Low-Temperature Oxidation of Fine UO2 Powders: A Process of Nanosized Domain Development

Gregory Leinders; Janne Pakarinen; Rémi Delville; Thomas Cardinaels; Marc Verwerft

doi:10.1021/acs.inorgchem.6b00127

Low-Temperature Oxidation of Fine UO2 Powders: A Process of Nanosized Domain Development

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Abstract

The nanostructure and phase evolution in low-temperature oxidized (40−250 °C), fine UO2 powders ( 1) were observed. Oxidation involves formation of higher uranium oxides in nanodomains near the grain surface which, initially, have a disordered defect structure (“disordered U4O9”). As oxidation progresses, domain growth increases and the longperiod modulated structure of U4O9 develops (“ordered U4O9”). A similar mechanism is understood to happen also in U3O7−z.

Original language	English
Pages (from-to)	3915-3927
Journal	Inorganic Chemistry
Volume	55
DOIs	https://doi.org/10.1021/acs.inorgchem.6b00127
State	Published - 25 Mar 2016

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10.1021/acs.inorgchem.6b00127

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title = "Low-Temperature Oxidation of Fine UO2 Powders: A Process of Nanosized Domain Development",

abstract = "The nanostructure and phase evolution in low-temperature oxidized (40−250 °C), fine UO2 powders ( 1) were observed. Oxidation involves formation of higher uranium oxides in nanodomains near the grain surface which, initially, have a disordered defect structure (“disordered U4O9”). As oxidation progresses, domain growth increases and the longperiod modulated structure of U4O9 develops (“ordered U4O9”). A similar mechanism is understood to happen also in U3O7−z.",

keywords = "uranium dioxide, oxidation, X-ray diffraction, transmission electron microscopy, thermal analysis",

author = "Gregory Leinders and Janne Pakarinen and R{\'e}mi Delville and Thomas Cardinaels and Marc Verwerft",

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T1 - Low-Temperature Oxidation of Fine UO2 Powders: A Process of Nanosized Domain Development

AU - Leinders, Gregory

AU - Pakarinen, Janne

AU - Delville, Rémi

AU - Cardinaels, Thomas

AU - Verwerft, Marc

N1 - score=10

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N2 - The nanostructure and phase evolution in low-temperature oxidized (40−250 °C), fine UO2 powders ( 1) were observed. Oxidation involves formation of higher uranium oxides in nanodomains near the grain surface which, initially, have a disordered defect structure (“disordered U4O9”). As oxidation progresses, domain growth increases and the longperiod modulated structure of U4O9 develops (“ordered U4O9”). A similar mechanism is understood to happen also in U3O7−z.

AB - The nanostructure and phase evolution in low-temperature oxidized (40−250 °C), fine UO2 powders ( 1) were observed. Oxidation involves formation of higher uranium oxides in nanodomains near the grain surface which, initially, have a disordered defect structure (“disordered U4O9”). As oxidation progresses, domain growth increases and the longperiod modulated structure of U4O9 develops (“ordered U4O9”). A similar mechanism is understood to happen also in U3O7−z.

KW - uranium dioxide

KW - oxidation

KW - X-ray diffraction

KW - transmission electron microscopy

KW - thermal analysis

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/19641550

U2 - 10.1021/acs.inorgchem.6b00127

DO - 10.1021/acs.inorgchem.6b00127

M3 - Article

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SP - 3915

EP - 3927

JO - Inorganic Chemistry

JF - Inorganic Chemistry

ER -