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Novel bioactive and biodegradable glass ceramics with high mechanical strength in the CaOSiO~2~B~2~O~3~ system by Hyun‐Seung Ryu; Jung‐Kun Lee; Jun‐Hyuk Seo; Hwan Kim; Kug Sun Hong; Deug Joong Kim; Jae Hyup Lee; Dong‐Ho Lee; Bong‐Soon Chang; Choon‐Ki Lee; Sung‐Soo Chung is a Engineering article available to read on EtoBox.

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## Abstract Novel bioactive and biodegradable glass ceramics with high mechanical strength in the (50‐__x__/2)CaO · SiO~2~__x__B~2~O~3~ (4.2 ≤ __x__ ≤ 17.2) system were investigated. The systems consisted of three phases: monoclinic wollastonite, calcium metaborate, and amorphous borosilicate matrix. The glass ceramics containing 4.2 mol% and 8.4 mol% B~2~O~3~ showed high bulk density and a dense microstructure. Mechanical strengths of the glass ceramics were higher than those of other bioactive ceramics: high compressive strength (2813 MPa), bending strength of 212 MPa, and fracture toughness of 3.12 MPa · m^1/2^. The glass‐ceramic formed apatite layer on their surface in the simulated body fluid and showed significant biodegradation. The degree of apatite formation in the glass ceramics depended on the calcium metaborate content and borosilicate glassy matrix. Additional calcium metaborate and borosilicate glassy matrix increased the apatite formation rate on the surface. It might be likely that calcium metaborate causes supersaturation of Ca ions, for its high solubility in SBF and the water‐reactive borosilicate glassy matrix formed SiOH groups on the surface to provide nucle

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Author

Hyun‐Seung Ryu; Jung‐Kun Lee; Jun‐Hyuk Seo; Hwan Kim; Kug Sun Hong; Deug Joong Kim; Jae Hyup Lee; Dong‐Ho Lee; Bong‐Soon Chang; Choon‐Ki Lee; Sung‐Soo Chung

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Heterocorporation; Wiley (ISSN 0021-9304)

Published

2003

Language

EN

Field

Engineering (Physical Sciences)