Superconductors

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Superconductors

  1. 1. Presented By: Rohit Kumar 1101216103
  2. 2. WHAT IS SUPERCONDUCTIVITY??     For some materials, the resistivity vanishes at some low temperature: they become superconducting. Superconductivity is the ability of certain materials to conduct electrical current with no resistance. Thus, superconductors can carry large amounts of current with little or no loss of energy. Type I superconductors: pure metals, have low critical field Type II superconductors: primarily of alloys or intermetallic compounds.
  3. 3. MEISSNER EFFECT When you place a superconductor in a magnetic field, the field is expelled below TC. B T >Tc B T < Tc Magnet Superconductor Currents i appear, to cancel B. i x B on the superconductor produces repulsion.
  4. 4. A superconductor displaying the MEISSNER EFFECT Superconductors have electronic and magnetic properties. That is, they have a negative susceptibility, and acquire a polarization OPPOSITE to an applied magnetic field. This is the reason that superconducting materials and magnets repel one another. If the temperature increases the sample will lose its superconductivity and the magnet cannot float on the superconductor.
  5. 5. Record TC versus Year Discovered 180 HgBa2Ca2Cu2O8 Pressure 160 HgBa2Ca2Cu2O8 120 TC (K) 140 Tl-Ba-Ca-Cu-O Bi2Sr2Ca2Cu3O8 100 YBa2Cu3O7 80 60 La-Sr-Cu-O 40 20 NbN Nb3Ge Hg 0 1900 1910 1920 1930 1940 1950 Year 1960 1970 La-Ba-Cu-O 1986 1980 1990 2000
  6. 6. APPLICATIONS Superconducting Magnetic Levitation  Medical(Magnetic Resonance Imaging)  Power  Particle Accelerators( like SSC) 
  7. 7. APPLICATIONS: Power The cable configuration features a conductor made from HTS wires wound around a flexible hollow core. Liquid nitrogen flows through the core, cooling the HTS wire to the zero resistance state. The conductor is surrounded by conventional dielectric insulation. The efficiency of this design reduces losses. Superconducting Transmission Cable From American Superconductor
  8. 8. APPLICATIONS: Superconducting Magnetic Levitation The track are walls with a continuous series of vertical coils of wire mounted inside. The wire in these coils is not a superconductor. As the train passes each coil, the motion of the superconducting magnet on the train induces a current in these coils, making them electromagnets. The electromagnets on the train and outside produce forces that levitate the train and keep it centered above the track. In addition, a wave of electric current sweeps down these outside coils and propels the train forward. The Yamanashi MLX01MagLev Train
  9. 9. FUTURE APPLICATIONS SOLAR POWER GENERATION  HIGH EFFCIENCY WIND TURBINES  ENERGY STORAGE DEVICES 
  10. 10. ANY QUERIES??

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