Fabrication of YBaCuO Superconducting Films by Aerosol Spray

Aerosol Spray 에 의한 YBaCuO 초전도 필름의 제조

  • 송명아 (한국화학연구원 무기재료연구부) ;
  • 윤민영 (한국화학연구원 무기재료연구부) ;
  • 김윤수 (한국화학연구원 무기재료연구부)
  • Published : 19901100

Abstract

High temperature superconducting films of $YBa_2Cu_3O_{7-x}$ were fabricated on the (100) single crystal faces of YSZ (yttria stabilized zirconia) and SrTi$O_3$ by aerosol spray using ultrasonic atomization. The superconducting phase was formed by a three-step process: (a) spraying of a stoichiometric solution of nitrates of yttrium, barium, and copper on heated substrates kept at 250$^{\circ}C$, (b) preheating of the sprayed films in air at 550$^{\circ}C$, and (e) sintering of the films in flowing oxygen at 950$^{\circ}C$, followed by furnace cooling. Resistances of the films were measured by the dc four-probe method and superconductivity was confirmed above the liquid nitrogen temperature.

Keywords

References

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