Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Hydroxyapatite Formation on Crystallized Bioactive Glass Coat on Alumina

알루미나에 코팅된 생체활성유리의 결정화에 따른 수산화 아파타이트 형성

  • 이은성 (인하대학교 세라믹공학과) ;
  • 지상수 (인하대학교 세라믹공학과) ;
  • 김철영 (인하대학교 세라믹공학과)
  • Published : 2003.03.01
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Abstract

Alumina glazed with a bioactive glass reacted in Simulated Body Fluids(SBF) to investigate the behavior of hydroxyapatite formation on the glass coat layer. Various crystalline phases were found depending on the firing temperatures when the bioactive glass coat was heat-treated. The glass coat was crystallized into ${\beta}$-wollastonite and apatite when fired at 1100$^{\circ}C$, and ${\alpha}$-wollastonite and apatite when fired at 1200$^{\circ}C$. Those samples reacted in SBF, and it is observed that hydroxyapatite developed on the surface of the crystallized glaze. Its formation was much easier in the sample with ${\alpha}$-wollastonite than with ${\beta}$-wollastonite. This is because that the ${\alpha}$-wollastonite dissolves more easily than ${\beta}$-wollastonite does in SBF.

생체활성 유리를 알루미나 기판에 코팅하고 이를 유사 생체 용액에 반응시켰을 때 코팅 유리층 표면에 생성된 수산화 아파타이트 형성 거동 변화에 대하여 연구하였다. 알루미나에 코팅된 생체 활성 유리를 여러 온도에서 열처리하였을 때 다양한 종류의 결정상이 나타났으며, 특히 110$0^{\circ}C$에서 열처리하였을 때는 $\beta$-wollastonite와 apatite, 120$0^{\circ}C$에서 열처리하였을 때는 $\alpha$-wollastonite와 apatite가 생성되었다. 이들 시편을 tris-완충용액에 반응시켰을 때, $\alpha$-wollastonite 결정의 부식 속도가 $\beta$-wollastonite의 부식 속도보다 빨랐다. 그리고 이들 시편을 유사 생체 용액과 반응시켰을 때는 두 코팅층 표면에서 수산화 아파타이트가 형성되었는데, 그 형성 속도는 $\alpha$-wollastonite가 포함된 시편에서 더 빨랐다.

Keywords

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