Valence state conversion of Mn ions in Li2O–ZnO-GeO2 glass-ceramics: Spectral, structural, ESR and XRF studies; Ceramics International; Vol. 50, iss. 11, Pt. B

Valence state conversion of Mn ions in Li2O–ZnO-GeO2 glass-ceramics: Spectral, structural, ESR and XRF studies; Ceramics International; Vol. 50, iss. 11, Pt. B

Sonraí bibleagrafaíochta
Parent link:Ceramics International.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 50, iss. 11, Pt. B.— 2024.— P. 19592-19603
Údar corparáideach: National Research Tomsk Polytechnic University
Rannpháirtithe: Kulpina E. V., Babkina A. N. Anastasiya Nikolaevna, Zyryanova K. S. Kseniya Sergeevna, Kuzmenko N. K. Nataljya Konstantinovna, Ignatjev A. I. Aleksandr Ivanovich, Valiev D. T. Damir Talgatovich, Stepanov S. A. Sergey Aleksandrovich, Pankin D. O. Dmitry Olegovich, Povolotskaya A. Anastasiya, Platonova N. V. Nataliya Vladimirovna, Shendrik R. Roman
Achoimre:Title screen
Lithium-zinc-germanate glass-ceramics doped with Mn ions are synthesized by volume crystallization method. Structural studies show nucleation of different forms of lithium germanate crystals depending on the isothermal treatment regime of the initial glass. With the increase of the heat treatment temperature and the lithium content in the initial glass, the [GeO4] /[GeO6] ratio in the nucleated crystalline phases increases. The initial distribution of Mn2+/Mn3+/Mn4+ is defined by the Li2O/ZnO ratio in the glass composition: the ratio growth increases the contribution of Mn4+ over the Mn2+ and Mn3+. Low-temperature heat treatment of initial glass leads to uprise of intense red emission of Mn4+ ions in the octahedral environment. High-temperature heat treatment leads to occurrence of intense green emission related to Mn2+ ions in a tetrahedral environment. Discussions on all transformations of symmetry, the crystal field strength of Mn ions’ environment and their valence state based on the results of optical spectroscopy, ESR and XRF studies are provided. The maximum quantum yield of red luminescence is 61%, and of green luminescence is 23%. The synthesized glass-ceramics can be used as a luminescent converter of the UV LED radiation with the maximum energy efficiency of 20%
Текстовый файл
AM_Agreement
Teanga:Béarla
Foilsithe / Cruthaithe: 2024
Ábhair:
электронный ресурс
труды учёных ТПУ
luminescent glass-ceramics
tetravalent manganese
divalent manganese
ESR
red-to-green conversion
XRF
Rochtain ar líne:https://doi.org/10.1016/j.ceramint.2024.03.076
Formáid: Leictreonach Caibidil leabhair
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=672808

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