Kinetic electrocaloric effect and giant net cooling of lead-free ferroelectric refrigerants

Journal Article · Sun Nov 14 23:00:00 EST 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3511342· OSTI ID:21537939

Yang, Bai ^[1]; Guangping, Zheng; Sanqiang, Shi ^[1]

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1. Department of Mechanical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong)

The electrocaloric effect of BaTiO{sub 3} multilayer thick film structure was investigated by direct measurement using differential scanning calorimeter. The samples show a giant electrocaloric effect of 0.89 J/g under E=176 kV/cm, which also depends on the varying rate of applied field, following a general power-law relation. Based on the large net-cooling (0.37 J/g) resulting from the difference in the varying rates of rising and falling fields, the kinetic electrocaloric effect provides a solution for the design of refrigeration cycle in ferroelectric microrefrigerator.

• OSTI ID: 21537939
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 10 Vol. 108; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALORIMETERS
CALORIMETRY
CERAMICS
DESIGN
DIELECTRIC MATERIALS
ELECTRIC CHARGES
ELECTRICAL PROPERTIES
FERROELECTRIC MATERIALS
FILMS
FLUIDS
LAYERS
MATERIALS
MEASURING INSTRUMENTS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLARIZATION
REFRIGERANTS
TEMPERATURE DEPENDENCE
THERMOELECTRIC PROPERTIES
THIN FILMS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WORKING FLUIDS