AC conductivity and dielectric properties of 98[20Li2O-xBi2O3-(80-x)TeO2]-2Ag mixed ionic-electronic glasses
Autor: | N. M. Samsudin, R. Hisam, E. S. Sazali, M. S. Sutrisno |
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Rok vydání: | 2021 |
Předmět: |
010302 applied physics
Materials science Relaxation (NMR) Analytical chemistry Ionic bonding chemistry.chemical_element Blocking effect Dielectric Condensed Matter Physics 01 natural sciences Oxygen Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Ion chemistry 0103 physical sciences Ionic conductivity Electrical and Electronic Engineering Natural bond orbital |
Zdroj: | Journal of Materials Science: Materials in Electronics. |
ISSN: | 1573-482X 0957-4522 |
DOI: | 10.1007/s10854-021-05246-5 |
Popis: | Mixed ionic-electronic 98[20Li2O-xBi2O3-(80-x)TeO2]-2Ag (x = 3, 5, 7, 11, 13 and 15 mol%) glasses were prepared by melt-quenching technique to investigate their AC conductivity and dielectric properties. Structural analysis revealed the increase of non-bridging oxygen (NBO) up to x = 5 mol% before dropping at x = 7 mol% followed by a further increase at x > 7 mol%. The nonlinear behaviour of AC conductivity with Bi2O3 showed an initial increase in $$\sigma$$ AC until reaching a minimum at x = 7 and 11 mol% before increasing again at x > 11 mol%. The minimum is suggested to be due to the blocking effects of Bi2O3 towards ionic conduction caused by mixed ionic-electronic (MIE) effect. Other than that, dielectric constant displayed an anomalous decrease at x = 7 mol% followed by a steep increase at x > 7 mol%. This decrease could also be related to blocking effects induced by MIE that contributes to a reduction of space charge polarization. The anomalous decrease at x = 7 mol% coincided with a minimum of $$\sigma$$ AC for the same glass composition. Meanwhile, another nonlinear behaviour is observed on M′ with a maximum at x = 7 and 11 mol% which coincided with the location of $$\sigma$$ AC minimum that may be due to MIE effect attributed to the blocking effect of Bi2O3 to migrating ions which then led to high resistance. Electrical modulus analysis reveals the non-Debye relaxation nature for the glass samples indicating the presence of dynamic ions processes. |
Databáze: | OpenAIRE |
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