Method for surface oxidation treatment of uranium oxide powder
A technology of surface oxidation treatment and uranium dioxide, which is applied in the direction of uranium dioxide, uranium oxide/hydroxide, and greenhouse gas reduction, can solve the problems that UO2 has not been reported, and achieve low production cost, promote diffusion, and improve Effects of formation and growth rate
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Embodiment 1
[0020] Take the original O / U atomic ratio as 2.0 and the specific surface area as 2.70m 2 / gUO 2 Powder 20g, filled with Al 2 o 3 In the crucible, the surface powder is scraped off, the oxidizing medium is air, and the atmosphere is an open furnace door. will be fitted with UO 2 Powdered Al 2 o 3 Put the crucible into the tube furnace, open the furnace door and heat to 250°C, the heating rate is about 10°C / min, after 2 hours of heat preservation, the power is automatically cut off, cooled to about 90°C, and the crucible is taken out and air-cooled to obtain the surface of the present invention. Oxidized uranium dioxide powder.
[0021] After testing, the processed UO 2 Powder O / U atomic ratio is 2.10, specific surface area is 2.90m 2 / g.
Embodiment 2
[0023] Take the original O / U atomic ratio as 2.0 and the specific surface area as 2.70m 2 / gUO 2 Powder 20g, filled with Al 2 o 3 In the crucible, the surface powder is scraped off, the oxidizing medium is air, and the atmosphere is an open furnace door. will be fitted with UO 2 Powdered Al 2 o 3 Put the crucible into a tube furnace, open the furnace door and heat to 300°C, the heating rate is about 15°C / min, the power is automatically cut off after 4 hours of heat preservation, cooled to about 60°C, and the crucible is taken out and air-cooled to obtain the surface of the present invention. Oxidized uranium dioxide powder.
[0024] After testing, the processed UO 2 The powder O / U atomic ratio is 2.35 and the specific surface area is 4.10m 2 / g.
Embodiment 3
[0026] Take the original O / U atomic ratio as 2.0 and the specific surface area as 2.70m 2 / gUO 2 Powder 20g, filled with Al 2 o 3 In the crucible, the surface powder is scraped off, the oxidation medium is air, and the atmosphere is closed furnace air. will be fitted with UO 2 Powdered Al 2 o 3 Put the crucible into the tube furnace, close the furnace door and heat to 300°C with a heating rate of about 20°C / min. After 4 hours of heat preservation, the power will be automatically cut off, cooled to about 80°C, and the crucible will be taken out and air-cooled to obtain the surface of the present invention. Oxidized uranium dioxide powder.
[0027] After testing, the processed UO 2 The powder O / U atomic ratio is 2.29 and the specific surface area is 3.80m 2 / g.
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