About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Chemistry and Physics of Interfaces
|
Presentation Title |
Grain Boundary Chemistry and Electrical Potential in BaTiO3 |
Author(s) |
Elizabeth Dickey, Seonghwan Hong |
On-Site Speaker (Planned) |
Elizabeth Dickey |
Abstract Scope |
BaTiO3 is the most common dielectric for commercial multilayered ceramic capacitors, with a trillion devices produced annually. The miniaturization of electronic devices and their use in more extreme environments (T, humidity, etc.) motivates growing interest in improving the electrical properties and stability of BaTiO3. The electrical properties are not only determined by the bulk defect chemistry, but are significantly affected by the grain boundaries. The electrical conductivity of grain boundaries can differ by several orders of magnitude with respect to that of the bulk and can provide barriers for oxygen vacancy migration. This talk will discuss experimental approaches to measuring grain boundary electrical potentials and the macroscopic conductivity and degradation behavior of BaTiO3. The experimental approach includes complementary impedance spectroscopy and scanning transmission electron microscopy to develop a holistic understanding of the local grain boundary chemistry and potential profiles. This research was funded by AFOSR under grant FA9550-19-1-0222. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Energy Conversion and Storage, |