| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces in Functional Materials: Fundamental Structure-Property-Performance Relationships
|
| Presentation Title |
Effect of Electrode Composition and Potential on Moisture Incorporation and Degradation in Dielectrics and Piezoelectrics |
| Author(s) |
John R. McGarrahan, Elizabeth Dickey |
| On-Site Speaker (Planned) |
John R. McGarrahan |
| Abstract Scope |
The time-dependent properties of dielectric and piezoelectric materials in humid environments is an important performance metric, as humidity-related degradation can dominate device lifetime in some applications. This research aims to understand the effects of proton incorporation in such environments by measuring surface exchange and diffusion kinetics of H+ in commercially relevant electroceramic systems. The work focuses on in-situ impedance measurements and tracer diffusion studies using deuterated water to study incorporation pathways, mechanisms, and kinetics of H+ in BaTiO3. Specifically, the effect of electrode composition on proton incorporation under high-humidity conditions will be presented, and the proton surface exchange reactions at the electrodes will be compared as a function of both electrode composition and potential. This work was funded by the Center for Dielectrics and Piezoelectric, an NSF Industry/University Cooperative Research Center, under grant IIP-1841466. |