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Journal Articles Solid State Sciences Year : 2018

Mechanical synthesis of nanostructured Y2Ti2O7 pyrochlore oxides

Abstract

Pyrochlore-type Y2Ti2O7 powders were successfully synthesized by mechanical milling. Nanosized powders of Y2O3 and TiO2 are milled to form an amorphous mixture of Y2Ti2O7 containing a small quantity of crystallized fluorite structure and initial constituents. The desired fully crystallized pyrochlore phase is obtained from this mixture through heat treating at 900 degrees C. In situ X-ray Diffraction by Synchrotron radiation investigations reveal that this transformation takes pace through a first step of crystallization into a fluorite-like structure at 800 degrees C. The formation of the pyrochlore structure occurs around 900 degrees C. The obtained product is a nanostructured pyrochlore powder of which can be integrated in the manufacturing process of oxide dispersion strengthened steels.
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Dates and versions

hal-01935361 , version 1 (04-12-2018)

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E. Simondon, P-F Giroux, L. Chaffron, A. Fitch, P. Castany, et al.. Mechanical synthesis of nanostructured Y2Ti2O7 pyrochlore oxides. Solid State Sciences, 2018, 85, pp.54-59. ⟨10.1016/j.solidstatesciences.2018.09.006⟩. ⟨hal-01935361⟩
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