Highly porous hydroxyapatite bioceramics with interconnected pore channels using camphene-based freeze casting

Eun Jung Lee, Young Hag Koh, Byung Ho Yoon, Hyoun Ee Kim, Hae Won Kim

Research output: Contribution to journalArticlepeer-review

120 Citations (Scopus)

Abstract

We fabricated highly porous hydroxyapatite (HA) bioceramics using the camphene-based freeze casting method. In this method, HA/camphene slurries with various HA contents (10, 15, and 20 vol.%) were prepared by ball-milling at 60 °C and then cast into a mold at room-temperature. This method allowed the fabricated sample to have completely interconnected pore channels by removing the frozen camphene network via sublimation and dense HA walls by sintering the highly packed HA powder networks at 1250 °C for 3 h. As the initial HA content was increased from 10 to 20 vol.%, the porosity decreased from 75 to 56%, while the compressive strength remarkably increased from 0.94 to 17 MPa.

Original languageEnglish
Pages (from-to)2270-2273
Number of pages4
JournalMaterials Letters
Volume61
Issue number11-12
DOIs
Publication statusPublished - 2007 May
Externally publishedYes

Keywords

  • Bioceramics
  • Freeze casting
  • Hydroxyapatite
  • Porous
  • Strength

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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