Porous alumina ceramics with highly aligned pores by heat-treating extruded alumina/camphene body at temperature near its solidification point
- Authors
- Moon, Young-Wook; Shin, Kwan-Ha; Koh, Young-Hag; Choi, Won-Young; Kim, Hyoun-Ee
- Issue Date
- 5월-2012
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Extrusion; Mechanical properties; Al2O3; Biomedical applications; Porous ceramics
- Citation
- JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.32, no.5, pp.1029 - 1034
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
- Volume
- 32
- Number
- 5
- Start Page
- 1029
- End Page
- 1034
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/108501
- DOI
- 10.1016/j.jeurceramsoc.2011.11.035
- ISSN
- 0955-2219
- Abstract
- This study reports a novel way of increasing the pore size of highly aligned porous alumina ceramics by heat-treating an extruded alumina/camphene body at a temperature near its solidification point. The pore size obtained increased remarkably from 51 +/- 8 to 125 +/- 27 mu m with increasing heat-treatment time from 1 to 24 h, due to the continuative overgrowth of the camphene dendrites during heat-treatment, while a highly aligned porous structure was preserved. In addition, interestingly, this heat-treatment enabled alumina walls to be densified quite well, whereas porous walls were observed in the sample produced without heat-treatment, which led to a considerable increase in compressive strength. The sample produced with a heat-treatment time of 12 h showed a high compressive strength of 11.6 +/- 1.2 MPa at a porosity of approximately 84 vol%, which was much higher than that (0.28 +/- 0.1 MPa) of the sample produced without heat-treatment. (C) 2011 Elsevier Ltd. All rights reserved.
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Collections - Graduate School > Department of Bioengineering > 1. Journal Articles
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