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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.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Survey of Constrained Grain Boundary Migration Mechanisms
Advanced TEM of Interfaces and Defects in Functional Ceramics
Anisotropy at Interfaces in Rare-earth Pyrosilicates for High-temperature Coatings
Effect of Electrode Composition and Potential on Moisture Incorporation and Degradation in Dielectrics and Piezoelectrics
Electromigration-induced Defects' Evolution in Polycrystalline Interconnects: Insights from Phase-field Simulations
Equilibrium and Kinetic Shapes of Grains in Polycrystals
Grain Boundary Engineering ZnAl2O4 via Rare Earth (RE) Doping with Varying Ionic Radii
Implications of Ferroelectricity in Perovskite Solar Cells
Phase Stability of Sr1-xBaxMnO3 (0 ≤ x ≤ 0.5) Films Using Combinatorial Substrate Epitaxy
Relating Grain Size Distributions and Grain Boundary Excess Coverages to Complexion Transitions in Eu-doped MgAl2O4
The Impact of Metastable Grain Boundary States on Mobility in FCC Metal
Thermal Property of Diamond Thin Film on Si (100) Substrate
Vacancy-enhanced Grain Boundary Migration

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