Abstract
A single crystal of gibbsite was studied by in-situ monochromatic Laue method in order to characterize several phases through a dehydration process from gibbsite into corundum (a-Al2O3). Experiments were held at BL4B-1, KEK, using Imaging Plate and a heating stage at air condition. A single crystal of gibbsite crystal was put on the heating stage, heated onto 600 C, and exposed into X- rays monochromatized in 1.0A by Si (111) double crystal monochromator and collimated into 100 micrometer. Diffraction from X phase of alumina was observed around 200 C area, and extended, that means the size of crystallite of X- phase is very small as well as gamma-alumina.
