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Title: Method of producing Pb-stabilized superconductor precursors and method of producing superconductor articles therefrom

Metal oxide superconductor powder precursors are prepared in an aerosol pyrolysis process. A solution of the metal cations is introduced into a furnace at 600--1,000 C for 0.1 to 60 seconds. The process produces micron to submicron size powders without the usual loss of the lead stabilizer. The resulting powders have a narrow particle size distribution, a small grain size, and are readily converted to a superconducting composition upon subsequent heat treatment. The precursors are placed in a metal body deformed to form a wire or tape and heated to form a superconducting article. The fine powders permit a substantial reduction in heat treatment time, thus enabling a continuous processing of the powders into superconducting wire, tape or multifilamentary articles by the powder-in-tube process. 3 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
27721
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; SCA: 360201; PA: EDB-95:057855; SN: 95001354430
Patent Number(s):
US 5,395,821/A/
Application Number:
PAN: 7-969,070
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 7 Mar 1995
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SUPERCONDUCTING WIRES; FABRICATION; SUPERCONDUCTORS; PRECURSOR; CERAMICS

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