Effect of a polymer addition on the crystallite size and sinterability of hydroxyapatite prepared with CaO powder and phosphoric acid

Sang Jin Lee, Ji Yeon Kwak, Waltraud M. Kriven

Research output: Contribution to journalArticlepeer-review

Abstract

Highly sinterable hydroxyapatite (HAp) ceramics were fabricated by the addition of polyethylene glycol (PEG) to a slurry consisting of CaO powder and phosphoric acid. The morphology of the synthesized powder was changed to a more porous structure and the particles showed a finer crystallite size by the addition of PEG in the solution process. The synthesized HAp powder employing PEG showed a higher surface area of 34.0 m 2/g and a denser sintered microstructure in comparison with that prepared without PEG. The porous and soft agglomerated powders prepared by the application of the PEG polymer were easily dispersed to nano-sized powders of about 80~100 nm by an ultrasonic process and the powder compacts were well densified at 1300 ̊C for 1 h showing a fine grain size of 1.2 μm.

Original languageEnglish (US)
Pages (from-to)243-247
Number of pages5
JournalJournal of Ceramic Processing Research
Volume13
Issue number3
StatePublished - 2012

Keywords

  • Hydroxyapatite
  • PEG polymer
  • Powder
  • Sintering

ASJC Scopus subject areas

  • Ceramics and Composites

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