Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Preparation of hydroxyapatite/$TiO_2$ biocomposite powders by wet chemical method

습식화학법에 의한 수산화아파타이트/$TiO_2$ 생체용 복합분말의 제조

  • 정항철 (조선대학교 신소재공학과) ;
  • 이종국 (조선대학교 신소재공학과)
  • Published : 2004.06.01
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Abstract

In this work, HA/$TiO_2$ biocomposite to get high mechanical properties with biocompatibility were prepared. HA/$TiO_2$ biocomposite powders were prepared by mixing $TiO_2$ and HA powders which were synthesized through sol-gel, precipitation and hydrothermal methods. The mixing ratio was fixed at 1:1 ratio (HA/$TiO_2$, wt%). HA/$TiO_2$ biocomposite powders showed different microstructures depending on their particle size and shape. The smaller particles were coated on the surface of larger particles, whereas they were well mixed and dispersed when both $TiO_2$ and HA were nanocrystallites. HA/$TiO_2$ biocomposite powders with homogeneous microstructure showed high sintered density and good mechanical properties.

본 연구에서는 우수한 생체적합성과 높은 기계적 성질을 갖는 아파타이트 생체세라믹스를 제조하기 위하여 수산화아파타이트(HA, $Ca_{10}(PO_4)_6(OH)_2/TiO_2$ 생체복합분말을 제조하였다. HA/$TiO_2$ 생체복합분말은 침전법과 졸겔법으로 각각 제조된 $TiO_2$ 분말과 수열합성법으로 제조된 HA 분말을 1:1의 무게분율로 혼합하여 제조하였다. HA/$TiO_2$ 생체복합분말은 $TiO_2$와 HA 입자의 크기와 모양에 따라 미세구조의 차이를 나타냈으며, $TiO_2$와 HA의 입자 크기가 서로 다른 복합분말의 경우, 작은 입자는 큰 입자의 표면에 둘러싸고 있었으나, $TiO_2$와 HA의 입자 크기가 비슷한 복합분말의 경우, $TiO_2$와 HA 입자가 서로 분산되어 균일한 미세구조를 가지고 있었다 균질한 미세구조를 갖는 복합분말은 소결체 제조 시 높은-소결밀도와 우수한 기계적 특성을 나타내었다.

Keywords

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