About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
Presentation Title |
Grain Boundary Segregation and Impedance in Dielectric Ceramics |
Author(s) |
Elizabeth Dickey, Andrew Aumen, Seonghwan Hong |
On-Site Speaker (Planned) |
Elizabeth Dickey |
Abstract Scope |
The grain boundary chemistry in dielectric materials can induce local variations in electrostatic potential, which can dominate the overall conductivity of polycrystalline materials. This talk will discuss grain boundary segregation phenomena in important electronic ceramics, focusing on the temperature-dependent contributions to the electronic conductivity. A combination of impedance spectroscopic analyses and transmission electron microscopy measurements of chemistry and local electrostatic potential and used to understand segregation phenomena in BaTiO3 co-doped for improved reliability. This work was supported by AFOSR grant number FA9550-19-1-0222. |