Abstract: Texture technology is one of the methods to improve the properties of piezoelectric ceramics. (Na0.5Bi0.5)0.93Ba0.07Ti1-xNbxO3(NBBT-xNb, x=0, 0.015, 0.020, 0.025, 0.030) textured ceramics with different Nb contents were prepared by template grain growth method. Their ferroelectric, dielectric properties and electric - field - induced strain ( EFIS) were studied systematically. Textured NBBT-xNb ceramics with pure phase were obtained. The texture degree initially decreases and then increases slightly with the addition of Nb content. At room temperature, the EFIS of NBBT-xNb ceramics can reach up to 0.249% at x=0, which is 60%-80% higher than that in random ones. The maximum EFIS is ~ 0. 325% at room temperature at x = 0. 015. The thermal stability can be significantly improved as well. In addition, a new dielectric anomaly was firstly observed in the NBT based ceramics. These results will be helpful for future study of NBT based ceramics.
Key words: lead- free piezoceramics; (Na0.5Bi0.5)0.93Ba0.07TiO3 ; template grain growth method; electric - field - induced strain; thermal stability