抄録
Novel glass-ceramics were prepared via sintering and crystallization by heating powder compacts of calcium phosphate invert glasses. The glass-ceramics were relatively dense materials consisting predominantly of crystalline phases such as β-Ca3(PO4)2 and β-Ca2P2O7 with glassy phases. Composition of the glassy phase as the matrix varies with the additives and the chemical properties of the phase influence the bioactivity of the glass-ceramics. By soaking in simulated body fluid, a calcium phosphate phase was formed newly on the surface of the glass-ceramic derived from 60CaO·30P2O5·7Na2O · 3TiO2 glass: it was implied to show bioactivity. The glass-ceramic has relatively high fracture toughness of K1c≈2MPa·m0.5 and bending strength of 100~120MPa.
