Flat Dielectric Response in 3BaO-3TiO2-B2O3 Glasses

TL;DR

This study investigates the dielectric properties of 3BaO-3TiO2-B2O3 glasses, confirming their amorphous nature and analyzing their temperature and frequency-dependent dielectric behavior relevant for capacitor applications.

Contribution

It provides detailed dielectric measurements and analysis of these glasses, demonstrating their potential for capacitor use and understanding their dielectric response.

Findings

Dielectric constant is frequency independent between 323-473 K.

Dielectric behavior follows the universal dielectric response.

Dielectric constant at 323 K is approximately 17 with low loss.

Abstract

X-ray powder diffraction (XRD) along with differential thermal analysis (DTA) carried out on the as-quenched samples in the 3BaO-3TiO2-B2O3 system confirmed their amorphous and glassy nature, respectively. The dielectric constants in the 1 kHz-1 MHz frequency range were measured as a function of temperature (323-748 K). The dielectric constant and loss were found to be frequency independent in the 323-473 K temperature range. The dielectric behavior was consistent with the universal dielectric response (UDR). The temperature coefficient of dielectric constant was estimated using Havinga's formula and found to be 16 ppm.K-1. The electrical relaxation was rationalized using the electric modulus formalism. The dielectric constant and loss were 17 \pm 0.5 and 0.005 \pm 0.001, respectively at 323 K in the 1 kHz-1 MHz frequency range which may be of considerable interest to capacitor industry.