Novel ceramic/camphene-based co-extrusion for highly aligned porous alumina ceramic tubes

Young Wook Moon, Kwan Ha Shin, Young-Hag Koh, Se Won Yook, Cheol Min Han, Hyoun Ee Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We herein propose a novel way of producing highly aligned porous alumina tubes by co-extruding an initial feed rod, which comprised of a pure camphene core and a frozen alumina/camphene shell. This new and simple technique produced alumina tubes (∼4.4 ± 0.1 mm in outer diameter) having uniform alumina walls (∼1.1 ± 0.12 mm in thickness) with highly aligned pores, which were created by removing the extensively elongated camphene dendrites in the extruded alumina/camphene shell. Furthermore, the heat treatment of the extruded bodies at 33°C, which is close to the freezing point of the alumina/camphene slurry, led to a considerable increase in the size of the aligned pores formed in the alumina walls, from ∼<5 to ∼54 μm with increasing heat-treatment time from 0 to 6 h. The compressive strength also increased significantly from 21 ± 1.6 to 61 ± 11.6 MPa, which was attributed mainly to the achievement of well densified alumina walls.

Original languageEnglish
Pages (from-to)1803-1806
Number of pages4
JournalJournal of the American Ceramic Society
Volume95
Issue number6
DOIs
Publication statusPublished - 2012 Jun 1

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Camphene
Aluminum Oxide
extrusion
ceramics
aluminum oxide
Extrusion
Alumina
Heat treatment
shell
camphene
compressive strength
Freezing
Compressive strength
slurry
freezing

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Novel ceramic/camphene-based co-extrusion for highly aligned porous alumina ceramic tubes. / Moon, Young Wook; Shin, Kwan Ha; Koh, Young-Hag; Yook, Se Won; Han, Cheol Min; Kim, Hyoun Ee.

In: Journal of the American Ceramic Society, Vol. 95, No. 6, 01.06.2012, p. 1803-1806.

Research output: Contribution to journalArticle

Moon, Young Wook ; Shin, Kwan Ha ; Koh, Young-Hag ; Yook, Se Won ; Han, Cheol Min ; Kim, Hyoun Ee. / Novel ceramic/camphene-based co-extrusion for highly aligned porous alumina ceramic tubes. In: Journal of the American Ceramic Society. 2012 ; Vol. 95, No. 6. pp. 1803-1806.
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