Bih, L. and Abbas, L. and Azrour, M. and El Amraoui, Y. and Nadiri, A. (2005) EPR investigation and thermal study of yA2O-(1-y)0.25(WO 3)2-0.75(P2O5) (A=Li, Na) glasses. Journal of Thermal Analysis and Calorimetry, 81 (1). pp. 57-60.

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Abstract

Glasses belonging to the series yA2O-(1-y)0.25(WO 3)2-0.75P2O5 (y=0.10-0.60) are elaborated. DTA experiments reveal that the glass-network of the glasses are broken with increasing of modifier content. EPR spectra show the presence of two signals due to W5+ and Mo5+, as impuritie. The intensity of these EPR centres decreases when the concentration of A2O increases. The variation of T g upon the modifier content is ascribed to structural changes occurring in the matrix of these glasses. © 2005 Akadémiai Kiadó, Budapest.

Item Type: Article
Uncontrolled Keywords: Composition; Concentration (process); Crosslinking; Differential thermal analysis; Glass transition; Paramagnetic resonance; Phosphates; Quenching; X ray diffraction analysis, Bond strength; Cross-link density; EPR spectra; Phosphotungstate glasses, Metallic glass
Subjects: Chemistry
Divisions: SCIENTIFIC PRODUCTION > Chemistry
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:45
URI: http://eprints.umi.ac.ma/id/eprint/2057

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