Porous alumina ceramics with highly aligned pores by heat-treating extruded alumina/camphene body at temperature near its solidification point

Young Wook Moon, Kwan Ha Shin, Young-Hag Koh, Won Young Choi, Hyoun Ee Kim

Research output: Contribution to journalArticle

21 Citations (Scopus)

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 languageEnglish
Pages (from-to)1029-1034
Number of pages6
JournalJournal of the European Ceramic Society
Volume32
Issue number5
DOIs
Publication statusPublished - 2012 May 1

Fingerprint

Camphene
Aluminum Oxide
Solidification
Alumina
Heat treatment
Temperature
Compressive strength
Pore size
Hot Temperature
camphene
Porosity

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 journalArticle

@article{c383f715e3e24e99b274d74bb6205c43,
title = "Porous alumina ceramics with highly aligned pores by heat-treating extruded alumina/camphene body at temperature near its solidification point",
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.",
keywords = "A. Extrusion, C. Mechanical properties, D. Al O, E. Biomedical applications, Porous ceramics",
author = "Moon, {Young Wook} and Shin, {Kwan Ha} and Young-Hag Koh and Choi, {Won Young} and Kim, {Hyoun Ee}",
year = "2012",
month = "5",
day = "1",
doi = "10.1016/j.jeurceramsoc.2011.11.035",
language = "English",
volume = "32",
pages = "1029--1034",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier BV",
number = "5",

}

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 -