Dielectric and Piezoelectric Properties of (Na_0.525K_0.4425Li_0.0375)(Nb_0.9625Ta_0.0375)O₃ Ceramics Substituted with Sb

Abstract

In this study, lead-free Sb substituted (Na_0.525K_0.4425Li_0.0375)(Nb_0.9625Ta_0.0375)O₃ ceramics were synthesized by traditional solid state sintering process. The effects of Sb substitution on the dielectric and piezoelectric properties were investigated in order to develop excellent lead-free piezoelectric ceramics. The (Na_0.525K_0.4425Li_0.0375)(Nb_0.9625-xSb_xTa_0.0375)O₃ ceramics with x = 0.065 showed excellent piezoelectric properties. The piezoelectric constant (d₃₃), electromechanical coupling factor (k_p), dielectric constant (ϵ_r) and density were optimized as 193 pC/N, 50.25%, 703 and 4.48 g/cm³, respectively.

Keywords:

• Lead-free ceramic
• piezoelectric coefficient
• electromechanical coupling factor