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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| Zitieren: | 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. |
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Berezovskaya, I.V. Khomenko, O.V. Poletaev, N.I. Khlebnikova, M.E. Stoyanova, I.V. Efryushina, N.P. Dotsenko, V.P. 2019-06-19T16:45:58Z 2019-06-19T16:45:58Z 2018 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 https://nasplib.isofts.kiev.ua/handle/123456789/157177 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. en НТК «Інститут монокристалів» НАН України Functional Materials Characterization and properties Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method Article published earlier |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Oxidation states and microstructure of manganese impurity centers in nanosized Al₂O₃ obtained by combustion method |
| spellingShingle |
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 |
| 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 |
| 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. |
| topic |
Characterization and properties |
| topic_facet |
Characterization and properties |
| publishDate |
2018 |
| language |
English |
| container_title |
Functional Materials |
| publisher |
НТК «Інститут монокристалів» НАН України |
| format |
Article |
| 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.
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| issn |
1027-5495 |
| url |
https://nasplib.isofts.kiev.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. |
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| first_indexed |
2025-12-07T19:58:27Z |
| last_indexed |
2025-12-07T19:58:27Z |
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