About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Advances in Dielectric Materials and Electronic Devices
|
Presentation Title |
New Insights into Bismuth Sodium Titanate Ferroelectric Ceramics |
Author(s) |
Zhongming Fan, Clive Randall |
On-Site Speaker (Planned) |
Zhongming Fan |
Abstract Scope |
Bismuth sodium titanate (BNT) is one of the most popular lead-free piezoelectric ceramics. The functional potentials of BNT-based materials are widely appreciated, yet the defect chemistry and polarization dynamics are far from being fully elaborated. Oxygen vacancies and bismuth/sodium vacancies are the predominant point defects. The oxygen vacancy could lead to considerable ionic conduction, thereby the significant resistance degradation under DC bias. The bismuth vacancies, on the other hand, play crucial role in the phase transition behaviors. In the presentation, the defect chemistry and its impact on the polarization dynamics will be systematically discussed. |