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http://dx.doi.org/10.4191/KCERS.2002.39.5.490

Preparation of CaO-SiO2-B2O3 Glass-ceramics and Evaluation of Bioactivity Using in-vitro Test  

Ryu, Hyun-Seung (School of Materials Science and Engineering, Seoul National University)
Seo, Jun-Hyuk (School of Materials Science and Engineering, Seoul National University)
Kim, Hwan (School of Materials Science and Engineering, Seoul National University)
Hong, Kug-Sun (School of Materials Science and Engineering, Seoul National University)
Kim, Deug-Joong (Department of Materials Engineering, Sungkyunkwan University)
Lee, Jae-Hyup (Department of Orthopedic surgery, Seoul National University)
Lee, Dong-Ho (Department of Orthopedic surgery, Seoul National University)
Chang, Bong-Soon (Department of Orthopedic surgery, Seoul National University)
Lee, Choon-Ki (Department of Orthopedic surgery, Seoul National University)
Publication Information
Journal of the Korean Ceramic Society / v.39, no.5, 2002 , pp. 490-497 More about this Journal
Abstract
Sintering property, mechanical property and bioactivity of $CaO-SiO_2-B_2O_3$ glass-ceramics were investigated. This glass-ceramics was sintered at 750-830${\circ}$ and showed nearly pore-free microstructure. The glass-ceramics consisted of three phases, i.e. monclinic-wollastonite, calcium borate and borosilicate glass matrix. The mechanical strength was higher than that of other bioactive ceramics, especially compressive strength(2813 MPa) and fracture toughness($3.12 MPa{\cdot}m^{1/2}$). Bioactivity of the glass-ceramics depends on amount of $CaB_2O_4$ and borosilicate glass matrix. It might be likely that more soluble $CaB_2O_4$ raises supersaturation of Ca ion in SBF solution and borosilicate glass forms Si-OH group that presents nucleation site of hydroxycarbonate apatite(HCA) layer. So, glassceramics of more $CaB_2O_4$ and borosilicate glass showed better bioactivity.
Keywords
Sintering; CaO-$SiO_2-B_2O_3$ glass-ceramics; Wollastonite; Bioactivity; Mechanical strength;
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