Phase transitions and ferroelectric properties of lead ferroniobate
Journal Article
·
· Inorg. Mater. (Engl. Transl.); (United States)
OSTI ID:6293271
The purpose of this work was to determined the value of spontaneous polarization accurately and to obtain additional information about phase transitions in perovskite lead ferroniobate, in particular, about the effect on the electric characteristics of the ceramic. The measured values of the spontaneous polarization of PbFe/sub 0.5/Nb/sub 0.5/O/sub 3/ agree with the theoretical calculations; they are significantly higher than assumed previously, and comparable to those for P/sub 5/PbFe/sub 0.5/Ta/sub 0.5/O/sub 3/. In studying the electrophysical properties of PbFe/sub 0.5/Nb/sub 0.5/O/sub 3/ it is necessary to take into account their strong dependence on the specific conductivity, which in its turn depends on the conditions under which the ceramic is prepared. The results of dielectric and pyroelectric measurements as well as the study of the electrical conductivity, dielectric hysteresis lopps, and EPR spectra confirmed the existence of a transition in PbFe/sub 0.5/Nb/sub 0.5/O/sub 3/ between two ferroelectric phases in the region 355-360 K. This transition can significantly affect the electrophysical characteristics of the ceramic.
- Research Organization:
- Rostov-on-Don State Univ. (USSR)
- OSTI ID:
- 6293271
- Journal Information:
- Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 24:2; ISSN INOMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ANNEALING
CERAMICS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
DIELECTRIC PROPERTIES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPIN RESONANCE
FERROELECTRIC MATERIALS
HEAT TREATMENTS
IRON COMPOUNDS
IRON OXIDES
LEAD COMPOUNDS
LEAD OXIDES
MAGNETIC RESONANCE
NIOBATES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POLARIZATION
PYROELECTRIC EFFECT
REFRACTORY METAL COMPOUNDS
RESONANCE
TANTALATES
TANTALUM COMPOUNDS
TANTALUM OXIDES
TRANSITION ELEMENT COMPOUNDS
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ANNEALING
CERAMICS
CHALCOGENIDES
COMPARATIVE EVALUATIONS
DIELECTRIC PROPERTIES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPIN RESONANCE
FERROELECTRIC MATERIALS
HEAT TREATMENTS
IRON COMPOUNDS
IRON OXIDES
LEAD COMPOUNDS
LEAD OXIDES
MAGNETIC RESONANCE
NIOBATES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POLARIZATION
PYROELECTRIC EFFECT
REFRACTORY METAL COMPOUNDS
RESONANCE
TANTALATES
TANTALUM COMPOUNDS
TANTALUM OXIDES
TRANSITION ELEMENT COMPOUNDS