Thermal investigations of Ti and Ag-doped bioactive glasses

• The adding of Ag or Ti involves different variations on the Tg and Tc.
• The introduction of Ag or Ti decreases the Tf of bioactive glasses.
• Increasing addition of Ag or Ti decreases the excess entropy.

The purpose of this paper is to explore the effect of titanium and silver on the characteristic temperatures of 46S6 glass and the excess entropy. The results show that the adding of these metals in the chemical composition does not affect the amorphous character of glasses. The introduction of these elements greatly reduces the melting temperatures of glasses and involves similar variations on the crystallization and glass transition temperatures. These elements also increase the thermal stability of glasses. The excess entropy calculations show a decrease when the content of Ti or Ag increases. Contrary to crystals, synthesized glasses have entropy different to zero at T = 0 K.