About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Magnetic Materials
|
Presentation Title |
Superparamagnetic Iron Oxide-based Bulk Nanocomposites |
Author(s) |
Diletta Giuntini |
On-Site Speaker (Planned) |
Diletta Giuntini |
Abstract Scope |
High-magnetization, low-coercivity materials made out of earth-abundant constituents are a long-held goal of materials engineers. A new category of nanocomposites shows promise in this direction. Supercrystalline nanocomposites consist of inorganic nanoparticles functionalized with organic ligands and architected into long-range order structures, similar to atomic crystals. Using magnetite nanoparticles, below 20 nm in size and functionalized with simple oligomers, bulk poly-supercrystals with tunable magnetic and mechanical behavior can be produced, also in complex shapes. The intrinsic combination of nano-sized building blocks and their periodic arrangement leads to superparamagnetism, with a saturation magnetization above 90 emu/g and negligible coercivity, and additionally mechanical robustness. Future directions into further tuning this set of properties and defining strategies for upscaling and development of hierarchical nanocomposites are outlined. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Composites, Magnetic Materials |