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Preparation of calcium phosphates by hydrothermal synthesis route

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2019, 29(5), pp.203-207
  • DOI : 10.6111/JKCGCT.2019.29.5.203
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : August 22, 2019
  • Accepted : September 27, 2019
  • Published : October 31, 2019

Sung Wook Moon 1,  BYEONG WOO LEE 1

1한국해양대학교

Accredited

ABSTRACT

Calcium phosphates such as hydroxyapatite (HAp), tricalcium phosphate (β-TCP), and biphasic calcium phosphate (BCP, HAp/β-TCP) have been prepared via hydrothermal treatment. The synthesis was conducted by reacting (Ca(OH)2) aqueous solution with phosphoric acid (H3PO4) under different hydrothermal synthesis conditions (temperatures up to 150°C and pH lower than 12). The effects of initial precursor Ca/P ratio (1.30, 1.50 and 1.67) and post heat treatment on the phase evolution behavior of the powders and sintered ceramics were investigated. The phases of resulting powders and sintered ceramics were controllable by adjusting the initial Ca/P ratio. A single HAp phase without any noticeable second phase was obtained for the initial Ca/P ratio of 1.67 in the overall heat treatment range. Pure β-TCP and biphasic calcium phosphate (HAp/β-TCP) were synthesized from precursor solutions having Ca/P molar ratios of 1.30 and 1.50, respectively, after having been heat treated at 900°C or higher. Dense ceramics with translucency were obtained at considerably lower sintering temperatures

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This paper was written with support from the National Research Foundation of Korea.
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