|About this Abstract
|MS&T23: Materials Science & Technology
|Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|Segregation Engineering in Metal Oxide Nanoparticle-derived Ceramics
|Oliver Diwald, Korbinian Aicher, Thomas Schwab, Gregor Zickler
|On-Site Speaker (Planned)
Ion exsolution can be instrumental to engineer intergranular regions inside ceramic microstructures that are derived from nanocomposites. We explored the potential of vapor phase-grown MgO nanoparticles hosting Ba2+, In3+ and Fe3+ admixtures as precursors for engineered intergranular regions.[1,2]
During annealing-induced exsolution from the nanocrystal bulk into the grain interfaces, the impurity admixtures impact grain coarsening and powder densification, effects that were compared for the first time using an integrated characterization approach. The comprehensive structural analysis with electron microscopy and X-ray diffraction enabled us to draw conclusions on the structure-property-relationships that are controlled by the impurity dispersion inside the MgO grain network. In this contribution we will discuss the different properties which arise from functionalizing the intergranular region with BaO (for luminescence), with MgFe2O4 (for magnetism) or with MgIn2O4 (for adding semiconductivity).