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Multifunctional GaFeO(3) Obtained via Mechanochemical Activation Followed by Calcination of Equimolar Nano-System Ga(2)O(3)–Fe(2)O(3)

The equimolar oxide mixture β-Ga(2)O(3)—α-Fe(2)O(3) was subjected to high-energy ball milling (HEBM) with the aim to obtain the nanoscaled GaFeO(3) ortho-ferrite. X-ray diffraction, (57)Fe Mössbauer spectroscopy, and transmission electron microscopy were used to evidence the phase structure and evol...

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Autores principales: Diamandescu, Lucian, Tolea, Felicia, Feder, Marcel, Vasiliu, Florin, Mercioniu, Ionel, Enculescu, Monica, Popescu, Traian, Popescu, Bogdan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7824229/
https://www.ncbi.nlm.nih.gov/pubmed/33383656
http://dx.doi.org/10.3390/nano11010057
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author Diamandescu, Lucian
Tolea, Felicia
Feder, Marcel
Vasiliu, Florin
Mercioniu, Ionel
Enculescu, Monica
Popescu, Traian
Popescu, Bogdan
author_facet Diamandescu, Lucian
Tolea, Felicia
Feder, Marcel
Vasiliu, Florin
Mercioniu, Ionel
Enculescu, Monica
Popescu, Traian
Popescu, Bogdan
author_sort Diamandescu, Lucian
collection PubMed
description The equimolar oxide mixture β-Ga(2)O(3)—α-Fe(2)O(3) was subjected to high-energy ball milling (HEBM) with the aim to obtain the nanoscaled GaFeO(3) ortho-ferrite. X-ray diffraction, (57)Fe Mössbauer spectroscopy, and transmission electron microscopy were used to evidence the phase structure and evolution of the equimolar nano-system β-Ga(2)O(3)—α-Fe(2)O(3) under mechanochemical activation, either as-prepared or followed by subsequent calcination. The mechanical activation was performed for 2 h to 12 h in normal atmosphere. After 12 h of HEBM, only nanoscaled (~20 nm) gallium-doped α-Fe(2)O(3) was obtained. The GaFeO(3) structure was obtained as single phase, merely after calcination at 950 °C for a couple of hours, of the sample being subjected to HEBM for 12 h. This temperature is 450 °C lower than used in the conventional solid phase reaction to obtain gallium orthoferrite. The optical and magnetic properties of representative nanoscaled samples, revealing their multifunctional character, were presented.
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spelling pubmed-78242292021-01-24 Multifunctional GaFeO(3) Obtained via Mechanochemical Activation Followed by Calcination of Equimolar Nano-System Ga(2)O(3)–Fe(2)O(3) Diamandescu, Lucian Tolea, Felicia Feder, Marcel Vasiliu, Florin Mercioniu, Ionel Enculescu, Monica Popescu, Traian Popescu, Bogdan Nanomaterials (Basel) Article The equimolar oxide mixture β-Ga(2)O(3)—α-Fe(2)O(3) was subjected to high-energy ball milling (HEBM) with the aim to obtain the nanoscaled GaFeO(3) ortho-ferrite. X-ray diffraction, (57)Fe Mössbauer spectroscopy, and transmission electron microscopy were used to evidence the phase structure and evolution of the equimolar nano-system β-Ga(2)O(3)—α-Fe(2)O(3) under mechanochemical activation, either as-prepared or followed by subsequent calcination. The mechanical activation was performed for 2 h to 12 h in normal atmosphere. After 12 h of HEBM, only nanoscaled (~20 nm) gallium-doped α-Fe(2)O(3) was obtained. The GaFeO(3) structure was obtained as single phase, merely after calcination at 950 °C for a couple of hours, of the sample being subjected to HEBM for 12 h. This temperature is 450 °C lower than used in the conventional solid phase reaction to obtain gallium orthoferrite. The optical and magnetic properties of representative nanoscaled samples, revealing their multifunctional character, were presented. MDPI 2020-12-29 /pmc/articles/PMC7824229/ /pubmed/33383656 http://dx.doi.org/10.3390/nano11010057 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Diamandescu, Lucian
Tolea, Felicia
Feder, Marcel
Vasiliu, Florin
Mercioniu, Ionel
Enculescu, Monica
Popescu, Traian
Popescu, Bogdan
Multifunctional GaFeO(3) Obtained via Mechanochemical Activation Followed by Calcination of Equimolar Nano-System Ga(2)O(3)–Fe(2)O(3)
title Multifunctional GaFeO(3) Obtained via Mechanochemical Activation Followed by Calcination of Equimolar Nano-System Ga(2)O(3)–Fe(2)O(3)
title_full Multifunctional GaFeO(3) Obtained via Mechanochemical Activation Followed by Calcination of Equimolar Nano-System Ga(2)O(3)–Fe(2)O(3)
title_fullStr Multifunctional GaFeO(3) Obtained via Mechanochemical Activation Followed by Calcination of Equimolar Nano-System Ga(2)O(3)–Fe(2)O(3)
title_full_unstemmed Multifunctional GaFeO(3) Obtained via Mechanochemical Activation Followed by Calcination of Equimolar Nano-System Ga(2)O(3)–Fe(2)O(3)
title_short Multifunctional GaFeO(3) Obtained via Mechanochemical Activation Followed by Calcination of Equimolar Nano-System Ga(2)O(3)–Fe(2)O(3)
title_sort multifunctional gafeo(3) obtained via mechanochemical activation followed by calcination of equimolar nano-system ga(2)o(3)–fe(2)o(3)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7824229/
https://www.ncbi.nlm.nih.gov/pubmed/33383656
http://dx.doi.org/10.3390/nano11010057
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