electrocaloric effect


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electrocaloric effect

[i¦lek·trō·kə¦lȯr·ik i′fekt]
(solid-state physics)
A temperature change in certain crystals caused by alteration of the permanent polarization by application of an external electric field.
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Yang et al., "Colossal roomerature electrocaloric effect in ferroelectric polymer nanocomposites using nanostructured barium strontium titanates," ACS Nano, vol.
The temperature variation of the PZT ceramics sample due to electrocaloric effect for external electric field change of 1kV/mm is not more then 3 K [18].
Electrocaloric effect in some perovskite ferroelectric ceramics and multilayer capacitors.
[26] investigated the electrocaloric effect of the P(VDF-TrFE-CFE) terpolymer (62.5/29/8.5 mol%) with a blended P(VDF-TrFE) (55/45 mol%) copolymer.
The electrocaloric effect is very small in the majority of ferroelectric materials, in comparison with thermal capacity multiplied with temperature variations [21], leading to the assumption which is
We will show that by enhancing the polarization "randomness" in the ferroelectric polymers, a large electrocaloric effect (ECE) can be obtained in these polymers.
Their topics include measuring nucleation and growth processes, analyzing the evolution of surface roughness, modeling thin film deposition processes based on real-time observation, phase transition in colloidal crystal thin films, thin film growth for thermally unstable noble-metal nitrides by reactive magnetron sputtering, electronic properties and adsorption behavior of thin films with polar character, understanding substrate plasticity and buckling of thin films, the electrocaloric effect in ferroelectric polymer films, and network behavior in thin films and nanostructure growth dynamics.
Examples include electron tunneling, the electrocaloric effect, and the thermoelastic effect.
Cooling by the electrocaloric effect (ECE) employs the adiabatic temperature change of specific materials under the application of an electric field.
Electrocaloric effect (ECE) is the physical phenomenon that occurs in ferroelectric materials causing change in their temperature under applied electric field [1-5].
The first term in the parenthesis is known as the pyroelectric effect (the quantity of [partial derivative][P.sub.r]/[partial derivative]T has the meaning of pyroelectric coefficient), whereas the second one is known as the electrocaloric effect (variations of the dielectric permittivity rather than temperature).
Several solid-state cooling phenomena are the subject of active research including the Peltier effect, electron tunneling, the magnetocaloric effect, the electrocaloric effect, and the thermoelastic effect.