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Title: Calcination and solid state reaction of ceramic-forming components to provide single-phase superconducting materials having fine particle size

Abstract

An improved method for the preparation of single phase, fine grained ceramic materials from precursor powder mixtures where at least one of the components of the mixture is an alkali earth carbonate. The process consists of heating the precursor powders in a partial vacuum under flowing oxygen and under conditions where the partial pressure of CO.sub.2 evolved during the calcination is kept to a very low level relative to the oxygen. The process has been found particularly suitable for the preparation of high temperature copper oxide superconducting materials such as YBa.sub.2 Cu.sub.3 O.sub.x "123" and YBa.sub.2 Cu.sub.4 O.sub.8 "124".

Inventors:
 [1];  [2];  [3];  [4]
  1. Hinsdale, IL
  2. Glen Ellyn, IL
  3. Plainfield, IL
  4. Countryside, IL
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
868161
Patent Number(s):
US 5086034
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
calcination; solid; reaction; ceramic-forming; components; provide; single-phase; superconducting; materials; fine; particle; size; improved; method; preparation; single; phase; grained; ceramic; precursor; powder; mixtures; mixture; alkali; earth; carbonate; process; consists; heating; powders; partial; vacuum; flowing; oxygen; conditions; pressure; evolved; kept; level; relative; found; particularly; suitable; temperature; copper; oxide; yba; cu; 123; 124; alkali earth; fine grained; partial vacuum; conducting material; oxide superconducting; ceramic material; particularly suitable; copper oxide; improved method; particle size; ceramic materials; superconducting material; partial pressure; single phase; precursor powder; superconducting materials; precursor powders; powder mixture; powder mixtures; fine grain; fine particle; process consists; ceramic mater; /505/252/501/

Citation Formats

Balachandran, Uthamalingam, Poeppel, Roger B, Emerson, James E, and Johnson, Stanley A. Calcination and solid state reaction of ceramic-forming components to provide single-phase superconducting materials having fine particle size. United States: N. p., 1992. Web.
Balachandran, Uthamalingam, Poeppel, Roger B, Emerson, James E, & Johnson, Stanley A. Calcination and solid state reaction of ceramic-forming components to provide single-phase superconducting materials having fine particle size. United States.
Balachandran, Uthamalingam, Poeppel, Roger B, Emerson, James E, and Johnson, Stanley A. Wed . "Calcination and solid state reaction of ceramic-forming components to provide single-phase superconducting materials having fine particle size". United States. https://www.osti.gov/servlets/purl/868161.
@article{osti_868161,
title = {Calcination and solid state reaction of ceramic-forming components to provide single-phase superconducting materials having fine particle size},
author = {Balachandran, Uthamalingam and Poeppel, Roger B and Emerson, James E and Johnson, Stanley A},
abstractNote = {An improved method for the preparation of single phase, fine grained ceramic materials from precursor powder mixtures where at least one of the components of the mixture is an alkali earth carbonate. The process consists of heating the precursor powders in a partial vacuum under flowing oxygen and under conditions where the partial pressure of CO.sub.2 evolved during the calcination is kept to a very low level relative to the oxygen. The process has been found particularly suitable for the preparation of high temperature copper oxide superconducting materials such as YBa.sub.2 Cu.sub.3 O.sub.x "123" and YBa.sub.2 Cu.sub.4 O.sub.8 "124".},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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