Paraelectricity | Wikipedia audio article
Channel: wikipedia tts
Date: 28/06/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Dielectric


00:01:14 1 Terminology
00:02:36 2 Electric susceptibility
00:05:37 2.1 Dispersion and causality
00:07:03 3 Dielectric polarization
00:08:02 3.1 Basic atomic model
00:08:07 3.2 Dipolar polarization
00:08:18 3.3 Ionic polarization
00:11:25 3.3.1 In cells
00:13:35 4 Dielectric dispersion
00:15:05 5 Dielectric relaxation
00:16:19 5.1 Debye relaxation
00:18:10 5.2 Variants of the Debye equation
00:19:58 6 Paraelectricity
00:23:40 7 Tunability
00:24:43 8 Applications
00:26:42 8.1 Capacitors
00:28:07 8.2 Dielectric resonator
00:28:16 8.3 BST thin films
00:30:34 9 Some practical dielectrics
00:31:21 10 See also
00:33:05 11 References



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SUMMARY
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A dielectric (or dielectric material) is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed in an electric field, electric charges do not flow through the material as they do in an electrical conductor but only slightly shift from their average equilibrium positions causing dielectric polarization. Because of dielectric polarization, positive charges are displaced in the direction of the field and negative charges shift in the opposite direction. This creates an internal electric field that reduces the overall field within the dielectric itself. If a dielectric is composed of weakly bonded molecules, those molecules not only become polarized, but also reorient so that their symmetry axes align to the field.The study of dielectric properties concerns storage and dissipation of electric and magnetic energy in materials. Dielectrics are important for explaining various phenomena in electronics, optics, solid-state physics, and cell biophysics.