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 μm 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1029-1034 |
| Number of pages | 6 |
| Journal | Journal of the European Ceramic Society |
| Volume | 32 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2012 May 1 |
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Keywords
- A. Extrusion
- C. Mechanical properties
- D. Al O
- E. Biomedical applications
- Porous ceramics
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry
Cite this
Porous alumina ceramics with highly aligned pores by heat-treating extruded alumina/camphene body at temperature near its solidification point. / Moon, Young Wook; Shin, Kwan Ha; Koh, Young-Hag; Choi, Won Young; Kim, Hyoun Ee.
In: Journal of the European Ceramic Society, Vol. 32, No. 5, 01.05.2012, p. 1029-1034.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Porous alumina ceramics with highly aligned pores by heat-treating extruded alumina/camphene body at temperature near its solidification point
AU - Moon, Young Wook
AU - Shin, Kwan Ha
AU - Koh, Young-Hag
AU - Choi, Won Young
AU - Kim, Hyoun Ee
PY - 2012/5/1
Y1 - 2012/5/1
N2 - 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 μm 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.
AB - 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 μm 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.
KW - A. Extrusion
KW - C. Mechanical properties
KW - D. Al O
KW - E. Biomedical applications
KW - Porous ceramics
UR - http://www.scopus.com/inward/record.url?scp=84855796415&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855796415&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2011.11.035
DO - 10.1016/j.jeurceramsoc.2011.11.035
M3 - Article
VL - 32
SP - 1029
EP - 1034
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 5
ER -