Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629280 | Journal of the European Ceramic Society | 2016 | 8 Pages |
Abstract
Here, we reported a high electric field-induced strain value of 0.34% (Smax/Emax = 901 pmVâ1) under a low electric field of 3.7 kV/mm as well as a large d33 (â¼418 pC/N) in the (1âx)(K0.45Na0.55)(Nb1âySby)O3 -xBi0.5Na0.5Zr1âzHfzO3 ceramics with x = 0.035, y = 0.04, and z = 0.75, which is mainly ascribed to the involvement of R-T phase boundary as well as optimized compositions (Hf/Zr). We investigated the relationships among composition, phase boundary, and electrical properties through (1âx)(K0.45Na0.55)(Nb1âySby)O3 -xBi0.5Na0.5Zr1âzHfzO3 ceramics. The R-T phase boundary is constructed in the ceramics with 0.035 â¤Â x â¤Â 0.05, 0.04 â¤Â y â¤Â 0.08, and 0 â¤Â z â¤Â 1.0. Meanwhile, the highest piezoelectric coefficient of d33 â¼Â 442 pC/N were obtained for x = 0.0375, y = 0.04, and z = 0.15 due to the coexistence of R and T phases. Both dielectric constant and remanent polarization can gain the most excellent values for R-T, which is responsible for the enhanced piezoelectricity. We believe that such an investigation can promote the electrical properties of (K, Na)NbO3-based ceramics and then provide practical applications.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Hong Tao, Jiagang Wu,