Fluorite-Pyrochlore Phase Transition in Nanostructured Ln2Hf2O7 (Ln = La-Lu) Научная публикация
Журнал |
Journal of Alloys and Compounds
ISSN: 0925-8388 , E-ISSN: 1873-4669 |
||||||||
---|---|---|---|---|---|---|---|---|---|
Вых. Данные | Год: 2016, Том: 689, Страницы: 669-679 Страниц : 11 DOI: 10.1016/j.jallcom.2016.08.019 | ||||||||
Ключевые слова | Lanthanide hafnates; Oxide materials; Precipitation; Pyrochlore; Fluorite; Phase transitions | ||||||||
Авторы |
|
||||||||
Организации |
|
Реферат:
Complex oxides of the Ln2Hf2O7 (Ln = lanthanide) series undergo a fluorite to pyrochlore phase transformation. We have studied the whole process of the crystal and local atomic structure realignment during the crystallization and the phase transition in the series of Ln2Hf2O7 (Ln = La-Lu) samples synthesized by the coprecipitation method with the subsequent annealing of mixed hydroxides (precursors). The study employed a combination of x-ray diffraction (normal and anomalous), x-ray absorption spectroscopy, analysis of atomic pair distribution function and Raman spectroscopy. The starting and ending temperatures of the fluorite-pyrochlore phase transition for Ln2Hf2O7 compounds have been determined along the lanthanide series La-Dy. The scheme summarizing structure types (amorphous, fluorite and pyrochlore) for the whole Ln2Hf2O7 (Ln = La-Lu) series as a function of the Ln cation radius (or the rLn3þ=rHf4þ ratio) and the annealing temperature has been refined.
Библиографическая ссылка:
Popov V.V.
, Menushenkov A.P.
, Yaroslavtsev A.A.
, Zubavichus Y.V.
, Gaynanov B.R.
, Yastrebtsev A.A.
, Leshchev D.S.
, Chernikov R.V.
Fluorite-Pyrochlore Phase Transition in Nanostructured Ln2Hf2O7 (Ln = La-Lu)
Journal of Alloys and Compounds. 2016. V.689. P.669-679. DOI: 10.1016/j.jallcom.2016.08.019 WOS Scopus РИНЦ
Fluorite-Pyrochlore Phase Transition in Nanostructured Ln2Hf2O7 (Ln = La-Lu)
Journal of Alloys and Compounds. 2016. V.689. P.669-679. DOI: 10.1016/j.jallcom.2016.08.019 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 23 мая 2016 г. |
Принята к публикации: | 3 авг. 2016 г. |
Опубликована online: | 4 авг. 2016 г. |
Опубликована в печати: | 25 дек. 2016 г. |
Идентификаторы БД:
Web of science | WOS:000384427200089 |
Scopus | 2-s2.0-84981342020 |
РИНЦ | 27135245 |
Chemical Abstracts | 2016:1355455 |
Chemical Abstracts (print) | 165:349581 |
OpenAlex | W2484892666 |