Abstract
0.2PZN–0.8PZT ceramics with pure perovskite structure were prepared by the two-step method with the addition of 0–1.5 wt.% WO 3 and their piezoelectric properties were investigated. The WO 3 addition influences the lattice structure and W 6+ will replace B-site ions of perovskite, which will lead to the decrease of the lattice constant. Compared to the increase of the dielectric constant ( ɛ) and mechanical quality factor ( Q m), the values of coercive electric field ( E c), remnant polarization ( P r), electromechanical coupling factor ( K p), and piezoelectric constant ( d 33) decrease with increasing WO 3 addition. The composition with 1.0 wt.% of WO 3 addition on 0.2PZN–0.8PZT ceramics exhibits excellent piezoelectric properties, showing great promise as practical materials for high power piezoelectric devices.
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