Biocompatibility and the physical properties of bio-glass ceramics in the Na₂OCaO-SiO₂-P₂O5 system with CaF₂ and MgF₂ additives
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Biocompatibility of a new bio-glass composition was evaluated with the addition of fluorides, such as CaF2 and MgF2, for the substitution of Na2O in the conventional bio-glass composition (SiO2-CaO-Na2O-P2O5). Also, the physical properties of Na2OCaO- SiO2-P2O5 glass ceramics were investigated. When B2O3 (4 mol%) was added as a Na2O substitution, the thermal expansion coefficient was decreased in sintered samples (650-950 oC). Compared to the low flexural strength (57 ± 3MPa) and Vickers hardness (4.6 GPa) of sintered bio-glass ceramics without fluoride and B2O3 additions, new bio-glass ceramics substituted with 10 mol% MgF2 for Na2O showed more higher mechanical properties (flexural strength: 141 ± 5 MPa, Vickers hardness: 5.6 GPa). The thermal expansion coefficient of bio-glass ceramics due to the ion substitutions (Ca2+, Mg2+ and B3+) was decreased from 16 × 10-6/ oC to 9.4-10 × 10-6/ oC (~400 oC)
Abstract
Biocompatibility of a new bio-glass composition was evaluated with the addition of fluorides, such as CaF2 and MgF2, for the substitution of Na2O in the conventional bio-glass composition (SiO2-CaO-Na2O-P2O5). Also, the physical properties of Na2OCaO- SiO2-P2O5 glass ceramics were investigated. When B2O3 (4 mol%) was added as a Na2O substitution, the thermal expansion coefficient was decreased in sintered samples (650-950 oC). Compared to the low flexural strength (57 ± 3MPa) and Vickers hardness (4.6 GPa) of sintered bio-glass ceramics without fluoride and B2O3 additions, new bio-glass ceramics substituted with 10 mol% MgF2 for Na2O showed more higher mechanical properties (flexural strength: 141 ± 5 MPa, Vickers hardness: 5.6 GPa). The thermal expansion coefficient of bio-glass ceramics due to the ion substitutions (Ca2+, Mg2+ and B3+) was decreased from 16 × 10-6/ oC to 9.4-10 × 10-6/ oC (~400 oC)
참고문헌 (9)
- H. Aoki, , Journal of DentalOutlook, 49, pp.567~575 (1977)
- T. Kokubo, , Bulletin of Chemical Research Institute for Kyoto Univ, 60, pp.260~268 (1982)
- R.G. Hill, , Journal of Non-Crystalline Solids, 336, pp.223~229 (2004)
- S. Agathopoulos, , Journal of Non-Crystalline Solids, 352, pp.322~328
- H.A. ElBatal, , Materials Chemistry and Physics, 80, pp.599~609 (2003)
- L.L. Hench, , Journal of American Ceramic Society, 81(7), pp.1705~1728 (1998)
- T. Toya, , Journal of European Ceramic Society, 24, pp.2367~2372 (2004)
- D. Tulyaganov, , Ceramic International, 28, pp.515~ (2002)
- Z. Strnad, "Glass-Ceramic Materials" (1986), Elsevier, Amsterdam