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

• This work explored how to get dense Bi2WO6 ceramic by solid state reaction method.
• The electric properties of unpoled and poled Bi2WO6 ceramics were investigated.
• Defect dipoles have obvious effects on the electrical properties of BWO ceramic.

Stoichiometric Bi2WO6 (BWO) piezoelectric ceramic, with round-shaped grains and a relative density of ∼96%, 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.

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