A ferroelectric material is a dielectric medium that presents spontaneous electric polarization. ​By inverting the direction of applied electrical field, the direction of polarization of these materials can be inverted or changed.
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Talking about what are microferroelectric materials?
Microferrelectronics is a sub-field of electronics which relates to the study and manufacture of very small electronic designs and components which are based on ferroelectric materials.
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Piezoelectric effect in Ferroelectric materials
All the ferroelectric materials exhibit piezoelectricity.Piezoelectricity is a very broad ferroelectric application area.
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Talking about Nanogenerator it is a device that converts mechanical/thermal energy as produced by physical change into electricity and the piezoelectric property possessed by the ferroelectric polymers is the principle on which our prototype Nanogenerator work.