Production of highly aligned porous alumina ceramics by extruding frozen alumina/camphene body

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

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We herein propose a new technique for producing highly aligned porous ceramics by extruding a frozen ceramic/camphene body. To accomplish this, an alumina/camphene slurry with an initial alumina content of 10. vol% was first frozen unidirectionally in a 20. mm × 20. mm mold and extruded through a reduction die with a cross-section of 5. mm × 5. mm at room-temperature. This simple process enabled the formation of porous alumina ceramics with highly aligned pores as a replica of the camphene dendrites with a preferential orientation parallel to the extrusion direction. The sample showed much higher compressive strength of 280 ± 80. kPa with a porosity of 83. vol% when tested parallel to the direction of pore alignment. In addition, these materials could be used as a valuable framework for the production of ceramic/epoxy composites, particularly with a lamellar structure, which would result in a remarkable increase in mechanical properties.

Original languageEnglish
Pages (from-to)1945-1950
Number of pages6
JournalJournal of the European Ceramic Society
Volume31
Issue number11
DOIs
Publication statusPublished - 2011 Oct 1

Fingerprint

Camphene
Aluminum Oxide
Alumina
Lamellar structures
Compressive strength
Extrusion
Porosity
Mechanical properties
Composite materials
camphene
Temperature
Direction compound

Keywords

  • Al2O3
  • Biomedical applications
  • Extrusion
  • Mechanical properties
  • Porous ceramics

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Production of highly aligned porous alumina ceramics by extruding frozen alumina/camphene body. / Moon, Young Wook; Shin, Kwan Ha; Koh, Young-Hag; Choi, Won Young; Kim, Hyoun Ee.

In: Journal of the European Ceramic Society, Vol. 31, No. 11, 01.10.2011, p. 1945-1950.

Research output: Contribution to journalArticle

Moon, Young Wook ; Shin, Kwan Ha ; Koh, Young-Hag ; Choi, Won Young ; Kim, Hyoun Ee. / Production of highly aligned porous alumina ceramics by extruding frozen alumina/camphene body. In: Journal of the European Ceramic Society. 2011 ; Vol. 31, No. 11. pp. 1945-1950.
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