scholarly journals Electrocaloric Effect of (Bi0.5Na0.5)TiO3 Ceramics

2017 ◽  
Vol 30 (5) ◽  
pp. 284-287
Author(s):  
Jong-Dae Han ◽  
Ju-Hyun Yoo ◽  
Yeong-Ho Jeong
Keyword(s):  
Electrocaloric Effect

Adjustable negative electrocaloric effect in Pb1+xZrO3 thin films

2021 ◽  
Author(s):  
Yi Ye ◽  
Fengzhen Huang ◽  
Lin Lei ◽  
Lin Liu ◽  
Shuo Yan ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrocaloric Effect

scholarly journals A unified perturbative approach to electrocaloric effects

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Mónica Graf ◽  
Jorge Íñiguez
Keyword(s):  
External Field ◽  
Taylor Series ◽  
Physical Interpretation ◽  
Applied Field ◽  
Atomistic Simulations ◽  
Small Field ◽  
Electrocaloric Effect ◽  
Perturbative Approach ◽  
Similarities And Differences ◽  
Straightforward Interpretation

AbstractThe electrocaloric effect, that is, the temperature change experienced by an insulator upon application of an electric field, offers promising ecofriendly alternatives to refrigeration. However, the theoretical treatments of this response are mostly case specific and lack a unified picture revealing the similarities and differences among the various known effects. Here, we show that the electrocaloric effect lends itself to a straightforward interpretation when expressed as a Taylor series in the external field. Our formalism explains in a unified and simple way the most notable small-field effects reported in the literature, namely the so-called normal and inverse electrocaloric responses, corresponding to an increase or decrease of temperature under applied field, as usually found in ferroelectrics or antiferroelectrics, respectively. This helps us to clarify their physical interpretation. We then discuss in detail atomistic simulations for the prototype ferroelectric PbTiO3, explicitly evaluating subtle predictions of the theory, such as the occurrence of competing contributions to the electrocaloric response.

Room‐Temperature Symmetric Giant Positive and Negative Electrocaloric Effect in PbMg 0.5 W 0.5 O 3 Antiferroelectric Ceramic

2021 ◽  
pp. 2101176
Author(s):  
Junjie Li ◽  
Hong‐Hui Wu ◽  
Jianting Li ◽  
Xiaopo Su ◽  
Ruowei Yin ◽  
...  
Keyword(s):  
Room Temperature ◽  
Electrocaloric Effect

scholarly journals Thickness-dependent electrocaloric effect in mixed-phase Pb 0.87 Ba 0.1 La 0.02 (Zr 0.6 Sn 0.33 Ti 0.07 )O 3 thin films

2016 ◽  
Vol 374 (2074) ◽  
pp. 20160056 ◽  
Author(s):  
T. M. Correia ◽  
Q. Zhang
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
Phase Transitions ◽  
Film Thickness ◽  
Tetragonal Phase ◽  
Sol Gel ◽  
Breakdown Field ◽  
Electrocaloric Effect ◽  
Thickness Increase ◽  
Higher Temperature

Full-perovskite Pb 0.87 Ba 0.1 La 0.02 (Zr 0.6 Sn 0.33 Ti 0.07 )O 3 (PBLZST) thin films were fabricated by a sol–gel method. These revealed both rhombohedral and tetragonal phases, as opposed to the full-tetragonal phase previously reported in ceramics. The fractions of tetragonal and rhombohedral phases are found to be strongly dependent on film thickness. The fraction of tetragonal grains increases with increasing film thickness, as the substrate constraint throughout the film decreases with film thickness. The maximum of the dielectric constant ( ε m ) and the corresponding temperature ( T m ) are thickness-dependent and dictated by the fraction of rhombohedral and tetragonal phase, with ε m reaching a minimum at 400 nm and T m shifting to higher temperature with increasing thickness. With the thickness increase, the breakdown field decreases, but field-induced antiferroelectric–ferroelectric ( E AFE−FE ) and ferroelectric–antiferroelectric ( E FE−AFE ) switch fields increase. The electrocaloric effect increases with increasing film thickness. This article is part of the themed issue ‘Taking the temperature of phase transitions in cool materials’.

scholarly journals Impact of phase transition sequence on the electrocaloric effect in Pb(Nb,Zr,Sn,Ti)O3 ceramics

2017 ◽  
Vol 110 (8) ◽  
pp. 082901 ◽  
Author(s):  
Zunping Xu ◽  
Zhongming Fan ◽  
Xiaoming Liu ◽  
Xiaoli Tan
Keyword(s):  
Phase Transition ◽  
Electrocaloric Effect ◽  
Transition Sequence

Large energy-storage density and positive electrocaloric effect in xBiFeO3–(1 − x)BaTiO3 relaxor ferroelectric ceramics

2022 ◽  
Author(s):  
Hui Tang ◽  
Xiang Niu ◽  
Peng-Fei Zhao ◽  
Xin-Gui Tang ◽  
Xiao-Dong Jian ◽  
...  
Keyword(s):  
Energy Storage ◽  
Relaxor Ferroelectric ◽  
Ferroelectric Ceramics ◽  
Large Energy ◽  
Energy Storage Density ◽  
Electrocaloric Effect ◽  
Storage Density ◽  
Relaxor Ferroelectric Ceramics

Large energy storage density and big electrocaloric strength in the BiFeO3–BaTiO3 system.

scholarly journals Bipolar electrocaloric effect in Pb1−Gd (Mg1+/3Nb2–/3)O3 ceramic: Relaxor with super-dipolar glass state

2019 ◽  
Vol 162 ◽  
pp. 1-4 ◽  
Author(s):  
Adityanarayan H. Pandey ◽  
A.M. Awasthi ◽  
Surya Mohan Gupta
Keyword(s):  
Electrocaloric Effect ◽  
Glass State
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