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Vitreous and glass-ceramics materials in the SiO2-Al2O3-MeO-M2O type system

S. PETRESCU1, M. MALKI2,3, M. CONSTANTINESCU1, E. M. ANGHEL1,* , I. ATKINSON1, R. STATE1, M. ZAHARESCU1

Affiliation

  1. Institute of Physical Chemistry “Ilie Murgulescu” of Romanian Academy, Spl. Independentei 202, 77208, Bucharest, Romania
  2. CNRS/CEMHTI-1D Av. de la Recherche Scientifique, 45701 Orléans cedex 2, France
  3. Polytech’ Orléans, Université d’Orléans, 8 rue Léonard de Vinci, 45072 Orléans cedex 2, France

Abstract

Several glasses in the SiO2-Al2O3-MeO-M2O system (where M stands for Na, K while Me represents Mg, Ca, Ba) were prepared by quenching method and their crystallization mechanism and microstructure evolution were investigated by DSC, X-ray diffraction (XRD), Raman spectroscopy and SEM. Multi-component fitting of the asymmetric and split DSC exotherms of crystallization was performed in order to establish crystallization behavior and the thermal stability as differences of the onset of the crystallization temperature (Ton) and the glass transition (Tg) for the investigated glasses. Their microstructure was correlated with the electrical conductivity measurements in solid phase. For instance electrical conductivity of three soda alkaline earth aluminosilicate glasses, called 20(Mg/Ca/Ba) glasses, with the same Na2O/SiO2 ratio increases in the succession 20Mg> 20Ba> 20Ca as the fraction of the non-bridging oxygen, fNBO, and their more depolymerized silicate species, Q1 and Q2 ..

Keywords

Glass, glass-ceramic, Differential Scanning Calorimetry (DSC), Raman spectroscopy, Microstructure, Electrical conductivity.

Submitted at: July 9, 2012
Accepted at: July 19, 2012

Citation

S. PETRESCU, M. MALKI, M. CONSTANTINESCU, E. M. ANGHEL, I. ATKINSON, R. STATE, M. ZAHARESCU, Vitreous and glass-ceramics materials in the SiO2-Al2O3-MeO-M2O type system, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 7-8, pp. 603-612 (2012)