Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Mechanism of hopping conduction in Be–Fe–Al–Te–O semiconducting glasses and glass–ceramics
Δημιουργός/Συγγραφέας:	Wójcik, Natalia A. Tagiara, Nagia S. Möncke, Doris [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Ali, Sharafat Ryl, Jacek Barczyński, Ryszard J.
Ημερομηνία:	2022
Γλώσσα:	Αγγλικά
ISSN:	0022-2461 1573-4803
DOI:	10.1007/s10853-021-06834-w
Περίληψη:	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.
Τίτλος πηγής δημοσίευσης:	Journal of Materials Science
Τόμος/Κεφάλαιο:	57
Τεύχος:	3
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	Electrical properties of glasses and glass- ceramics Beryllium-alumino-tellurite glasses Impedance spectroscopy
EU Grant:	STING National Infrastructure in Nanotechnology, Advanced Materials and Micro-/Nanoelectronics
EU Grant identifier:	MG 2018-7558 MIS 5002772
Κάτοχος πνευματικών δικαιωμάτων:	The Author(s) 2022
Όροι και προϋποθέσεις δικαιωμάτων:	This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://link.springer.com/article/10.1007/s10853-021-06834-w
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο