Thermal properties of nonstoichiometry uranium dioxide

In this paper, was developed a method of oxidation pure uranium dioxide to a predetermined deviation from the stoichiometry. Oxidation was carried out using the thermogravimetric method on NETZSCH STA 409 CD with a solid electrolyte galvanic cell for controlling the oxygen potential of the environme...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2016-04, Vol.130 (1), p.12025-12029
Main Authors: Kavazauri, R, Pokrovskiy, S A, Baranov, V G, Tenishev, A V
Format: Article
Language:English
Subjects:
Deviation
Diffusivity
Electrolytic cells
Heat capacity
Heat conductivity
Heat transfer
Oxidation
Solid electrolytes
Specific heat
Stoichiometry
Thermal conductivity
Thermal diffusivity
Thermodynamic properties
Uranium
Uranium dioxide
Uranium oxides
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Summary:In this paper, was developed a method of oxidation pure uranium dioxide to a predetermined deviation from the stoichiometry. Oxidation was carried out using the thermogravimetric method on NETZSCH STA 409 CD with a solid electrolyte galvanic cell for controlling the oxygen potential of the environment. 4 samples uranium oxide were obtained with a different ratio of oxygen-to-metal: O U = 2.002, O U = 2.005, O U = 2.015, O U = 2.033. For the obtained samples were determined basic thermal characteristics of the heat capacity, thermal diffusivity, thermal conductivity. The error of heat capacity determination is equal to 5%. Thermal diffusivity and thermal conductivity of the samples decreased with increasing deviation from stoichiometry. For the sample with O M = 2.033, difference of both values with those of stoichiometric uranium dioxide is close to 50%.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/130/1/012025