| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
|
| Presentation Title |
Tracking the State of Transition Elements Ni and Fe in Oxide Microstructures |
| Author(s) |
Michael Knight, Ivar E. Reimanis, Dylan Jennings, Sandrine Ricote, Wolfgang Rheinheimer |
| On-Site Speaker (Planned) |
Ivar E. Reimanis |
| Abstract Scope |
Small amounts of Ni may have a profound effect on the sintering, microstructure development, and final properties of perovskite oxides used in catalysis, fuel cells, solar water-splitting, and other functional applications. The role of Ni is coupled to its state: it may be metallic, part of a compound, in solid solution or segregated at interfaces as isolated ions (Ni2+, Ni3+). Each state exhibits a unique magnetic signature and thus magnetic measurements may be used to track Ni in the microstructure. The present work examines such measurements in yttrium-doped barium zirconate containing Ni and another material system of interest, strontium titanate containing Fe. Magnetometry is demonstrated to be a powerful tool for evaluating oxidation state of transition elements present at low concentrations in ceramic oxides. |