| 摘要 |
PROBLEM TO BE SOLVED: To improve the control of sintering density by preliminarily mixing UO2 powder and Gd2 O3 powder while utilizing the fluidity and mixing the flocculated particle with a hammer mill grinding machine. SOLUTION: UO2 powder and Gd2 O3 powder generally form flocculated particles and the particles are approximately 10-1000μm and approximately 1-30μm respectively, and are non-uniform. Gd2 O3 powder is approximately 1-10wt.% in the mixed powder. When mixing particles, for example, by the V-type mixing system and ball mill mixing, a flocculated particle cannot be properly ground and the particle diameter and the mixed state cannot be finely controlled, thus resulting in a mixed powder with poor uniformity. When using the hammer mill grinding machine in combination, the particle diameter of powder and the mixing state can be finely controlled by adjusting a hammer speed, the amount of power supply, and a screen size, thus controlling a sintering density to a desired value.
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