Calcination and solid state reaction of ceramic-forming components to provide single-phase superconducting materials having fine particle size
Patent
·
OSTI ID:868161
- Hinsdale, IL
- Glen Ellyn, IL
- Plainfield, IL
- Countryside, IL
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".
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5086034
- OSTI ID:
- 868161
- Country of Publication:
- United States
- Language:
- English
Calcination of YBa2Cu3O7−x powder
|
journal | November 1988 |
Synthesis of Superconductive Oxides by Vacuum Calcination Method
|
journal | June 1988 |
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calcination
solid
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provide
single-phase
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fine
particle
size
improved
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single
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earth
carbonate
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heating
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124
alkali earth
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ceramic material
particularly suitable
copper oxide
improved method
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single phase
precursor powder
superconducting materials
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fine particle
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ceramic mater
/505/252/501/
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/