Open AccessLead zirconate (PbZrO3) embedded in natural rubber as electroactive elastomer composites
Author(s) -
Anuvat Sirivat,
Karat Petcharoen,
Yanee Pornchaisiriarun,
Chaleomwut Phansa-Ard,
Nuchnapa Tangboriboon
Publication year - 2014
Publication title -
journal of innovative optical health sciences/journal of innovation in optical health science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 24
eISSN - 1793-5458
pISSN - 1793-7205
DOI - 10.1142/s1793545814500163
Subject(s) - materials science , lead zirconate titanate , natural rubber , composite material , volume fraction , orthorhombic crystal system , ferroelectricity , elastomer , scanning electron microscope , dynamic mechanical analysis , polymer , crystal structure , dielectric , crystallography , chemistry , optoelectronics
Perovskite lead zirconate (PbZrO3) was synthesized in an orthorhombic form at a temperature below the Curie temperature, TC. The orthorhombic form is a noncentrosymmetric structure which is capable of spontaneous polarization. Fourier transform infrared (FTIR) spectra and X-ray diffraction (XRD) patterns confirm the successful synthesis of the lead zirconate; and scanning electron microscopy (SEM) micrographs indicate that PbZrO3 particles are moderately dispersed in the natural rubber (NR) matrix. Without an electrical field, the particles merely act as a ferroelectric filler, which can absorb and store additional stress. Under an electrical field, particle-induced dipole moments are generated, leading to interparticle interaction and a substantial increase in the storage modulus. At a small amount of lead zirconate particulates present in the natural rubber matrix, at a volume fraction of 0.007306, the electrical conductivity increases dramatically by nearly two orders of magnitude at the electrical frequency of 500 kHz