Influence of mixed modifier fluoride on tuning the AC and dielectric properties of xBaF2(50x)CaF250B2O3 glass system

Muhammad Noorazlan Abd Azis

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Type :	article
Subject :	Q Science (General)
ISSN :	0947-7047
Main Author :	Muhammad Noorazlan Abd Azis
Title :	Influence of mixed modifier fluoride on tuning the AC and dielectric properties of xBaF2(50x)CaF250B2O3 glass system

Place of Production :	Tanjung Malim
Publisher :	Fakulti Sains dan Matematik
Year of Publication :	2023
Notes :	Ionics
Corporate Name :	Universiti Pendidikan Sultan Idris
HTTP Link :	Click to view web link

Abstract : Universiti Pendidikan Sultan Idris

This study examined the effect of mixed alkaline earth modifier fluoride on AC conductivity and dielectric properties in xBaF2–(50–x)CaF2–50B2O3 (x = 5–35 mol%) glass system. The impedance data showed a single-depressed semicircle with decreasing bulk resistance (Rb) with temperature. The change of σAC implied a non-linear relationship with BaF2, which induced a blocking effect on the mobility of the charge carriers at x ≤ 20 mol%, indicating the Mixed Alkaline Earth Effect (MAEE). The abrupt increase at x = 25 mol% was associated with the expansion of the glass network due to the formation of Non-Bridging Oxygen (NBO). All glass samples followed the Overlapping Large-Polaron Tunneling (OLPT) model for the conduction mechanism. The change in ε′ more prominent in low-frequency regions, signifying that polarization was contributed mainly by the space charge polarization. Electrical modulus analysis revealed non-Debye type relaxation, indicating temperature- and composition-dependent dynamic ion processes. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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