Abstract: Influence of synthesis conditions (type of atmosphere, reduction and oxidation, annealing temperature) on the chemical composition and structure of the compounds formed in the "ZrO2 - Ce2O3 / CeO2" system has been investigated by X-ray absorption fine structure (XAFS) spectroscopy combined with X-ray diffraction (XRD) and thermogravimetric analysis (TGA). It is revealed that isothermal annealing of precursor at temperatures less than 1000 °C in air leads to formation of Ce0.5Zr0.5O2 powders with cubic fluorite-type structure (Fm-3m). Further increase of annealing temperatures above 1000 °C causes decomposition of formed crystal structure into two phases: cubic and tetragonal. Annealing in reduction hydrogen atmosphere causes formation of Ce4 + 2xCe3 + 2-2xZr2O7 + x compounds with intermediate valency of cerium, where value of x depends on the reducing conditions and treatment parameters of precursor. Annealing in vacuum at 1400 °C strongly reduces the content of Ce4+ in a powder samples and leads to formation of pyrochlore structure (space group Fd-3m) with practically Ce3+ valence state.

Cite: Popov V.V. , Menushenkov A.P. , Khubbutdinov R.M. , Svetogorov R.D. , Zubavichus Y.V. , Sharapov A.S. , Kurilkin V.V.
Influence of Synthesis Conditions on the Crystal Structure of the Powder Formed in the ZrO2- Ce2O3/CeO2 System
Journal of Physics: Conference Series. 2016. V.747. 012041 :1-5. DOI: 10.1088/1742-6596/747/1/012041 WOS Scopus РИНЦ ANCAN OpenAlex

Files: Full text from publisher

Dates:

Submitted:	Sep 1, 2016
Published print:	Sep 1, 2016
Published online:	Sep 21, 2016

Identifiers:

Web of science:	WOS:000387066400041
Scopus:	2-s2.0-84992038046
Elibrary:	27583028
Chemical Abstracts:	2016:1946004
Chemical Abstracts (print):	172:365357
OpenAlex:	W2521523406

Citing:

DB	Citing
Web of science	3
Scopus	3
OpenAlex	1

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