Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Microstructural Development in Synthetic Hydroxyapatite

합성 수산화아파타이트의 미세구조 발달

  • Kim, Jong-Hee (School of Materials Science and Engineering, Pusan National University) ;
  • Park, Young-Min (School of Materials Science and Engineering, Pusan National University) ;
  • Yang, Tae-Young (School of Materials Science and Engineering, Pusan National University) ;
  • Yoon, Seog-Young (School of Materials Science and Engineering, Pusan National University) ;
  • Park, Hong-Chae (School of Materials Science and Engineering, Pusan National University)
  • Published : 2004.04.01
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Abstract

Whisker and short rod shaped hydroxyapatite (Ca$_{10}$(PO$_4$)$_{6}$(OH)$_2$ with stoichiometric composition (Ca/P=1.62 -1.67, molar ratio) has been synthesized by hydrolysis and hydrothermal reaction of aqueous $\alpha$-Ca$_3$(PO$_4$)$_2$($\alpha$-TCP) solution (pH 11), respectively. The shape of resultant HAp was mainly dependent on synthetic route and the microstructural development was on processing condition. In hydrolysis processing, the degree of intersection of whiskerlike particles and agglomeration in the apsis line increased with increasing reaction time. In hydrothermal synthesis, the reaction product obtained under excessive reaction time ($\geq$3 h at 20$0^{\circ}C$) was severely agglomerated without further grain growth above certain critical size (0.75 ${\mu}{\textrm}{m}$ in length, 0.3${\mu}{\textrm}{m}$ 11m in diameter).

양론조성에 근접하는 (Ca/P=1.62-1.67, molar ratio) 휘스커 및 짧은 막대형상의 수산화아파타이트 (Ca$_{10}$(PO$_4$)$_{6}$(OH)$_2$를 $\alpha$-Ca$_3$(PO$_4$)$_2$($\alpha$-TCP) 수용액 (pH 11)의 가수분해와 수열반응으로 각각 합성하였다. 생성된 HAp의 입자형상은 합성방법에, 미세구조의 발달은 반응조건에 주로 의존하였다 가수분해의 경우 반응시간의 경과와 더불어 휘스커 입자들의 상호 교차와 장축방향에서의 응집이 일어났다 반면에, 수열처리에 있어서는 반응과정 중 임계크기(길이 0.75$mu extrm{m}$, 지름 0.3$\mu\textrm{m}$) 이상으로의 입성장은 일어나지 않았으며 과다한 반응시간(20$0^{\circ}C$, $\geq$3시간)은 입자들의 심한 응집을 유발하였다.

Keywords

References

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