Characterization of potassium-modified Li0.12Na0.88Nb0.97Sb0.03O3 lead-free piezoceramics.

Highlights: [•] K+ modified LNN-based ceramics were synthesized by using mixed oxide routes. [•] K+ ions induced a phase transition from orthorhombic to tetragonal structure. [•] Dielectric behavior above T C was discussed and followed the Curie–Weiss law. [•] A set of material constants were determined by using a resonance–antiresonance method. [•] K+ dopants make a ‘softening’ effect on LNKNS-based piezoceramics. [ABSTRACT FROM AUTHOR]