Sintering and Characterization of (Li, Sb, Ta)‎-Modified (Na, K)‎NbO3 Lead-Free Ceramics

الملخص EN

Lead-free alkaline niobate-based piezoceramics, (Na0.52K0.435Li0.045)Nb0.87Sb0.08Ta0.05O3 (abbreviated KNLNT-S8), were prepared by conventional solid-state sintering method.

The effects of sintering temperature on microstructure and piezoelectric properties of the (Li, Sb, Ta)-modified (Na, K) NbO3 were investigated.

Microstructure of the samples sintered at different temperatures was observed by scanning electron microscopy (SEM) and optical microscopy.

The KNLNT-S8 sample sintered at 1100°C possessed highest piezoelectric constant d33 and high-field piezoelectric strain coefficient d33* of 332 pC/N and 530 pm/V, respectively, with electromechanical coupling factors kp of 0.52 and kt of 0.48.