Тип публикации: статья из журнала
Год издания: 2022
Идентификатор DOI: 10.1016/j.jallcom.2022.167032
Ключевые слова: calorimetry, electrocaloric, ferroelectrics, phase diagrams, thermodynamic modeling
Аннотация: Using the sixth-order free energy expansion of the Landay thermodynamic potential, T − E phase diagrams and the electrocaloric effect (ECE) in solid solutions (1-x)Pb(Ni1∕3Nb2∕3)O3-xPbTiO3 (PNN-PT) were studied under an electric field along the crystallographic directions [001], [101] and [111]. The composition of the samples, tempПоказать полностьюerature range, as well as magnitude and direction of the electric field significantly affect the sequence of phase transitions, stability of various crystalline phases and electrocaloric properties. Direct measurements of the intensive ECE in the 0.8PNN-0.2PT compound were carried out by the method of adiabatic calorimetry at electric field strength E = 6 kV/cm. The large electrocaloric coefficient ΔT∕ΔE = 10 μK ⋅ cm/kV indicates that this compound and other PNN-PT solutions are promising for application as solid-state refrigerants. © 2022 Elsevier B.V.
Журнал: Journal of Alloys and Compounds
Выпуск журнала: Vol. 927
Номера страниц: 167032
ISSN журнала: 09258388
Издатель: Elsevier Ltd