Dielectric behavior in erbium-doped tellurite glass for potential  high-energy capacitor

Muhammad Noorazlan Abd Azis

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Type :	article
Subject :	Q Science (General)
Main Author :	Muhammad Noorazlan Abd Azis
Additional Authors :	Halimah Mohamed Kamari M. K. Halimah A. B. Suriani
Title :	Dielectric behavior in erbium-doped tellurite glass for potential high-energy capacitor

Place of Production :	Tanjong Malim
Publisher :	Fakulti Sains dan Matematik
Year of Publication :	2019
Corporate Name :	Universiti Pendidikan Sultan Idris

Abstract : Universiti Pendidikan Sultan Idris

The use of erbium ions, Er3+ to enhance the dielectric properties is investigated in tellurite glass system for the frst time, tothe best of our knowledge. A glass series of tellurite glass with chemical composition, {[(TeO2)70(B2O3)30]70(ZnO)30}100−y(Er2O3)y (y = 0, 0.005, 0.01, 0.02, 0.03, 0.04 and 0.05) was fabricated via melt-quenched technique. The X-ray difraction and Fourier transform infrared spectroscopy analysis proved the amorphous structure and the formation of nonbridging oxygen in the glass system. The Er3+ ions afect greatly to the dielectric constant, ε′ in which the dielectric constant, ε′ show high value at a lower frequency and higher temperature (above 110 °C). The reduction of dielectric constant, ε′ is found with the increment value of frequency, which corresponds to the formation of the hindrance efect on heavy dipoles caused by the mixed transition-ion efect. Meanwhile, the dielectric constant, ε′ is enhanced with the increase of temperature. The activation energy of the glass system is found to decrease, which is due to the high polarizability of Er3+ ions in the glass system. Based on these results, the erbium-doped tellurite glass is a potential kind of high-energy capacitor.

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