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| Home > Publications database > Short- and long-range order balance in nanocrystalline $Gd_{2}Zr_{2}O_{7}$ powders with a fluorite-pyrochlore structure |
| Home > Publications database > Short- and long-range order balance in nanocrystalline $Gd_{2}Zr_{2}O_{7}$ powders with a fluorite-pyrochlore structure |
| Journal Article | PUBDB-2015-00801 |
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2014
MAIK Nauka/Interperiodica Publ.
Moscow
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Please use a persistent id in citations: doi:10.1134/S0036023614040147
Abstract: A series of nanocrystalline $Gd_{2}Zr_{2}O_{7}$ 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 $Gd^{3+} and Zr^{4+}$ 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.
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