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Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method

Nanosized (10-70 nm) Al₂O₃ doped with manganese ions (Mn³⁺) was obtained by combustion method. It was found that the resulting powder consists of a mixture of transition aluminas (δ*, δ, θ), among which δ*-phase is dominant. It was shown that a part of Mn ions exists in the oxidation state +2 and oc...

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Main Authors:	Berezovskaya, I.V., Khomenko, O.V., Poletaev, N.I., Khlebnikova, M.E., Stoyanova, I.V., Efryushina, N.P., Dotsenko, V.P.
Format:	Article
Language:	English
Published:	НТК «Інститут монокристалів» НАН України 2018
Series:	Functional Materials
Subjects:	Characterization and properties
Online Access:	http://dspace.nbuv.gov.ua/handle/123456789/157177
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id	irk-123456789-157177
record_format	dspace
spelling	irk-123456789-1571772019-06-20T01:27:58Z Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method Berezovskaya, I.V. Khomenko, O.V. Poletaev, N.I. Khlebnikova, M.E. Stoyanova, I.V. Efryushina, N.P. Dotsenko, V.P. Characterization and properties Nanosized (10-70 nm) Al₂O₃ doped with manganese ions (Mn³⁺) was obtained by combustion method. It was found that the resulting powder consists of a mixture of transition aluminas (δ, δ, θ), among which δ-phase is dominant. It was shown that a part of Mn ions exists in the oxidation state +2 and occupies tetrahedral positions in δ-Al₂O₃, causing a broadband luminescence with a maximum at ~ 520 nm. Annealing in air at temperatures ≤1130 °C results in the formation of stable α-polymorph. It is shown that the δ, θ -> α-Al₂O₃ phase transition is followed by oxidation of Mn²⁺/Mn³⁺ ions and the stabilization of some amount of manganese ions in the oxidation state +4 on octahedral Al positions. 2018 Article Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method / I.V. Berezovskaya, O.V. Khomenko, N.I. Poletaev, M.E. Khlebnikova, I.V. Stoyanova, N.P. Efryushina, V.P. Dotsenko // Functional Materials. — 2018. — Т. 25, № 3. — С. 490-495. — Бібліогр.: 28 назв. — англ. 1027-5495 DOI:https://doi.org/10.15407/fm25.03.490 http://dspace.nbuv.gov.ua/handle/123456789/157177 en Functional Materials НТК «Інститут монокристалів» НАН України
institution	Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection	DSpace DC
language	English
topic	Characterization and properties Characterization and properties
spellingShingle	Characterization and properties Characterization and properties Berezovskaya, I.V. Khomenko, O.V. Poletaev, N.I. Khlebnikova, M.E. Stoyanova, I.V. Efryushina, N.P. Dotsenko, V.P. Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method Functional Materials
description	Nanosized (10-70 nm) Al₂O₃ doped with manganese ions (Mn³⁺) was obtained by combustion method. It was found that the resulting powder consists of a mixture of transition aluminas (δ, δ, θ), among which δ-phase is dominant. It was shown that a part of Mn ions exists in the oxidation state +2 and occupies tetrahedral positions in δ-Al₂O₃, causing a broadband luminescence with a maximum at ~ 520 nm. Annealing in air at temperatures ≤1130 °C results in the formation of stable α-polymorph. It is shown that the δ, θ -> α-Al₂O₃ phase transition is followed by oxidation of Mn²⁺/Mn³⁺ ions and the stabilization of some amount of manganese ions in the oxidation state +4 on octahedral Al positions.
format	Article
author	Berezovskaya, I.V. Khomenko, O.V. Poletaev, N.I. Khlebnikova, M.E. Stoyanova, I.V. Efryushina, N.P. Dotsenko, V.P.
author_facet	Berezovskaya, I.V. Khomenko, O.V. Poletaev, N.I. Khlebnikova, M.E. Stoyanova, I.V. Efryushina, N.P. Dotsenko, V.P.
author_sort	Berezovskaya, I.V.
title	Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method
title_short	Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method
title_full	Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method
title_fullStr	Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method
title_full_unstemmed	Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method
title_sort	oxidation states and microstructure of manganese impurity centers in nanosized al₂o₃ obtained by combustion method
publisher	НТК «Інститут монокристалів» НАН України
publishDate	2018
topic_facet	Characterization and properties
url	http://dspace.nbuv.gov.ua/handle/123456789/157177
citation_txt	Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method / I.V. Berezovskaya, O.V. Khomenko, N.I. Poletaev, M.E. Khlebnikova, I.V. Stoyanova, N.P. Efryushina, V.P. Dotsenko // Functional Materials. — 2018. — Т. 25, № 3. — С. 490-495. — Бібліогр.: 28 назв. — англ.
series	Functional Materials
work_keys_str_mv	AT berezovskayaiv oxidationstatesandmicrostructureofmanganeseimpuritycentersinnanosizedal2o3obtainedbycombustionmethod AT khomenkoov oxidationstatesandmicrostructureofmanganeseimpuritycentersinnanosizedal2o3obtainedbycombustionmethod AT poletaevni oxidationstatesandmicrostructureofmanganeseimpuritycentersinnanosizedal2o3obtainedbycombustionmethod AT khlebnikovame oxidationstatesandmicrostructureofmanganeseimpuritycentersinnanosizedal2o3obtainedbycombustionmethod AT stoyanovaiv oxidationstatesandmicrostructureofmanganeseimpuritycentersinnanosizedal2o3obtainedbycombustionmethod AT efryushinanp oxidationstatesandmicrostructureofmanganeseimpuritycentersinnanosizedal2o3obtainedbycombustionmethod AT dotsenkovp oxidationstatesandmicrostructureofmanganeseimpuritycentersinnanosizedal2o3obtainedbycombustionmethod
first_indexed	2023-05-20T17:51:38Z
last_indexed	2023-05-20T17:51:38Z
_version_	1796154257051746304

Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method

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