[17a-P01-1~29] 9 Applied Materials Science (Poster)

[17a-P01-4] Microstructure and densification of (Bi_0.5Na_0.5)TiO₃ ceramics prepared by hydrothermal synthesis

〇Hinata Horikoshi¹, Hyunwook Nam¹, Yuka Takagi¹, Hajime Nagata¹ (1.Tokyo Univ. of Science)

Keywords:

lead-free piezoelectric material

(Bi_0.5Na_0.5)TiO₃ (BNT) ceramics are potential high-power piezoelectric materials because of their relatively high piezoelectricity. However, the sintering temperature of BNT ceramics is as high as 1140 °C, hence Bi volatilization is a problem. To solve this problem, in this study, we focused on the densification of pressed bulk powders by hydrothermal synthesis for further low-temperature sintering. The BNT formation process under various hydrothermal and starting material conditions will be discussed in the presentation.