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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/032/05/0465-0470

    • 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

       
      Published
      October 2009
      Manuscript received
      29 August 2008
      Manuscript revised
      12 December 2008

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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