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Structure and magnetic properties of BeO-Fe2O3-Al2O3-TeO2 glass-ceramic composites

Abstract

In this work, glass-ceramics in the xBeO–20Fe2O3–(80-x)TeO2 system with x = 0–25 mol% were synthesized by the traditional melt quenching route and studied by inductively coupled plasma optical emission spectroscopy, X-ray diffraction, confocal microscopy, infrared and Raman spectroscopy. BeO addition was found to support the crystallization process of Fe2O3 during melting, and an increased BeO content was associated with an increased fraction of the crystalline Fe2O3 phase and an increased size of these crystallites. Furthermore, samples doped with BeO exhibit an increasing polymerization of the residual tellurite glass network compared to the undoped sample. The magnetic properties and specific heat of all synthesized materials were measured, and the results show that all studied samples behave as spin-glasses. Also, the Morin transition of hematite was observed at 260 K with intensity depending on the material content in Fe2O3 crystalline phase, the formation of which correlates with the amount of added BeO.

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY no. 41, pages 5214 - 5222,
ISSN: 0955-2219
Language:
English
Publication year:
2021
Bibliographic description:
Wójcik N., Tagiara N., Ali S., Górnicka K., Segawa H., Klimczuk T., Jonson B., Möncke D., Kamitsos E.: Structure and magnetic properties of BeO-Fe2O3-Al2O3-TeO2 glass-ceramic composites// JOURNAL OF THE EUROPEAN CERAMIC SOCIETY -Vol. 41,iss. 10 (2021), s.5214-5222
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.jeurceramsoc.2021.04.005
Verified by:
Gdańsk University of Technology

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