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

Patent ·
OSTI ID:869778
 [1];  [1];  [2]
  1. Knoxville, TN
  2. Oak Ridge, TN
+ Show Author Affiliations
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.degree.-1000.degree. 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.
Research Organization:
LOCKHEED MARTIN ENRGY SYST INC
DOE Contract Number:
AC05-84OR21400
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
Patent Number(s):
US 5395821
OSTI ID:
869778
Country of Publication:
United States
Language:
English

References (7)

Preparation of the High- T c Phase of Bi-Sr-Ca-Cu-O Superconductor journal August 1988
Stabilisation of 110 K superconducting phase in BiSrCaCuO Pb substitution journal January 1989
Preparation of single-phase 2-2-2-3 Bi(Pb)-Sr-Ca-Cu-O high-temperature superconductor using spray drying journal October 1990
Composition Dependence on the Superconducting Properties of Bi-Pb-Sr-Ca-Cu-O journal February 1989
Single High- T c Phase Region of the Bi-Pb-Sr-Ca-Cu-O System journal July 1989
A New High- T c Oxide Superconductor without a Rare Earth Element journal February 1988
Direct Preparation of Fine Powders of the 80 K Superconducting Phase in the Bi-Ca-Sr-Cu-O System by Spray Pyrolysis journal July 1989

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