[20p-PB1-1~10] 9.1 Dielectrics, ferroelectrics

▼ [20p-PB1-5] Effect of Post-annealing temperature and time in BaTiO₃-Bi(Mg_1/2Ti_1/2)O₃-BiFeO₃ piezoelectric ceramics

〇(M2)HyunWook Nam¹, Tomoya Aizawa¹, Sangwook Kim¹, Ichiro Fujii¹, Shintaro Ueno¹, Satoshi Wada¹ (1.Univ. of Yamanashi)

Keywords:BiFeO-based ceramics, Piezoelectric ceramics, Defect dipoles

The BiFeO3-based lead free piezoelectric ceramics are expected as new candidate cause by their high Curie temeperature above 400oC. However, this ceramics has a serious problem such as the presence of charged defects. they can be created the form of defect dipoles that seriously affect the electrical properties. but this problem can by solved by quenching process. in this work, not only the effect of quenching process but also the effect of post-annealing temeperature and keeping time were investigated for BaTiO₃-Bi(Mg_1/2Ti_1/2)O₃-BiFeO₃ piezoelectric ceramics.