Microstructural Characterization and Local Ordering of Fluorophosphate Ternary MnF2– NaPO3-ZnF2 Glasses
Z.G. Ivanova1, T. Djouama2, M. Poulain3, J. Teteris4
1Z.G. Ivanova, Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria.
2T. Djouama, Laboratoire d’Electronique Quantique, USTHB Bab-Ezzouar, Alger, Algeria.
3M. Poulain, Sciences Chimiques, Université de Rennes1, Campus de Beaulieu, Rennes, France.
4J. Teteris, Institute of Solid State Physics, University of Latvia, Riga, Latvia.
Manuscript received on December 04, 2016. | Revised Manuscript received on December 11, 2016. | Manuscript published on December 15, 2016. | PP: 14-18 | Volume-4 Issue-8, December 2016. | Retrieval Number: G1014094716/2017©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: The investigation of physicochemical properties of glasses in connection with their structure and potential applications is an important field of studies. In this work, the microstructural nature of ternary glasses from the MnF2 -NaPO3 – ZnF2 system has been evaluated by such structure-sensitive parameters as the glass transition temperature (Tg), Vickers microhardness (HV) and their relation. These glasses possess relatively high values of Tg (240-290 oC) and HV (160-275 kg.mm-2). Based on the free-volume theory, the average volume of microvoids (Vh), their formation energy (Eh) and the module of elasticity (Em) have been determined. The relationship between them and the glass composition has been specified. The observed changes in the variation of these parameters have been discussed by the data from Raman scattering and infrared absorption of the glasses studied.
Keywords: Fluorophosphate glasses; Physical properties; Local structure.