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K(Ta-0.60,Nb-0.40)O-3/K(Ta-0.40,Ta-0.60)O-3 heterolayered thin films for electrocaloric cooling device

Authors
Kim, JiwonPark, JooseokLee, Sunggap
Issue Date
Feb-2021
Publisher
KOREAN ASSOC CRYSTAL GROWTH, INC
Keywords
Potassium tantalite niobate; Electrocaloric effect; Thin film; Solgel method
Citation
JOURNAL OF CERAMIC PROCESSING RESEARCH, v.22, no.1, pp 48 - 53
Pages
6
Indexed
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF CERAMIC PROCESSING RESEARCH
Volume
22
Number
1
Start Page
48
End Page
53
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/4147
DOI
10.36410/jcpr.2021.22.1.48
ISSN
1229-9162
2672-152X
Abstract
In this study, K(Ta-0.60,Nb-0.40)O-3/K(Ta-0.40,Ta-0.60)O-3 heterolayered thin films were fabricated by spin coating method. KTN specimens were manufactured according to the number of coatings and were investigated in order to apply to cooling devices. KTN heterolayered thin films showed a polycrystalline KTN X-ray patterns with some pyrochlore phase. For the six-layer coated thin film of KTN, the values of dielectric constant, dielectric loss, remanent polarization and coercive field were 1423, 0.64, 19.94 mu C/cm(2) and 37.64 kV/cm at 28 degrees C. When a voltage of 330 kV/cm was applied to the 3 times coated KTN films, the electrocaloric property was 3 degrees C. When a voltage of 330 kV/cm was applied, the value of the electrocaloric temperature change (Delta T of the three-layer coated thin film.
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