Synthesis, X-Ray Structure Analysis, and Raman Spectroscopy of R2TiO5-Based (R = Sc, Y) Solid Solutions | Sciact - CRIS-система Института катализа

Synthesis, X-Ray Structure Analysis, and Raman Spectroscopy of R2TiO5-Based (R = Sc, Y) Solid Solutions Научная публикация

Журнал

Inorganic Materials
ISSN: 0020-1685 , E-ISSN: 1608-3172

Вых. Данные

Год: 2016, Том: 52, Номер: 5, Страницы: 483-489 Страниц : 7 DOI: 10.1134/s0020168516050095

Ключевые слова

synchrotron X-ray diffraction, Raman spectra, fluorite- and pyrochlore-like Sc(Y)2TiO5-based solid solutions

Авторы

Lyashenko L.P. ¹ , Shcherbakova L.G. ² , Karelin A.I. ¹ , Smirnov V.A. ¹ , Kulik E.S. ³ , Svetogorov R.D. ³ , Zubavichus Ya.V. ³

Организации

1	Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432 Russia
2	Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, 119991 Russia
3	National Research Centre Kurchatov Institute, pl. Kurchatova 1, Moscow, 123182 Russia

Order–disorder transitions in xR2O3 · (1 − x)TiO2 (R = Sc, 0.4 ≤ x ≤ 0.5; R = Y, 0.5 ≤ x ≤ 0.6) solid solutions with highly imperfect fluorite-derived structures have been studied using monochromatic synchrotron X-ray diffraction and Raman spectroscopy. The results demonstrate that the synthesis process leads to the formation of a fluorite-like (Fm3m) disordered phase and a nanoscale (~10–100 nm) pyrochlore-like (Fd3m) ordered phase of the same composition, coherent with the disordered phase. We have determined their lattice parameters. The Raman spectra of Sc2TiO5 (Y2TiO5) contain broad lines in low- and high-frequency regions: at 190, 350, and 775 (134, 188, 365, 404, and 727) cm−1. These lines are characteristic of a pyrochlore-like phase with a varying degree of order and a disordered fluorite-like phase, respectively. The pyrochlore-like phase Y2Ti2O7 has two strong Raman peaks in the low-frequency region: at 312 and 527 cm−1. The formation of nanodomains with different degrees of order is caused by the internal stress that arises from the high density of structural defects in the unit cells of the solid solutions.

Lyashenko L.P. , Shcherbakova L.G. , Karelin A.I. , Smirnov V.A. , Kulik E.S. , Svetogorov R.D. , Zubavichus Y.V.
Synthesis, X-Ray Structure Analysis, and Raman Spectroscopy of R2TiO5-Based (R = Sc, Y) Solid Solutions
Inorganic Materials. 2016. V.52. N5. P.483-489. DOI: 10.1134/s0020168516050095 WOS Scopus РИНЦ CAPlus OpenAlex

Ляшенко Л.П. , Щербакова Л.Г. , Карелин А.И. , Смирнов В.А. , Кулик Э.С. , Светогоров Р.Д. , Зубавичус Я.В.
Синтез и исследование методами рентгеноструктурного анализа и спектроскопии комбинационного рассеяния света твердых растворов на основе R2TiO5 (R – Sc, Y)
Неорганические материалы. 2016. Т.52. №5. С.530-536. DOI: 10.7868/S0002337X16050092 РИНЦ OpenAlex

Поступила в редакцию:	25 мая 2015 г.
Принята к публикации:	11 нояб. 2015 г.
Опубликована в печати:	1 мая 2016 г.
Опубликована online:	13 мая 2016 г.

Web of science:	WOS:000376259200008
Scopus:	2-s2.0-84969771766
РИНЦ:	27153951
Chemical Abstracts:	2016:782472
OpenAlex:	W2350748436

БД	Цитирований
Web of science	7
Scopus	7
OpenAlex	5