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(Bi, Pb).sub.2, Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x superconductor and method of making same utilizing sinter-forging

Patent ·
OSTI ID:871897
 [1];  [1];  [2]
  1. Downers Grove, IL
  2. Woodridge, IL
+ Show Author Affiliations

A (BiPb).sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x (Bi223) superconductor with high J.sub.c, phase purity, density and mechanical strength is formed from Bi2223 powder which is synthesized from a mixture of Bi.sub.2 O.sub.3, PbO, SrCO.sub.3, CaCo.sub.3 and CuO. The mixture is milled, then dried and calcined to synthesize the Bi2223 powder with the desired phase purity. The calcination is performed by heating the dried mixture for 50 hours at 840.degree. C. The partially synthesized powder is then milled for 1-4 hours before calcining further for another 50 hours at 855.degree. C. to complete the synthesis. After calcination, the Bi2223 powder is cold pressed to a predetermined density and sinter forged under controlled temperature and time to form a Bi2223 superconductor with the desired superconducting properties.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL
DOE Contract Number:
W-31109-ENG-38
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 5821201
OSTI ID:
871897
Country of Publication:
United States
Language:
English

References (6)

Composition and superconductivity in Bi-Sr-Ca-Cu-O and substituted systems journal May 1989
The specific heat of the single-phase (Bi, Pb)2Sr2Ca2Cu3O10+y superconductor journal April 1989
High Pressure Studies of the Superconducting Transition in (Bi, Pb)2Sr2Ca2Cu3O10 journal January 1989
High T C superconductors—composite wire fabrication journal July 1987
Alignment of grains in Bi 1.6 Pb 0.4 Sr 2 Ca 2 Cu 3 O x by hot deformation journal April 1993
Sinter-forged (Bi, Pb) 2 Sr 2 Ca 2 Cu 3 O x superconductors journal September 1993

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