Study of the nonstoichiometry and physical properties of the Sr/sub x/Dy/sub 1-x/FeO/sub 3-y/ ferrite system
A series of samples in the Sr/sub x/Dy/sub 1-x/FeO/sub 3-y/ system (x = 0.00, 0.25, 0.50, 0.75, and 1.00) have been produced by heating the reactants to 1200/sup 0/C in air under atmospheric pressure. Mohr salt analysis shows that DyFeO/sub 3/ is a stoichiometric compound and that Fe/sup 4 +/ ions and oxygen deficiency compensate for the cation charge deficiency which is caused by substitution of Sr/sup 2 +/ at Dy/sup 3/..mu.. sites. X-ray powder diffraction assigns the compositions x = 0.00 and 0.25 to the orthorhombic system and the composition x = 0.50, 0.75, and 1.00 to the cubic system. The electrical conductivity sharply increases and the activation energy decreases with the presence of mixed iron valency. The Moessbauer spectra of the samples with x = 0.25 and 0.50 are composed of two sets of lines and a single broad peak for x = 0.75.
- Research Organization:
- Yonsei Univ., Seoul (Korea)
- OSTI ID:
- 7257246
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 73:2; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL PREPARATION
COHERENT SCATTERING
CRYSTAL STRUCTURE
DATA
DIFFRACTION
DISPERSIONS
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
EXPERIMENTAL DATA
INFORMATION
IONS
IRON COMPOUNDS
IRON OXIDES
LATTICE PARAMETERS
MIXTURES
MOESSBAUER EFFECT
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POWDERS
RARE EARTH COMPOUNDS
SCATTERING
SOLID SOLUTIONS
SOLUTIONS
STOICHIOMETRY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION