Electrical Relaxation and Transport in 0.5Cs2O- 0.5Li2O-3B2O3 Glasses

TL;DR

This study investigates the dielectric and electrical conductivity properties of 0.5Cs2O-0.5Li2O-3B2O3 glasses across a range of frequencies and temperatures, revealing their potential for energy storage applications.

Contribution

It provides detailed analysis of dielectric and conductivity behaviors in this specific glass system, highlighting their suitability for electrical energy storage devices.

Findings

Dielectric constant increases with temperature, showing anomalies near glass transition and crystallization.

Activation energy for relaxation and conduction are closely matched (~1.7 eV).

Electrical conductivity follows Jonscher's power law, indicating typical ionic conduction behavior.

Abstract

The frequency and temperature dependence of the dielectric constant and the electrical conductivity of the transparent glasses in the composition 0.5Cs2O-0.5Li2O-3B2O3 (CLBO) were investigated in the 100 Hz - 10 MHz frequency range. The dielectric constant for the as-quenched glass increased with increasing temperature, exhibiting anomalies in the vicinity of the glass transition and crystallization temperatures. The temperature coefficient of dielectric constant was estimated (35 \pm 2 ppm.K-1) using Havinga's formula. The dielectric loss at 313 K is 0.005 \pm 0.0005 at all the frequencies understudy. The activation energy associated with the electrical relaxation determined from the electric modulus spectra was found to be 1.73 \pm 0.05 eV, close to that of the activation energy obtained for DC conductivity (1.6 \pm 0.06 eV). The frequency dependent electrical conductivity was analyzed using Jonscher's power law. The combination of these dielectric characteristics suggests that these are good candidates for electrical energy storage device applications.