Formation of perovskite surface layers by oxidation of Cu-La-Sr alloys
The recent discovery that perovskite-type crystal structures composed of La-Cu oxides substituted with small amounts of alkaline earth cations have exceptionally high superconducting critical temperatures has stimulated much interest in these potentially important materials. The most promising material reported thus far in the literature is La/sub 2-x/Sr/sub x/CuO/sub 4/. The substitution of an alkaline earth for La appears to stabilize a tetragonal structure as apposed to the orthorhombic structure of the parent compound, La/sub 2/CuO/sub 4/. In the work reported to date, the materials were prepared either by sintering mechanical mixtures of the oxides or carbonates or by co-precipitating the oxalates or carbonates with subsequent calcining and sintering steps.
- Research Organization:
- Materials Science, Chemistry, and Chemical Technology Divisions, Argonne National Lab., Argonne, IL 60439
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6296063
- Journal Information:
- J. Electrochem. Soc.; (United States), Vol. 134:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COPPER ALLOYS
OXIDATION
LANTHANUM ALLOYS
PEROVSKITE
CRYSTAL STRUCTURE
SUPERCONDUCTIVITY
TRANSITION TEMPERATURE
STRONTIUM ALLOYS
ALKALINE EARTH METAL COMPOUNDS
CALCINATION
CARBONATES
COPPER OXIDES
COPRECIPITATION
LAYERS
MIXTURES
OXALATES
POWDERS
SINTERING
ALLOYS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBOXYLIC ACID SALTS
CHALCOGENIDES
CHEMICAL REACTIONS
COPPER COMPOUNDS
DECOMPOSITION
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FABRICATION
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
PRECIPITATION
PYROLYSIS
RARE EARTH ALLOYS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
360105* - Metals & Alloys- Corrosion & Erosion
360602 - Other Materials- Structure & Phase Studies
360603 - Materials- Properties