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:
-
- Hinsdale, IL
- Glen Ellyn, IL
- Plainfield, IL
- Countryside, IL
- Issue Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- OSTI Identifier:
- 868161
- Patent Number(s):
- 5086034
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- 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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Works referenced in this record:
Calcination of YBa2Cu3O7−x powder
journal, November 1988
- Goretta, K. C.; Bloom, Ira; Chen, Nan
- Materials Letters, Vol. 7, Issue 5-6
Synthesis of Superconductive Oxides by Vacuum Calcination Method
journal, June 1988
- Uno, Naoki; Enomoto, Noritsugu; Tanaka, Yasuzo
- Japanese Journal of Applied Physics, Vol. 27, Issue Part 2, No. 6