Abstract
The interest in glasses containing iron oxides is determined by the possibility for application in optics, sensors,nanoelectronics, biotechnology and medicine. Subject of the present investigation is the preparation of glasses inthe system 16Na2O/10CaO/(74-x)SiO2/xFe2O3, x = 0, 5, 10 and 15 mol % by applying the traditional melt-quenchingtechnique. X-ray diffraction analysis proves that the materials with up to 15 mol % Fe2O3are amorphous whilefor higher concentrations, the crystallization of magnetite and hematite occurs during melt quenching. For thephysicochemical characterization of the glasses, the density, molar volume and oxygen packing density have beendetermined. The Becke line method has been utilized for the refractive indices measurement. The structural evolutionin dependence of the Fe2O3concentration has been studied by Fourier Transformed Infrared Spectroscopy. The dataobtained from the different methods correlates well and reveals a depolymerization tendency of the silicate networkwith the increasing Fe2O3concentration, i.e. an increase in the number of SiO4tetrahedra with more non-bridgingoxygens as a result of the occurrence of Fe-containing polyhedra in the glass structure.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
