Abstract
Microgravity was applied for 4.5 seconds using dropping facility to freezing of various kinds of mixed aqueous solutions such as ZrOCl2⋅8H2O-MCl3⋅6H2O(M=Yor Al). The precipitates were freeze dried and then fired to 1000°C. Both good crystallinity and well mixing of the metal salts were observed when the microgravity was applied just before the freezing of the aqueous solution.
