الفهرس 
ContentsOnly 14 pages are availabe for public view
 |  | from | 187 |  |  |
| | | from | 187 | | |
Abstract
This work is aimed to studying the characterization of chromium fluorosilicate glasses containing different concentrations of CrF2 by different experimental tools in order to receive information specifically about the paramagnetic behaviors of such glasses. Then effect of changing glass composition and effect of Gamma irradiation on the magnetic behaviors of the prepared materials are the main subjects of the present study. The present results showed that, X-ray diffraction (XRD) and selected area of electron diffraction (EDP) methods have been applied to differentiate between the amorphous ordered structural units in specific range ordered in the main matrix of the glasses. TEM and SEM microscopy are used to differentiate between separated and non- separated magnetic species. The magnetic properties of the as prepared samples were studied by means of EPR and vibrational magnetization spectroscopy (VSM). In this thesis, we have followed the structure changes in the network of silicate glasses containing chromium fluoride by using additional structural techniques. XRD and EDP spectroscopy are carried out differentiate between range ordered species upon CrF2 additions. TEM and SEM were used to study the morphological changes as a result of changing glass composition. In general, SEM, X-ray diffraction, EDX pattern and FTIR spectra of chromium fluoride containing glasses revealed nanostructure of silicate species. The type of crystalline silicate phases is found to have some direct effects on some material properties.