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    • Keywords


      Hydroxyapatite; particle size; sol–gel; calcination; phase purity; crystallinity.

    • Abstract


      Hydroxyapatite (HA) nano powders (20–60 nm) were synthesized using a sol–gel route with calcium nitrate and phosphoric acid as calcium and phosphorus precursors, respectively. Double distilled water was used as a diluting media for HA sol preparation and ammonia was used to adjust the pH. After aging, the HA gel was dried at 65°C and calcined to different temperatures ranging from 200–800°C. The dried and calcined powders were characterized for phase composition using X-ray diffractometry, elemental dispersive X-ray and Fourier transform infra-red spectroscopy. The particle size and morphology were studied using transmission electron microscopy. Calcination revealed HA nano powders of increased particle size and crystallinity with increase in temperature. For all calcinations temperatures, the particle size distribution analysis of HA powders showed skewed distribution plot. At temperature of 700°C and above, formation of CaO was noticed which was attributed to phosphorous volatilization. This study showed that high purity HA with varying degrees of crystallinity could be obtained using this simple technique.

    • Author Affiliations


      K P Sanosh1 Min-Cheol Chu2 A Balakrishnan1 T N Kim1 Seong-Jai Cho2

      1. Department of Information and Electronic Materials Engineering, College of Engineering, Paichai University, Daejeon 302-735, Republic of Korea
      2. Division of Metrology for Emerging Technology, Korea Research Institute of Standards and Science, 1 Doryong-Dong, Yuseong-Gu, Daejeon 305-340, Republic of Korea
    • Dates

  • Bulletin of Materials Science | News

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