High piezoelectric response in [001] textured Sm3+ doped Pb(Mg1/3Nb2/3)O3–PbTiO3 ceramics

Abstract

In this work, [001] textured Sm0.025Pb0.9625(Mg1/3Nb2/3)0.74Ti0.26O3 (Sm-PMN-26PT) ceramics were synthesized by the templated grain growth method. The dielectric, piezoelectric, and electromechanical properties of untextured and textured ceramics are systematically studied. A high texture degree of 99% was obtained using 1% volume fraction of the BaTiO3 (BT) template. The textured ceramics exhibit an excellent piezoelectric coefficient d33 of 1882 pC/N at room temperature, and an extremely high d33* of 2510 pm/V is obtained. The dielectric, ferroelectric, and strain characteristics reveal that the improvement of piezoelectric properties of textured ceramics comes from the increase of dielectric constant ε33 and electrostriction coefficient Q33. Both the intrinsic response of the domain and the external contribution of the domain wall are enhanced in [001] textured ceramics, which may be the microscopic mechanism of increased piezoelectric activity. The Sm-PMN-26PT textured ceramics exhibit excellent piezoelectric properties, which are very promising for using at room temperature.