Journal of Inorganic Materials

• Research Paper • Previous Articles     Next Articles

Low Melting Temperature Machinable Bioactive Glass-ceramic

QIN Xiao-Mei; XIU Zhi-Meng; ZUO Liang; LI Song   

  1. School of Materials & Metallurgy; Northeastern University; Shenyang 110004; China
  • Received:2002-09-23 Revised:2002-11-04 Published:2003-11-20 Online:2003-11-20

Abstract: A basic composition of SiO2-MgO-Al2O3-K2O-CaO-P2O5-F glass system was selected,
and different contents of ZnO were added. The melting results show that the addition of ZnO can reduce the melting temperature of the glass
from 1450℃ to 1300℃. Thus, the transparent as-cast glasses of the machinable bioactive glass ceramic can be obtained at the lower temperature.
The main phases of the glass ceramic are mainly mica phase and apatite phase after crystallization. Microstructure of the glass ceramic is petaloid-like.
The fracture of the glass ceramic is transgranular and some crystals are drawn and this feature makes the glass ceramic show high strength. The glass ceramic
also has good machinability due to the existence of mica phase.

Key words: low-melting temperature, machinability, bioactive, glass-ceramic

CLC Number: