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

A process is disclosed 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. 3 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
170482
Assignee:
Midwest Research Inst., Kansas City, MO (United States) CHO; SCA: 360201; PA: EDB-96:027973; SN: 96001517616
Patent Number(s):
US 5,476,837/A/
Application Number:
PAN: 8-209,312
Contract Number:
AC02-83CH10093
Resource Relation:
Other Information: PBD: 19 Dec 1995
Research Org:
Midwest Research Institute; National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SUPERCONDUCTING FILMS; ELECTRODEPOSITION; THALLIUM OXIDES; BARIUM OXIDES; CALCIUM OXIDES; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; DOPED MATERIALS

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