Journal ArticleDOI
Enhanced cooling capacities of ferroelectric materials at morphotropic phase boundaries
Rami Chukka,Jun Wei Cheah,Zuhuang Chen,Ping Yang,Santiranjan Shannigrahi,Junling Wang,Lang Chen +6 more
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TLDR
In this article, the electrocaloric properties of PbZr0.52Ti0.48O3 epitaxial films and 0.7PMN-0.3PT single crystals are measured and demonstrated enhanced low temperature refrigeration at morphotropic phase boundary compositions.Abstract:
The electrocaloric properties of PbZr0.52Ti0.48O3 (PZT) epitaxial films and 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (0.7PMN-0.3PT) single crystals are measured and demonstrated enhanced low temperature refrigeration at morphotropic phase boundary compositions. The results reveal large adiabatic cooling figures in ∼260 nm PZT films (11 K in 15 V) and 200 μm thick 0.7PMN-0.3PT single crystals (2.7 K in 240 V) at Curie transition temperatures and secondary cooling peaks at lower temperatures, near critical points. This is a very useful aspect of ferroelectric cooling elements to attain effective cooling over wide range of working temperatures in solid-state devices.read more
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Electrocaloric materials for future solid-state refrigeration technologies
TL;DR: The electrocaloric effect (EC) is an adiabatic and reversible temperature change that occurs in a polar material upon application of an electric field as mentioned in this paper, and the current intensive research in EC materials has been driven by the quest for new energy efficient and environmentally friendly cooling technologies.
Journal ArticleDOI
Large electrocaloric response and high energy-storage properties over a broad temperature range in lead-free NBT-ST ceramics
TL;DR: In this article, the phase transition temperature can be reduced to room temperature by tuning the compositions of the (1−x)NBT-xSrTiOO3 material.
Journal ArticleDOI
Pyroelectric and electrocaloric materials
Xinyu Li,Sheng-Guo Lu,Xiang-Zhong Chen,Xiang-Zhong Chen,Haiming Gu,Xiaoshi Qian,Qiming Zhang +6 more
TL;DR: In this paper, the authors summarized typical properties of pyroelectric and electrocaloric materials, present figures of merit for both phenomena, examine the relationship between the pyro electric and electro-caloric effect, and also present theoretical works, experimental results, and material modifications to achieve large responses in electrocalric materials.
Journal ArticleDOI
Enhanced electrocaloric effect in lead-free BaTi1−xSnxO3 ceramics near room temperature
Zheng-Dong Luo,Dawei Zhang,Yang Liu,Yang Liu,Di Zhou,Yonggang Yao,Chenqi Liu,Brahim Dkhil,Xiaobing Ren,Xiaojie Lou +9 more
TL;DR: In this paper, the electrocaloric effect in lead-free BaTi1−xSnxO3 (BTSn, x = 0.08, 0.105, and 0.14) ferroelectric ceramics was studied by using an indirect method.
Journal ArticleDOI
Optimized electrocaloric refrigeration capacity in lead-free (1-x)BaZr 0.2 Ti 0.8 O 3 -xBa 0.7 Ca 0.3 TiO 3 ceramics
Yang Bai,Xi Han,Lijie Qiao +2 more
TL;DR: In this article, the impact of composition on the electrocaloric effect in lead-free (1−x)BaZr0.8O3−xBa0.3TiO3 ceramics, especially on the morphotropic phase boundary, was demonstrated.
References
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Cooling, heating, generating power, and recovering waste heat with thermoelectric systems.
TL;DR: Thermoelectric materials are solid-state energy converters whose combination of thermal, electrical, and semiconductor properties allows them to be used to convert waste heat into electricity or electrical power directly into cooling and heating.
Journal ArticleDOI
Recent developments in magnetocaloric materials
TL;DR: The recent literature concerning the magnetocaloric effect (MCE) has been reviewed and correlations have been made comparing the behaviours of the different families of magnetic materials which exhibit large or unusual MCE values.
Journal ArticleDOI
Giant Electrocaloric Effect in Thin-Film PbZr0.95Ti0.05O3
A. S. Mischenko,A. S. Mischenko,Qiming Zhang,Qiming Zhang,James F. Scott,James F. Scott,Roger W. Whatmore,Roger W. Whatmore,Neil D. Mathur,Neil D. Mathur +9 more
TL;DR: A giant electrocaloric effect is demonstrated in 350-nanometer PbZr0.95Ti0.05O3 films near the ferroelectric Curie temperature of 222°C, which may find application in electrical refrigeration.
Journal ArticleDOI
Large electrocaloric effect in ferroelectric polymers near room temperature.
TL;DR: It was determined that a large ECE can be realized in the ferroelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymer at temperatures above the feroelectric-paraelectric transition (above 70°C), where an isothermal entropy change of more than 55 joules per kilogram per kelvin degree and adiabatic temperature change were observed.
Journal ArticleDOI
The giant electromechanical response in ferroelectric relaxors as a critical phenomenon
TL;DR: It is shown that on approaching the critical point, both the energy cost and the electric field necessary to induce ferroelectric polarization rotations decrease significantly, thus explaining the giant electromechanical response of these relaxors.