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Magnesium Diboride: Production and Doping

Magnesium Diboride: Production and Doping. Autumn Wyda and Keirsun Crockett. Superconductor Properties. J c Critical Current T c Critical Temperature H c Critical Magnetic Field. Why Magnesium Diboride?. Low anisotropy Cheap and easy to manufacture Applications: NMR, MRI, transmission.

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Magnesium Diboride: Production and Doping

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  1. Magnesium Diboride: Production and Doping Autumn Wyda and Keirsun Crockett

  2. Superconductor Properties • Jc Critical Current • Tc Critical Temperature • Hc Critical Magnetic Field

  3. Why Magnesium Diboride? • Low anisotropy • Cheap and easy to manufacture • Applications: NMR, MRI, transmission

  4. MgB2 Production • Weighed Mg and B powders, 1:2 molar ratio • Ground mixture for 15 minutes • Pressed into 1g pellets

  5. Heat Treatments

  6. MgB4 Formation from Mg Evaporation  Nickel Foil Boxes Increased Mg:B ratio Lower Sintering Temperature Production Obstacles

  7. Pure MgB2 Experimental Alfa Aesar

  8. Conclusions for Pure MgB2

  9. Doping Mg1.2-xAxB2 • Vanadium, Titanium, Niobium • X = 0.05, 0.1, 0.15, 0.2 • Heat Treatments 1 and 7

  10. Doped Sample Analysis • Titanium formed TiB2? • Vanadium formed VB2? • Niobium did not form NbB2?

  11. Conclusions for Doped Samples

  12. Further Study • SEM analysis of microstructures • Different heat treatments on doped samples • Critical Current measurements • Wire drawing

  13. Acknowledgements The authors would like to thank the National Science Foundation and the Center for Integrating Research and Learning for making this research possible. Special thanks to Dr. Justin Schwartz, Dr. Sastry Pamidi, Dr. Ulf Trociewitz, and Jianhua Su for mentoring this project and the staff at CIRL for personal support.

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