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Spray pyrolysis process for preparing superconductive films

  • US 5,021,399 A
  • Filed: 03/10/1989
  • Issued: 06/04/1991
  • Est. Priority Date: 03/10/1989
  • Status: Expired due to Fees
First Claim
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1. A spray pyrolysis method for preparing thin superconductive film, comprising the steps of:

  • (a) preparing a spray pyrolysis solution comprising Bi,Sr,Ca and Cu metals in a solvent;

    (b) heating a substrate to a first temperature;

    (c) spraying said solution onto said heated substrate to form a film thereon;

    (d) heating said film and substrate to a second temperature of about 700°

    -825°

    C., said second temperature being higher than said first temperature;

    (e) heating said film and substrate to a third temperature of about 870°

    -890°

    C. to melt said film;

    (f) once said film and substrate reach said third temperature, further heat treating said film and substrate at a fourth temperature of about 840°

    -860°

    C.; and

    (g) cooling said film and substrate to ambient temperature.

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