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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electrical conductivity of silicate glasses with tetravalent cations substituting Si

Full text
Author(s):
Braunger, M. L. [1] ; Escanhoela, C. A. [2] ; Fier, I. [3] ; Walmsley, L. [3] ; Ziemath, E. C. [3]
Total Authors: 5
Affiliation:
[1] UNESP, Dept & Fis Quim Biol, FCT, Presidente Prudente, SP - Brazil
[2] Univ Sao Paulo, Sao Carlos, SP - Brazil
[3] UNESP, Dept Fis, IGCE, Rio Claro, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Non-Crystalline Solids; v. 358, n. 21, p. 2855-2861, OCT 15 2012.
Web of Science Citations: 19
Abstract

The effects of substituting Si by M4+ cations in soda-lime silica glasses were analyzed by impedance spectroscopy in the frequency range of 1 Hz-1 MHz. The glass composition was (mol%) 22Na(2)O center dot 8CaO center dot 65SiO(2)center dot 5MO(2), M = Si, Ti, Ge, Zr, Sn, and Ce. Although the Na+ concentration in the glasses is constant, the Zr-containing glass exhibits the highest dc conductivity and the lowest activation energy, while the Ce-containing glass exhibits the lowest conductivity. The activation energies obtained experimentally agree with those obtained by a theoretical equation proposed by Anderson and Stuart. The differences in electrical conductivity presented by the several M-containing glasses are attributed to the effect that the M4+ ion has on the mobility of the diffusing Na+ ion. (C) 2012 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 08/07238-4 - Electric conductivity and thermal poling of soda-lime-silica glasses with tetravalent cations
Grantee:Carlos Augusto Escanhoela Júnior
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 08/07304-7 - Impedance Spectroscopy of 22Na2O.8CaO.65SiO2.5MO2 (M = Si, Ti, Ge, Zr, Sn, Ce) Glasses, without and with Ag+-Na+ Ion Exchange
Grantee:Maria Luisa Braunger Fier
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 05/04397-6 - Vickers hardness and fracture toughness of glasses with composition 22Na2O.8CaO.5MO2.65SiO2 (M = Si, Ti, Ge, Zr, Sn, Ce)
Grantee:Ervino Carlos Ziemath
Support Opportunities: Regular Research Grants