Properties of (Pb_(0.90)Ba_(0.10))ZrO_3 Ceramics with Deficient and Excess PbO

摘要

The effects of excess PbO on the properties of perovskite (Pb_(0.90)Ba_(0.10))ZrO_3 (PBZ10) have been investigated. The PBZ10 ceramics were prepared by a conventional mixed oxide method. Excess PbO (-1.5, 1, 3, 5 and 10 wt percent) was added together with starting materials to compensate for PbO loss from evaporation during calcination and sintering. The XRD results revealed that the fraction of the orthorhombic phase has effected by PbO content. The 3 wt percent PbO excess sample exhibited the maximum value of relative permittivity at the Curie temperature, while the 1 wt percent PbO excess sample showed maximum value of piezoelectric strain coefficient d_(33) and electromechanical coupling factor k_p.