A model theory of piezo- and pyroelectricity of poly(vinylidene fluoride) electret

Abstract

Abstract Calculation of piezoelectric constants e 31 and e 33 and pyroelectric constant p 3, of poly(vinylidene fluoride) electret is made on the basis of a model theory in which spheres with the spontaneous polarization Psc are embedded in a matrix. Results are in good agreement with observed values of these constants, respectively, when the magnitude of P sc is reasonably assumed. It is to be noted that e31, e32;, e33 and p 3 are interpreted in terms of a unified simple composite model.