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110K Bi-Sr-Ca-Cu-O superconductor oxide and method for making same

Patent ·
OSTI ID:868608
 [1];  [2];  [3];  [1]
  1. Downers Grove, IL
  2. Joliet, IL
  3. Orland Park, IL
+ Show Author Affiliations

A superconductor consisting of a sufficiently pure phase of the oxides of Bi, Sr, Ca, and Cu to exhibit a resistive zero near 110K resulting from the process of forming a mixture of Bi.sub.2 O.sub.3, SrCO.sub.3, CaCO.sub.3 and CuO into aparticulate compact wherein the atom ratios are Bi.sub.2, Sr.sub.1.2-2.2, Ca.sub.1.8-2.4, Cu.sub.3. Thereafter, heating the particulate compact rapidly in the presence of oxygen to an elevated temperature near the melting point of the oxides to form a sintered compact, and then maintaining the sintered compact at the elevated temperature for a prolonged period of time. The sintered compact is cooled and reground. Thereafter, the reground particulate material is compacted and heated in the presence of oxygen to an elevated temperature near the melting point of the oxide and maintained at the elevated temperature for a time sufficient to provide a sufficiently pure phase to exhibit a resistive zero near 110K.

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 5173476
OSTI ID:
868608
Country of Publication:
United States
Language:
English

References (4)

Electron microscopy on the Tc = 110 K (midpoint) phase in the system Bi2O3–SrO–CaO–CuO journal April 1988
High-Resolution Electron Microscopy of Modulated Structure in the New High- T c Superconductors of the Bi-Sr-Ca-Cu-O System journal March 1988
A New High- T c Oxide Superconductor without a Rare Earth Element journal February 1988
High- T c Phase Promoted and Stabilized in the Bi, Pb-Sr-Ca-Cu-O System journal June 1988

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