The effects of microstructure on the electrocaloric properties of Pb(Zr, Sn, Ti)O/sub 3/ ceramics
Journal Article
·
· Ferroelectrics; (United States)
When an electric field is applied to a dielectric material under adiabatic conditions there is a resultant change in temperature, a phenomenon known as the electrocaloric effect. Compositions in the Pb(Zr,Sn,Ti)O/sub 3/ system (PZST) have several phases of nearly equal free energy, allowing antiferroelectric (AFE) to ferroelectric (FE) and paraelectric (PE) to ferroelectric (FE) transitions to occur. Data are presented for electrocaloric measurements on AFE materials in the vicinity of the Curie point. The effect of microstructure is reported, and experimental values are related to dielectric properties through thermodynamic relations. Culmination of this work resulted in the largest electrocaloric effect (2.6/sup 0/K) measured to date for coarse grain material in the PZST system.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign
- DOE Contract Number:
- AC02-78ER04679; AC02-76ER01198
- OSTI ID:
- 6596861
- Journal Information:
- Ferroelectrics; (United States), Journal Name: Ferroelectrics; (United States) Vol. 37; ISSN FEROA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
CERAMICS
CRYSTAL STRUCTURE
DIELECTRIC MATERIALS
ELECTRIC FIELDS
EVALUATION
LEAD COMPOUNDS
MATERIALS
MICROSTRUCTURE
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
STANNATES
TIN COMPOUNDS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
CERAMICS
CRYSTAL STRUCTURE
DIELECTRIC MATERIALS
ELECTRIC FIELDS
EVALUATION
LEAD COMPOUNDS
MATERIALS
MICROSTRUCTURE
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
STANNATES
TIN COMPOUNDS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS