Hydroxyapatite synthesised from nanosized calcium carbonate via hydrothermal method

Y. S. Wu*, W. K. Chang, M. Jou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Hydroxyapatite (HAp) was synthesised using a hydrothermal method. Nanosized CaCO 3 was used as the calcium source, while (NH 4) 2HPO 4 was used as the phosphorous source. Well crystallised HAp and a small amount of b-tricalcium phosphate (β-TCP) were obtained after the hydrothermal reaction. Fourier transform infrared spectra show that under conditions of pH 6 and 250°C, the functional groups of OH - and PO4 3- were stronger than those under pH 10. This suggests that the powder synthesised at pH 6 has more HAp phase than that at pH 10. Scanning and transmission electron microscope images show that HAp exhibits a rod-like shape at pH 6 and 250°C. After hydrothermal reaction at pH 6 and 250°C, most products are HAp with a small amount of β-TCP synthesised as byproduct and some residual CaCO 3.

Original languageEnglish
Pages (from-to)119-123
Number of pages5
JournalMaterials Technology
Issue number1
Publication statusPublished - 2012 Feb


  • Hydrothermal
  • Hydroxyapatite
  • Nanocalcium carbonate
  • β-Tricalcium phosphate

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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