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
- 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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Related Subjects
/505/252/501/
123
124
alkali
alkali earth
calcination
carbonate
ceramic
ceramic mater
ceramic material
ceramic materials
ceramic-forming
components
conditions
conducting material
consists
copper
copper oxide
cu
earth
evolved
fine
fine grain
fine grained
fine particle
flowing
found
grained
heating
improved
improved method
kept
level
materials
method
mixture
mixtures
oxide
oxide superconducting
oxygen
partial
partial pressure
partial vacuum
particle
particle size
particularly
particularly suitable
phase
powder
powder mixture
powder mixtures
powders
precursor
precursor powder
precursor powders
preparation
pressure
process
process consists
provide
reaction
relative
single
single phase
single-phase
size
solid
suitable
superconducting
superconducting material
superconducting materials
temperature
vacuum
yba
123
124
alkali
alkali earth
calcination
carbonate
ceramic
ceramic mater
ceramic material
ceramic materials
ceramic-forming
components
conditions
conducting material
consists
copper
copper oxide
cu
earth
evolved
fine
fine grain
fine grained
fine particle
flowing
found
grained
heating
improved
improved method
kept
level
materials
method
mixture
mixtures
oxide
oxide superconducting
oxygen
partial
partial pressure
partial vacuum
particle
particle size
particularly
particularly suitable
phase
powder
powder mixture
powder mixtures
powders
precursor
precursor powder
precursor powders
preparation
pressure
process
process consists
provide
reaction
relative
single
single phase
single-phase
size
solid
suitable
superconducting
superconducting material
superconducting materials
temperature
vacuum
yba