Abstract
The alkaline niobate-based perovskite ceramics (Li,Na,K)(Nb,Ta,Sb)O3 has been regarded as a new candidate of lead-free piezoelectric materials due to its excellent piezoelectric properties. In this study, Li0.02(Na0.55K0.45)0.98(Nb0.77Ta0.18Sb0.05)O3 (abbreviated as LNKNTS) piezoelectric ceramics were fabricated by a conventional solid-state reaction method at various calcinations temperature and then, their dielectric and piezoelectric properties were investigated. At the calcinations temperature of 870°C and sintering temperature of 1140°C, the optimum values of density = 4.736g/cm3, kp = 0.423, Qm = 65, ϵr = 1545 and d33 = 256 pC/N, were obtained, respectively. Taking into consideration above physical properties, it is considered that this composition is applicable to lead-free haptic piezoelectric actuators.
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