Published December 22, 2021
| Version v1
Publication
Influences of the solid load on the microstructure and compressive behavior of Fe2O3 scaffolds manufactured by freeze-casting using stearic acid as dispersant agent
Description
Porous materials manufactured by freeze-casting are demonstrating potential application as oxygen carriers for
the production and purification of hydrogen, or anode material for lithium-ion batteries. However, to obtain the
required pore morphology and sufficient mechanical strength, the suspension processing parameters must be
controlled. Fe2O3 nanoparticles/camphene suspensions were fabricated using stearic acid as the dispersant agent
showing a low-viscosity (130 mPa⋅s) with a high solid volume fraction (0.3). Suspensions show a shear-thinning
behavior according to the Sisko model and a maximum packing fraction of 0.569 estimated from a zero porosity
sample. A modified Krieger and Dougherty model was introduced to incorporate the influence of the particleaspect ratio. The Fe2O3 scaffolds manufactured by freeze-casting shown a gradient pore size along the
freezing direction, which was diminished with the solid volume fraction, the compression strength was improved
with the pore size reduction and fitted according to the minimum solid area model.
Abstract
Universidad de Sevilla PIF II.2AAbstract
Agencia Estatal de Investigación (AEI) MAT2016-76713-PAdditional details
Identifiers
- URL
- https://idus.us.es/handle//11441/128557
- URN
- urn:oai:idus.us.es:11441/128557