[15a-D62-1~8] 9.1 Dielectrics, ferroelectrics

[15a-D62-7] Effects of Mn Doping on High-Power Piezoelectric Characteristics of Ba(Zr,Ti)O₃-(Ba,Ca)TiO₃ -based Lead-Free Piezoelectric Ceramics

〇(M2)Tomoya Kamigaki¹, Hajime Nagata¹, Tadashi Takenaka¹ (1.Tokyo Univ. of Sci.)

Keywords:piezoelectric ceramics, lead-free

Ba(Zr_0.2Ti_0.8)O₃-(Ba_0.7Ca_0.3)TiO₃[BZT-BCT] based ceramics are one of leading candidates for the lead-free piezoelectric material. We tried to improve the high power piezoelectric properties by the addition of Mn ions to BZT-BCT ceramics. In 0.4Ba(Zr_0.2Ti_0.8)O₃-0.6(Ba_0.7Ca_0.3)TiO₃+yMnCO₃wt%[BZT-0.6BCT+yMn] ceramics, vibration velocity increased with increasing y. The maximum vibration velocity was achieved at y = 0.396. This is probably because the Q_m is increased by hardening by Mn addition.