Mechanism of hopping conduction in Be–Fe–Al–Te–O semiconducting glasses and glass–ceramics

Natalia Anna Wójcik; Nagia S. Tagiara; Doris Möncke; Efstratios Kamitsos; Sharafat Ali; Jacek Ryl; Ryszard Jan Barczyński

doi:10.1007/s10853-021-06834-w

Mechanism of hopping conduction in Be–Fe–Al–Te–O semiconducting glasses and glass–ceramics

Abstract

Electrical properties of beryllium-alumino-tellurite glasses and glass–ceramics doped with iron ions were studied using impedance spectroscopy. The conductivity was measured over a wide frequency range from 10 mHz to 1 MHz and the temperature range from 213 to 473 K. The D.C. conductivity values showed a correlation with the Fe-ion concentration and ratio of iron ions on different valence states in the samples. On the basis of Jonscher universal dielectric response the temperature dependence of conductivity parameters were determined and compared to theoretical models collected by Elliott. In glasses, the conduction process was found to be due to the overlap polaron tunneling while in glass–ceramics the quantum mechanical tunneling between semiconducting crystallites of iron oxides is proposed. The D.C. conductivity was found not to follow Arrhenius relation. The Schnakenberg model was used to analyze the conductivity behavior and the polaron hopping energy and disorder energy were estimated. Additionally, the correlation between alumina dissolution and basicity of the melts was observed.

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Authors (7)

Natalia Anna Wójcik (formerly: Natalia Wójcik) dr hab. inż.
Nagia S. Tagiara
Doris Möncke profesor
Efstratios Kamitsos profesor
Sharafat Ali profesor
Jacek Ryl dr hab. inż.
Ryszard Jan Barczyński (formerly: Ryszard Barczyński) dr hab. inż.

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Articles

Type:

artykuły w czasopismach

Published in:

JOURNAL OF MATERIALS SCIENCE no. 57, pages 1633 - 1647,
ISSN: 0022-2461

Language:

English

Publication year:

2022

Bibliographic description:

Wójcik N., Tagiara N. S., Möncke D., Kamitsos E., Ali S., Ryl J., Barczyński R.: Mechanism of hopping conduction in Be–Fe–Al–Te–O semiconducting glasses and glass–ceramics// JOURNAL OF MATERIALS SCIENCE -Vol. 57, (2022), s.1633-1647

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