Crystallization behavior of 45S5 bioactive glass modified by therapeutic ions


Taygun M. M. , Hocaoglu V.

INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE, vol.9, no.1, pp.62-69, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 9 Issue: 1
  • Publication Date: 2018
  • Doi Number: 10.1111/ijag.12281
  • Title of Journal : INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
  • Page Numbers: pp.62-69
  • Keywords: bioactive glass, crystallization, differential thermal analysis, therapeutic ions, DOPED CALCIUM POLYPHOSPHATE, TRICALCIUM PHOSPHATES, COMPOSITE SCAFFOLDS, ACTIVATION-ENERGY, PARTICLE-SIZE, IN-VITRO, KINETICS, NUCLEATION, GROWTH, ANGIOGENESIS

Abstract

This is the first study that investigates the crystallization behavior of strontium- and copper-doped bioactive glasses by both isothermal and nonisothermal methods using differential thermal analysis (DTA) data. DTA results showed that bioactive glasses are suitable for glass-ceramic production. Isothermal and nonisothermal DTA experiments indicated that the crystallization activation energies of strontium-doped bioactive glasses are in the range of 304.1-327.7 kJ/mol, whereas the activation energies of copper-doped bioactive glasses change in the range of 219.13-263.20 kJ/mol. It was found that crystallization activation energies of strontium-doped glasses are higher than those of the copper-doped glasses. Avrami exponent, n, values of bioactive glasses showed that the bulk crystallization was found to predominate in all samples. Results revealed that isothermal and nonisothermal crystallization kinetics of strontium- and copper-doped bioactive glasses are in agreement within the experimental error.