Electrical Conductivity in the Molten and Glassy States of  the Li2(O, Cl2, I2)-B2O3 system

Eftekhari Yekta, Bijan; Banapour Ghafari, Omid

doi:10.22068/ijmse.3300

Volume 20, Issue 4 (December 2023) IJMSE 2023, 20(4): 1-9 | Back to browse issues page

‎ 10.22068/ijmse.3300

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Eftekhari Yekta B, Banapour Ghafari O. Electrical Conductivity in the Molten and Glassy States of the Li2(O, Cl2, I2)-B2O3 system. IJMSE 2023; 20 (4) :1-9
URL: http://ijmse.iust.ac.ir/article-1-3300-en.html

Electrical Conductivity in the Molten and Glassy States of the Li2(O, Cl2, I2)-B2O3 system

Bijan Eftekhari Yekta

, Omid Banapour Ghafari

Abstract: (7913 Views)

Glasses in the B₂O₃-Li₂(O, Cl₂, I₂) system were prepared through the conventional melt-quenching method. Then, the conductivity of the molten and glassy states of these compositions was evaluated. Furthermore, the thermal and crystallization behavior of the glasses was determined using simultaneous thermal analysis (STA) and X-ray diffractometry (XRD). The electrical conductivity of the melts was measured at temperatures ranging from 863 to 973 K, and the activation energy of the samples was calculated using the data obtained from ion conduction in the molten state and found to be in the vicinity of 32 kcal/mol. In glassy states, electrical conductivity was also measured. To determine this property, the electrochemical impedance spectroscopy method (EIS) was used. In the molten state, temperature played an important role in the ion conductivity; however, at lower temperatures, other factors became important. Based on the results, the addition of LiI and LiCl to the B₂O₃-Li₂O base glass system (75 B₂O₃, 10 Li₂O, 7.5 LiI, 7.5 LiCl) (mol%) increases the ionic conductivity of the glass from 3.2 10^-8S.cm^-1 to 1.4 10^-7S.cm^-1 at 300 K.

Keywords: ion conduction in glass melts, activation energy, electrochemical impedance spectroscopy