Published

2006-07-01

Fabricación y caracterización de cintas superconductoras de alta temperatura crítica.

Manufacturing and characterization of superconducting tapes of high critical temperature.

Keywords:

Materiales superconductores, Cintas superconductoras, compuestos BSCC-2223, método OPIT. (es)
Superconducting Material, Superconducting tapes, BSCCO- 2223 compounds, OPIT method. (en)

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Authors

  • Mónica López Grupo de Superconductividad y Nuevos Materiales, Departamento de Física, Facultad de Ciencias, Universidad Nacional de Colombia
  • Alvaro Mariño Grupo de Superconductividad y Nuevos Materiales, Departamento de Física, Facultad de Ciencias, Universidad Nacional de Colombia

A partir del compuesto superconductor (Bi0,8Pb0,2)2Sr2 - Ca2Cu3O10+γ (BSCCO-2223) se fabricaron cintas superconductoras de BSCCO-2223 usando el método OPIT (oxide power-in-tube) utilizando diferentes tratamientos térmicos. Al someter las cintas a altas temperaturas se obtuvieron densidades de corriente crítica relativamente altas, con relación al material “bulk”, de Jc ≈ 10 A/cm2 a 77 K y B = 0 T , y una alta conectividad entre granos, atribuida a una fusión parcial del compuesto. La morfología y composición del material superconductor empaquetado (cintas) fue analizado por Microscopia electrónica de barrido (SEM) y Energía Dispersiva de rayos X (EDX) respectivamente, observándose una composición similar a la nominal y mostrando una buena conectividad entre los granos, responsable de sus propiedades eléctricas.

From the superconductor compound (Bi0,8Pb0,2)2Sr2 - Ca2Cu3O10+γ (BSCCO-2223), BSCCO - 2223 superconducting tapes were prepared using the oxide power-in-tube (OPIT) method, using different thermal treatments. By submitting the tapes to high temperatures, high current densities relative to bulk material Jc ≈ 10 A/cm2 - 77 K andB = 0 T and high grain connectivity were obtained, which could be attributed to partial fusion of the compound. Morphology and composition of the packed material were studied by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray spectroscopy (EDX) respectively, observing a composition close to nominal and good grain connectivity, responsible of their electrical properties.

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