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Title: Process for preparing superconducting film having substantially uniform phase development

A process for preparing a superconducting film, such as a thallium-barium-calcium-copper oxide superconducting film, having substantially uniform phase development. The process comprises providing an electrodeposition bath having one or more soluble salts of one or more respective potentially superconducting metals in respective amounts adequate to yield a superconducting film upon subsequent appropriate treatment. Should all of the metals required for producing a superconducting film not be made available in the bath, such metals can be a part of the ambient during a subsequent annealing process. A soluble silver salt in an amount between about 0.1% and about 4.0% by weight of the provided other salts is also provided to the bath, and the bath is electrically energized to thereby form a plated film. The film is annealed in ambient conditions suitable to cause formation of a superconductor film. Doping with silver reduces the temperature at which the liquid phase appears during the annealing step, initiates a liquid phase throughout the entire volume of deposited material, and influences the nucleation and growth of the deposited material.
Inventors:
 [1];  [2];  [3]
  1. (Littleton, CO)
  2. (Lakewood, CO)
  3. (Evergreen, CO)
Issue Date:
OSTI Identifier:
870211
Assignee:
Midwest Research Institute (Kansas City, MO) CHO
Patent Number(s):
US 5476837
Contract Number:
AC02-83CH10093
Research Org:
MIDWEST RESEARCH INSTITUTE
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
process; preparing; superconducting; film; substantially; uniform; phase; thallium-barium-calcium-copper; oxide; comprises; providing; electrodeposition; bath; soluble; salts; respective; potentially; metals; amounts; adequate; yield; subsequent; appropriate; treatment; required; producing; available; ambient; annealing; silver; salt; amount; weight; provided; electrically; energized; form; plated; annealed; conditions; suitable; formation; superconductor; doping; reduces; temperature; liquid; appears; step; initiates; throughout; entire; volume; deposited; material; influences; nucleation; growth; soluble salts; ambient conditions; silver salt; electrically energized; superconducting film; comprises providing; oxide superconducting; copper oxide; liquid phase; substantially uniform; process comprises; soluble salt; deposited material; annealing step; thallium-barium-calcium-copper oxide; subsequent appropriate; annealing process; potentially superconducting; electrodeposition bath; entire volume; superconductor film; appropriate treatment; conducting film; superconducting metal; uniform phase; barium-calcium-copper oxide; conducting metal; /505/205/