Lanthanide effect on the formation and evolution of nanocrystalline structures in Ln2Hf2O7 compounds (Ln = Sm-Dy) View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2015-01-07

AUTHORS

V. V. Popov, Ya. V. Zubavichus, A. P. Menushenkov, A. A. Yaroslavtsev, E. S. Kulik, A. A. Pisarev, N. A. Kolyshkin

ABSTRACT

X-ray diffraction with synchrotron radiation has been used for comparative analysis of crystal structure evolution in Ln2Hf2O7 (Ln = Sm-Dy) complex oxides with a fluorite-pyrochlore structure, synthesized by isothermal annealing of mixed hydroxides. It has been shown that heat treatment of the precursor in the temperature range 600–700°C initiates the formation of nanocrystallites with a fluorite structure. Long-range cationic ordering of the pyrochlore type appears in Ln2Hf2O7 (Ln = Sm-Tb) samples once a definite crystal size has been achieved at temperatures ≥1200°C. In Dy2Hf2O7 samples, a defect fluorite structure persists in the entire range of heat-treatment temperatures. More... »

PAGES

16-22

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s003602361501009x

DOI

http://dx.doi.org/10.1134/s003602361501009x

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1016792904


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179 schema:name National Research Center Kurchatov Institute, pl. Akademika Kurchatova 1, 123182, Moscow, Russia
180 rdf:type schema:Organization
 




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