NDLI: Effects of the substitution of P2O5 by B2O3 on the structure and dielectric properties in (90-x) P2O5-xB2O3-10Fe2O3 glasses.

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Effects of the substitution of P2O5 by B2O3 on the structure and dielectric properties in (90-x) P2O5-xB2O3-10Fe2O3 glasses.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Mokhtar, F. Elhouichet, H. Sdiri, N. Dhaou, H.
Description	Author Affiliation: Sdiri N ( Unité de recherche, Matériaux nouveaux et dispositifs électroniques organiques Faculté des sciences de Monastir, Université de Monastir, Avenue de l'environnement, 5019 Monastir, Tunisia. Electronic address: sdirinasr@yahoo.fr.)
Abstract	90%[xB2O3 (1-x) P2O5] 10%Fe2O3, glass systems where (x=0 mol%, 5 mol%, 10 mol%, 15 mol%, 20 mol%) was prepared via a melt quenching technique. The structure of glass is investigated at room temperature by, Raman and EPR spectroscopy. Raman studies have been performed on these glasses to examine the distribution of different borate and phosphate structural groups. We have noted an increase from 3 to 4 in the coordination number of the boron atoms from 3 to 4, i.e., the conversion of the BO3 triangular structural units into BO4 tetrahedra. The samples have been investigated by means of electron paramagnetic resonance (EPR). The results obtained from the gef=4.28 EPR line are typical of the occurrence of iron (III) occupying substitutional sites. Moreover, the dielectric sizes such as Îµ'(ω), Îµâ ³(ω), imaginary parts of the electrical modulus, M(*)(ω) and the loss tanÎ´, their variation with frequency at room temperature show a decrease in relaxation intensity with an increase in the concentration of (B2O3). On the present work, we have found a weak extinction index with our new glass.
ISSN	13861425
Volume Number	117
e-ISSN	18733557
Journal	Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Language	English
Publisher	Elsevier
Publisher Date	2014-01-03
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Boron Compounds Chemistry Electric Impedance Ferric Compounds Glass Phosphorus Compounds Electron Spin Resonance Spectroscopy Spectrum Analysis, Raman Journal Article Discipline Spectroscopy
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation

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