Short- and long-range order balance in nanocrystalline Gd2Zr2O7 powders with a fluorite-pyrochlore structure View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2014-04-17

AUTHORS

V. V. Popov, Ya. V. Zubavichus, A. P. Menushenkov, A. A. Yaroslavtsev, E. S. Kulik, V. F. Petrunin, S. A. Korovin, N. N. Trofimova

ABSTRACT

A series of nanocrystalline Gd2Zr2O7 powders has been studied using a combination of X-ray diffraction and X-ray spectroscopy with synchrotron radiation. It has been shown that isothermal annealing of an X-ray amorphous mixed hydroxide first leads to the formation of an oxide nanomaterial with a defect fluorite structure and clearly pronounced nonequivalence of the local environment of the Gd3+ and Zr4+ ions. Increasing heat treatment temperature results in initiation and growth of nanodomains with pyrochlore-type superstructure ordering of cations inside bulkier crystallites of defect fluorite. To adequately describe the evolution of the real nanocrystalline structure of gadolinium zirconate, a combination of X-ray structural methods sensitive to the averaged crystal structure and local atomic structure should be used. More... »

PAGES

279-285

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s0036023614040147

DOI

http://dx.doi.org/10.1134/s0036023614040147

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1030188366


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