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

Abstract

A superconductor is disclosed 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 a particulate 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. 7 figs.

Inventors:
; ; ;
Issue Date:
OSTI Identifier:
7233587
Patent Number(s):
5173476 A
Application Number:
PPN: US 7-252698
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; EDB-94-089033
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 3 Oct 1988
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH OXIDES; FABRICATION; TRANSITION TEMPERATURE; CALCIUM OXIDES; COPPER OXIDES; STRONTIUM OXIDES; HIGH-TC SUPERCONDUCTORS; SINTERING; ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360207 - Ceramics, Cermets, & Refractories- Superconducting Properties- (1992-)

Citation Formats

Veal, B.W., Downey, J.W., Lam, D.J., and Paulikas, A.P. 110K Bi-Sr-Ca-Cu-O superconductor oxide and method for making same. United States: N. p., 1992. Web.
Veal, B.W., Downey, J.W., Lam, D.J., & Paulikas, A.P. 110K Bi-Sr-Ca-Cu-O superconductor oxide and method for making same. United States.
Veal, B.W., Downey, J.W., Lam, D.J., and Paulikas, A.P. Tue . "110K Bi-Sr-Ca-Cu-O superconductor oxide and method for making same". United States.
@article{osti_7233587,
title = {110K Bi-Sr-Ca-Cu-O superconductor oxide and method for making same},
author = {Veal, B.W. and Downey, J.W. and Lam, D.J. and Paulikas, A.P.},
abstractNote = {A superconductor is disclosed 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 a particulate 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. 7 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {12}
}