Abstract
This study proposes a novel type of macroporous ceramic scaffolds, which are comprised of hollow tubular filaments with a highly microporous structure, using 3-dimensional ceramic/camphene-based co-extrusion (3D-CoEx). The use of an initial feedrod, comprised of a camphene core and an alumina/camphene shell, enabled the construction of hollow tubular frameworks and micropores through the removal of the camphene phase. The produced scaffolds showed 3-dimensionally interconnected macropores with dimensions of 250-300. μm. ×. 400-550. μm, which were surrounded by hollow alumina filaments (500. μm in diameter) featuring a number of micropores (several tens of microns in size). This unique macro/micro-porous structure could achieve a combination of both the reasonably high compressive strength of ~5.4. MPa and very high porosity of 86. vol%. In addition, the final mechanical properties and overall porosity of the porous alumina scaffolds could be fine-tuned by adjusting initial alumina content in the alumina/camphene.
| Original language | English |
|---|---|
| Article number | 10252 |
| Pages (from-to) | 4623-4627 |
| Number of pages | 5 |
| Journal | Journal of the European Ceramic Society |
| Volume | 35 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 2015 Dec |
Bibliographical note
Funding Information:This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. NRF-2012R1A1B3003128) and the National Research Foundation of Korea (NRF) granted by the Korea government (NRF-2015R1A2A2A01007056).
Publisher Copyright:
© 2015 Elsevier Ltd.
Keywords
- AlO
- Biomedical applications
- Extrusion
- Mechanical properties
- Porous ceramics
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry