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

[17a-P01-3] Additive Effects of Cu-based Sintering Aid on Low-Temperature Sintering and Composition Control for (Bi_0.5Na_0.5)TiO₃ -based Ceramics

〇(M2)Jianrui Han¹, Yuka Takagi¹, Hyunwook Nam¹, Hajime Nagata¹ (1.Tokyo Univ. of Science)

Keywords:

lead-free piezoelectric ceramics,ferroelectric material

From the perspective of environmental issues, the development of lead-free piezoelectric ceramics is increasingly required. Among them, (Bi_0.5Na_0.5)TiO₃-BaTiO₃-(Bi_0.5Li_0.5)TiO₃ (BNT-BT-BLT) ceramics, which exhibit high piezoelectric properties, have attracted significant attention. In this study, NaCu_2.5Ti_4.5O₁₂ (NCT) was added to BNT-based ceramics to investigate its effects on low-temperature sintering and electrical properties. NCT was found to function as a sintering aid, forming a liquid phase that lowered the sintering temperature. Furthermore, it was observed that the addition of CuO or NCT (Sintering Aid) caused the independent precipitation of BT, which in turn induced a shift in the morphotropic phase boundary (MPB).