About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Powder and Ceramic Materials Science
|
Presentation Title |
Fabrication of Ultra-lightweight and Highly Porous Alumina Scaffolds by a Novel Sol-gel/Freeze-casting Hybrid Method |
Author(s) |
Pei-Chieh Ho, Haw-Kai Chang, Po-Yu Chen |
On-Site Speaker (Planned) |
Pei-Chieh Ho |
Abstract Scope |
Ceramic-based scaffolds developed by the freeze casting method exhibit anisotropic lamellar and interconnected porous structure and can be adopted for filtration, insulation, absorption and many applications. However, the upper limit of porosity caused by the wetting ability of ceramic powders has restricted functionalities of scaffolds fabricated by the traditional freeze-casting method. In this study, the sol-gel/freeze-casting hybrid method was developed to fabricate the alumina scaffolds with low bulk density (200-500 kg/m3) and proper specific strength. The microstructural features of the lamellar structure and continuous surface developed from the condensation reaction were evaluated by SEM. The ultra-lightweight porous alumina scaffolds successfully fabricated by this hybrid method show high specific surface area and proper mechanical stability. The porosity of alumina scaffolds can reach over 90%, possessing great potential for filtration and gas absorption applications in the future and this hybrid sol-gel/freeze casting approach can be extended to ceramic/glass scaffolds with varying functionalities. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Process Technology, Other |