Determination of conditions for the oxidation of UN and UC under microwave radiation

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Abstract

The oxidation of UN and UC in a field of microwave radiation in air at atmospheric pressure has been studied. The influence of crucible material on the extent of oxidation of UN and UC was studied. It has been established that, under the influence of an MW field with a power of 800 W and a frequency of 2.45 GHz, under certain conditions, heating of UN and UC to ~993 K is observed with their oxidation in air to U3O8. For fast (15–20 min) and safe (without fires and explosions) oxidation of UN and UC, crucibles made of quartz and carbon ceramics are most suitable.

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About the authors

S. A. Kulyukhin

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences

Author for correspondence.
Email: kulyukhin@ipc.rssi.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071

Yu. M. Nevolin

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences

Email: kulyukhin@ipc.rssi.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071

A. A. Bessonov

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences

Email: kulyukhin@ipc.rssi.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071

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2. Fig. 1. Photograph of a quartz crucible containing UN under the influence of a MW field

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3. Fig. 2. Powder X-ray diffraction patterns of samples obtained by oxidation of UN placed in porcelain (1), quartz (2) and carbon ceramic (3) crucibles. MWR irradiation conditions: air, 20 min, 800 W, 2.45 GHz. * U3O8 [23].

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4. Fig. 3. Photograph of a porcelain crucible containing UC exposed to a MW field

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5. Fig. 4. Powder X-ray diffraction patterns of samples obtained by oxidation of UС placed in crucibles made of alundum (1), porcelain (2), quartz (3) and carbon ceramics (4). MWR irradiation conditions: air, 20 min, 800 W, 2.45 GHz. * U3O8 [23].

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