About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Powder and Ceramic Materials Science
|
Presentation Title |
Influence of Secondary Phase Segregation on Electrical Behavior in Entropy Stabilized Oxides |
Author(s) |
Alina M. Vizcaya, Arturo A. Meza, Alexander D. Dupuy, Julie M. Schoenung |
On-Site Speaker (Planned) |
Alina M. Vizcaya |
Abstract Scope |
Entropy stabilized oxides (ESOs) are materials consisting of five or more oxide components mixed in equimolar amounts. ESOs have attracted significant attention due to their expanded compositional space and promise in a variety of applications, including energy storage and electronic devices. However, the role of microstructure on the electrical behavior in ESO materials is not well understood. In this work, bulk equimolar (Co,Cu,Mg,Ni,Zn)O is produced via solid-state processing, followed by conventional sintering. The microstructure is controlled by heat treating the samples at 650°C for 2, 4, 12, 24, and 48 hours. Electrochemical impedance spectroscopy (EIS) revealed that ESO’s electrical properties vary as a function of heat treatment time due to changes in the microstructure. The interplay between microstructure and electrical behavior will be discussed in terms of electrical conductivity, dielectric constant, and activation energy for electronic transport. |
Proceedings Inclusion? |
Planned: |
Keywords |
Powder Materials, Phase Transformations, Energy Conversion and Storage |