Dynamical behavior of Ag ions on structural and dielectric features of As2O3 glass ceramics containing chalcogenide oxides

•As2O3 glass ceramics mixed with SeO2 and TeO2 and doped with Ag2O were prepared.•Characterization indicated entrenchment of Ag3AsO4 phase and Ag0 MPs in the samples.•ε′, σac exhibited increase with Ag2O beyond 0.5 mol% due to increase of Ag0 MPs.•σac variation with Ag2O content was analyzed using d...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2023-06, Vol.610, p.122299, Article 122299
Main Authors: Suryanarayana, V., Sekhar, A. Venkata, Bafti, A., Pavić, L., Reddy, A. Siva Sesha, Reddy, G. Naga Koti, Venkatramaiah, N., Kumar, V. Ravi, Veeraiah, N.
Format: Article
Language:English
Subjects:
A.C. conductivity
Ag ions
As2O3 glass ceramics
Chalcogenide oxides
Dielectric properties
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Summary:•As2O3 glass ceramics mixed with SeO2 and TeO2 and doped with Ag2O were prepared.•Characterization indicated entrenchment of Ag3AsO4 phase and Ag0 MPs in the samples.•ε′, σac exhibited increase with Ag2O beyond 0.5 mol% due to increase of Ag0 MPs.•σac variation with Ag2O content was analyzed using different conduction mechanisms.•Samples with > 0.5 mol% of Ag2O are preferable to achieve high ionic conductivity. In this work, As2O3 glasses mixed with two chalcogenide oxides (SeO2 and TeO2) and doped with varied contents of Ag2O were prepared and heat-treated. Characterized by various techniques suggested that these glasses were embedded with Ag3AsO4 crystal phases and Ag0 metallic particles (MPs). Later, different dielectric parameters viz., dielectric constant (ε′), electric modulus (M), electrical impedance (Z). conductivity a.c. conductivity a.c. conductivity and σac were measured over broad frequency (ω) and temperature (T) regions. Observed decrement in ε′, σac with Ag2O up to 0.5 mol% was understood due to the increased fraction of As5+ ions that occupy network-forming positions with AsO4 units. The observed increase of these parameters with Ag2O beyond 0.5 mol% was attributed to the growing fraction of Ag0 MPs that acted as modifiers. The variation of σac with Ag2O content was analyzed using different conduction mechanisms. Overall, it is predicted that greater than 0.5 mol% of silver oxide is preferable for achieving better ionic conductivity in these glasses
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2023.122299