| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials 2024
|
| Presentation Title |
Phase Control in Hafnia Nanoparticles: Towards Ferroelectric Nanoparticles |
| Author(s) |
Jennifer Andrew |
| On-Site Speaker (Planned) |
Jennifer Andrew |
| Abstract Scope |
The size-dependent properties of electroceramic nanoparticles have long been of interest to researchers and technology developers. The quest to realize ferroelectricity in the smallest of nanoparticles has spanned several decades with limited success. Instead, a loss of ferroelectric behavior has been observed for small particle/grain sizes in traditional perovskite-based materials (e.g., BaTiO3, PZT). Recently, however, fluorite-based materials including hafnia and hafnia-based films have displayed an inverse-size effect of ferroelectric behavior, i.e., hafnia thin films exhibit ferroelectricity from dimensions of ~10 nm down to 5 unit cells. Studying the emergence of the ferroelectric phase in hafnia-based nanoparticles provides a platform to elucidate the origin of this inverse size effect. Here, we present a solution-based process for the synthesis of hafnia-based nanoparticles and demonstrate how modulation of processing conditions can be used to control the aggregation state of pre-crystalline amorphous particles and the resulting phase. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nanotechnology, Ceramics, Electronic Materials |