZ powders showed new record of critical current density Jc as high as l × 106 and 4 × 106 A/cm2 in low magnetic fields at 30 and 20 K, respectively. However, the Jc drops faster compared to that made by long time sintering samples. It is proposed that the improved Jc in low fields was due to the enhanced density of the sample, which was caused by the YSZ nano-particle inclusion.

Publication Date


  • 2004

Citation


  • Yao, Q. W., Wang, X. L., Li, A. H., Dou, S. X., & Munroe, P. R. (2004). Effect of nano-Y-ZrO2 addition on the microstructure and critical current density of MgB2 superconductors. International Journal of Nanoscience, 3(4-5), 563-569. doi:10.1142/s0219581x04002383

Scopus Eid


  • 2-s2.0-10644241938

Start Page


  • 563

End Page


  • 569

Volume


  • 3

Issue


  • 4-5