Results 151 to 160 of about 2,525 (200)
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Giant electrocaloric effect in a molecular ceramic
Materials Horizons, 2023The electrocaloric effect (ECE) is an efficient and environmentally friendly method for solid-state refrigeration driven by an electric field.
Hao-Ran Ji +8 more
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Electrocaloric effect on graphenes
Applied Physics Letters, 2013The present Letter explores the electrocaloric effect of graphene nano-ribbons, with a longitudinal electric field and transversal magnetic field. Special features of the effect can be ruled and tuned by the applied fields as, for instance, the unusual inverse effect, created by the Landau levels.
M. S. Reis, S. Soriano
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Electrocaloric effect in ferroelectric polymers
Applied Physics A, 2012The electrocaloric effect (ECE) of poly (vinyledene fluoride–trifluoroethylene) (P(VDF–TrFE)) 55/45 mol% copolymers was directly measured, which confirms the results deduced from Maxwell relation. The adiabatic temperature change ΔT under a given electric field peaks at the ferroelectric–paraelectric (FE–PE) transition. Away from it, ECE becomes small.
S. G. Lu +4 more
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Isothermal electrocaloric effect in KCI:OH
physica status solidi (b), 1975AbstractThe entropy of a noninteracting dipole system with the equilibrium dipole moment μ ‖ 〈100〉 in a rigid cubic lattice is obtained for the external electric field E‖ [100] of arbitrary strength, taking into account the 90° tunneling. In thermostating experiments the KCI‐OH monocrystals were illuminated with light pulses of rectangular shape ...
V. Korrovits, G. Liidja, V. Mihkelsoo
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High electrocaloric effect ferroelectric ceramics
Ferroelectrics, 1989Abstract Effective ferroelectric ceramics of niobium-doped titanate-zirconate lead stannate of a high electrocaloric effect T = 2.6 K have been produced and studied. Production technology of lead scandium-tantalate PbSc.5Ta.5O3 (PST) ceramic solid solutions with operating temperature 260–295 K and maximum ΔT = 1.4–1.8 K at 20–30 kV/cm field amplitudes ...
L. A. Shebanov +3 more
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High Electrocaloric Effect in Ferroelectrics
Ferroelectrics, 2010The existing situation in prospects of application of electrocaloric effect (ECE), related to finding ferroelectrics exhibiting high values of ECE, is discussed. Besides 1st order ferroelectric-paraelectric phase transitions, which were most promising till recent time with respect to high values of ECE, there are other approaches, related to ECE in ...
E. Birks, M. Dunce, A. Sternberg
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Electrocaloric Effect: An Introduction
2013Over the last two decades the development of novel refrigeration technologies has been a priority within the scientific and industrial community. This has been due, on one hand, to the 1997 Kyoto protocol of the United Nations Framework Convention on Climate Change (UNFCCC), which held to account several countries concerning the elimination/reduction ...
Tatiana Correia, Qi Zhang
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Electrocaloric effect in PLZT ceramics
Ferroelectrics, 1986The electrocaloric effect in rhombohedral PLZT ceramics is studied as function of applied field and temperature. The results obtained are consistent with the general idea of the existence of an intermediate state of mixed polar and nonpolar regions in the interval of the diffuse phase transition.
E. Birks, L. Shebanov, A. Sternberg
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Ion Hydration and Large Electrocaloric Effect
Journal of Solution Chemistry, 2002Starting from a discussion of the grand potential change associated with introduction of ions into water, the electrocaloric effect for the system ion–surrounding water is calculated by means of this recent statistical approach to the problem of water in a high electric field.
I. Danielewicz-Ferchmin, A. R. Ferchmin
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Electrocaloric effect in BaTiO3 thin films
Journal of Applied Physics, 2009The modified transverse Ising model taking into account the four-spin exchange interaction and quantum fluctuation, as well as the mechanical constraint of the substrate, is constructed and applied to investigate the electrocaloric effect (ECE) in BaTiO3 thin films.
Hai-Xia Cao, Zhen-Ya Li
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