Abstract
Spherical thorium hydroxide prepared by spraying thorium hydroxide sol into isopropyl alcohol was filtered, washed, dried and calcined to form thorium oxide microsphere. Calcination time (519 hr) did not show definite tendency on the particle density, which reaches as high as 10 g/cm3. Mean particle diameter found to be inversely proportional to injection velocity of the hydroxide sol. As an index of fragility of the particles, water suspension of the particles was agitated violently in Waring Blender for 1 hr, and particle size distribution before and after the treatment was measured. Considerable disintegration was found for larger particles (>20μ).Thorium oxide microsphere which contain a small amount of Al or Si or U (mixed thorium oxide) can be made from the sol containing additive by the same spray method as for pure thorium oxide. Within the calcination temperature of 600°C to 1, 600°C, density of the mixed thorium oxide increases with temperature up to 1, 300°C, and reaches as high as 9.92. At 1, 600°C, however, the particles, particularly Al mixed ones, sintered. Tests with Waring Blender did not show significant effect. Again the smaller particles almost unchanged in size.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
