Structural and electrical properties of Bi2WO6 piezoceramics prepared by solid state reaction method

Stoichiometric Bi2WO6 (BWO) piezoelectric ceramic, with round-shaped grains and a relative density of was prepared by solid state reaction method. The dielectric, resistivity, ferroelectric and piezoelectric properties of BWO were investigated. The dielectric constant and loss show strong frequency dependence with increasing temperature in BWO, which can be attributed to the contribution from the defect dipoles. These defect dipoles have significant effects on the electrical resistivity and polarization electric (P-E) hysteresis loops of unpoled and poled BWO, and also thermal depoling behavior of poled BWO. (C) 2015 Elsevier Ltd. All rights reserved.