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Title: Synthesis and microstructure of the 2223 phase (Bi{sub 2.0}Sr{sub 2.0}Ca{sub 2.0}Cu{sub 3.0}O{sub x}) in the (Bi,Pb)-Sr-Ca-Cu-O system obtained from freeze dried precursors

Abstract

Amorphous precursor powders for Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2}Ca{sub 2.2}Cu{sub 3}O{sub x} and Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2}Ca{sub 2.0}Cu{sub 3}0{sub x} (2223) were prepared by a freeze-drying process incorporating a splat-freezing step. The critical parameters affecting the drying process are discussed. The freeze-dried powders have high reactivity and led to essentially phase pure 2223 phase formation in 12 hr. The microstructure of the 2223 shows fine coherent particles of 2201 in the matrix. The grain boundaries of the 2223 grains appear to be clean, leading to good intergrain contact between 2223 grains. It was shown that both lead content and oxygen partial pressure affected liquid-phase formation. Lead content affected dissolution of the 2212 phase into the liquid phase from which the 2223 high-{Tc} superconducting phase is formed.

Authors:
; ; ;  [1];  [2]
  1. Univ. of Pittsburgh, PA (United States). Dept. of Materials Science and Engineering
  2. Argonne National Lab., IL (United States). Energy Technology Division
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
43015
Report Number(s):
CONF-9310224-
ISBN 0-87339-271-X; TRN: IM9521%%179
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Book
Resource Relation:
Conference: Materials Week `93, Pittsburgh, PA (United States), 17-21 Oct 1993; Other Information: PBD: 1994; Related Information: Is Part Of Processing of long lengths of superconductors; Balachandran, U. [ed.] [Argonne National Lab., IL (United States)]; Collings, E.W. [ed.] [Battelle Columbus Division, Columbus, OH (United States)]; Goyal, A. [ed.] [Oak Ridge National Lab., TN (United States)]; PB: 371 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH OXIDES; SYNTHESIS; MICROSTRUCTURE; LEAD OXIDES; STRONTIUM OXIDES; CALCIUM OXIDES; COPPER OXIDES; LEAD; METALLURGICAL EFFECTS; EXPERIMENTAL DATA

Citation Formats

Krishnaraj, P, Lelovic, M, Deis, T A, Eror, N G, and Balachandran, U. Synthesis and microstructure of the 2223 phase (Bi{sub 2.0}Sr{sub 2.0}Ca{sub 2.0}Cu{sub 3.0}O{sub x}) in the (Bi,Pb)-Sr-Ca-Cu-O system obtained from freeze dried precursors. United States: N. p., 1994. Web.
Krishnaraj, P, Lelovic, M, Deis, T A, Eror, N G, & Balachandran, U. Synthesis and microstructure of the 2223 phase (Bi{sub 2.0}Sr{sub 2.0}Ca{sub 2.0}Cu{sub 3.0}O{sub x}) in the (Bi,Pb)-Sr-Ca-Cu-O system obtained from freeze dried precursors. United States.
Krishnaraj, P, Lelovic, M, Deis, T A, Eror, N G, and Balachandran, U. Sat . "Synthesis and microstructure of the 2223 phase (Bi{sub 2.0}Sr{sub 2.0}Ca{sub 2.0}Cu{sub 3.0}O{sub x}) in the (Bi,Pb)-Sr-Ca-Cu-O system obtained from freeze dried precursors". United States.
@article{osti_43015,
title = {Synthesis and microstructure of the 2223 phase (Bi{sub 2.0}Sr{sub 2.0}Ca{sub 2.0}Cu{sub 3.0}O{sub x}) in the (Bi,Pb)-Sr-Ca-Cu-O system obtained from freeze dried precursors},
author = {Krishnaraj, P and Lelovic, M and Deis, T A and Eror, N G and Balachandran, U},
abstractNote = {Amorphous precursor powders for Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2}Ca{sub 2.2}Cu{sub 3}O{sub x} and Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2}Ca{sub 2.0}Cu{sub 3}0{sub x} (2223) were prepared by a freeze-drying process incorporating a splat-freezing step. The critical parameters affecting the drying process are discussed. The freeze-dried powders have high reactivity and led to essentially phase pure 2223 phase formation in 12 hr. The microstructure of the 2223 shows fine coherent particles of 2201 in the matrix. The grain boundaries of the 2223 grains appear to be clean, leading to good intergrain contact between 2223 grains. It was shown that both lead content and oxygen partial pressure affected liquid-phase formation. Lead content affected dissolution of the 2212 phase into the liquid phase from which the 2223 high-{Tc} superconducting phase is formed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {12}
}

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