PREPARATION OF GALLIUM NITRIDE FLUORESCENT SUBSTANCE, PREPARATION OF GALLIUM OXIDE AND GALLIUM OXIDE

摘要

PROBLEM TO BE SOLVED: To provide a preparation process of a GaN fluorescent substance having a good crystallinity. ;SOLUTION: Gallium hydroxide is obtained by adding ammonia dropwise to gallium nitrate hydride. This gallium hydroxide is introduced into an oven pre-heated to 800°C to remove moisture at once. Spongy, porous gallium oxide having a specific surface area which is twice as large as that of conventional gallium oxide, is obtained. This porous gallium oxide is allowed to react in an ammonium atmosphere at 1,000°C for two hours to obtain a powdery GaN. Conventional GaN prepared using conventional gallium oxide as a material had a black pigmentation containing tan-colored parts. GaN obtained here is tan-colored with no blackened part. GaN obtained here has a sphere-like form wherein the particle size is distributed within from 0.5 to 2 μm, and was proved to have an improved crystallinity than that of the conventional GaN through an X-ray diffraction analysis.;COPYRIGHT: (C)2000,JPO