Assembling unidirectionally frozen alumina/camphene bodies for aligned porous alumina ceramics with larger dimensions

Young Mi Soon, Kwan Ha Shin, Young-Hag Koh, Won Young Choi, Hyoun Ee Kim

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

This paper proposes a novel way of producing aligned porous alumina ceramics with larger dimensions by assembling unidirectionally frozen alumina/camphene bodies, particularly those containing polystyrene (PS) polymer as the binder. The compressive strength of the samples sintered at 1450 °C for 3. h increased remarkably from 2 ± 0.1 to 16 ± 2. MPa with increasing PS content from 5 to 20. vol.% due to the prevention of cracks generally caused by drying shrinkage. In addition, frozen samples with a PS content of 20. vol.% could be assembled into larger dimensions without difficulty. The height of the assembled sample produced with a lamination number of 5 could be increased to ∼24. mm without a severe decrease in compressive strength (16 ± 3. MPa at a porosity of ∼79. vol.%) due to the maintenance of an aligned porous structure with good interfacial bonding between the laminations.

Original languageEnglish
Pages (from-to)415-419
Number of pages5
JournalJournal of the European Ceramic Society
Volume31
Issue number3
DOIs
Publication statusPublished - 2011 Mar 1

Keywords

  • Apatite
  • Biomedical applications
  • Mechanical properties
  • Porosity
  • Suspensions

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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