Influence of thermal conditions on the electrocaloric effect in a multilayer capacitor based on doped BaTiO3
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URI (для ссылок/цитирований):
https://www.worldscientific.com/doi/abs/10.1142/S2010135X17500412https://elib.sfu-kras.ru/handle/2311/111329
Автор:
Bondarev, V. S.
Flerov, I. N.
Gorev, M. V.
Pogoreltsev, E. I.
Molokeev, M. S.
Mikhaleva, E. A.
Shabanov, A. V.
Es’Kov, A. V.
Коллективный автор:
Институт инженерной физики и радиоэлектроники
Кафедра теплофизики
Базовая кафедра физики твердого тела и нанотехнологий
Дата:
2017-12Журнал:
Journal of Advanced DielectricsКвартиль журнала в Scopus:
Q3Квартиль журнала в Web of Science:
без квартиляБиблиографическое описание:
Bondarev, V. S. Influence of thermal conditions on the electrocaloric effect in a multilayer capacitor based on doped BaTiO3 [Текст] / V. S. Bondarev, I. N. Flerov, M. V. Gorev, E. I. Pogoreltsev, M. S. Molokeev, E. A. Mikhaleva, A. V. Shabanov, A. V. Es’Kov // Journal of Advanced Dielectrics. — 2017. — Т. 7 (№ 6). — С. 1-9Аннотация:
We present the results of studies of thermal expansion, heat capacity, permittivity, polarization and the influence of different thermal
conditions on the intensive electrocaloric effect (ECE), TAD, in a commercial multilayer capacitor based on doped BaTiO3.
Investigations in a wide temperature range revealed one anomaly in the behavior of the physical properties at about 290 K
characteristic for the relaxors. Direct measurements showed a high reversibility of ECE under equilibrium thermal conditions. Good
agreement was found between the values of TAD determined by direct and indirect measurements at the electric field up to
15.4 kV/cm. Quasi-isothermal conditions lead, firstly, to decrease of large TAD 0.94 K obtained in adiabatic conditions under
E ¼ 308 kV/cm to 0.87 K, and, secondly, the appearance of a difference between the values of T ON and T OFF determined when
the electric field is applied and removed. Using this phenomenon and changing the frequency of the periodic electric field,
E ¼ 15:4 kV/cm, the effect of cooling was obtained equal to ½ð T ON þ T OFFÞ=2max ¼ 0:032 K. The results obtained are useful
for further development of the electrocaloric refrigeration technique without thermal switches.