12 - Nonlinear Nonlineardielectrics Chapter31...

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onlinear dielectrics Nonlinear dielectrics Chapter 31
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Overview of Lesson Review dielectrics ee deect cs Polarization mechanisms Ideal vs nonideal [lossy] capacitors Rise of Nonlinear dielectrics phenomena Structure polarization relationships Ferroelectricity Piezoelectricity Pyroelectricity Relaxors
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Dielectrics
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Dielectric Constants of Some Materials
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Review of Polarization Mechanisms E Electron cloud Atomic nucleus (a) A neutral atom in E = 0. Center of negative charge x C O p induced Radio Infrared Ultraviolet light Cl - H + p o + Q - Q F = Q E F p o = aQ E p + p x Cl Na + (a) E (a) p av = 0 p av 0 E (c) p' + p' E (b) Grain boundary or interface
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eal vs nonideal [real] capacitors Ideal vs nonideal [real] capacitors Ideal Nonideal In an AC circuit, the voltage and current across an “ deal” capacitor are 90 out Loss derived from resistive term, therefore there are o contributions to current ideal capacitor are 90 out
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This note was uploaded on 03/04/2010 for the course MSE 4144 taught by Professor Sigmund during the Spring '10 term at University of Florida.

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12 - Nonlinear Nonlineardielectrics Chapter31...

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