気相法によるマグネシア粉末の合成とその性質(<小特集>粉体小特集)

概要

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Magnesia powders having different particle sizes were prepared by a vapor phase oxidation process, and the effect of particle size on their properties was investigated. The particle size of magnesia powder increased with increaseing the flame kength of combusting magnesium vapor which was affected by the diffusion coefficient in the flame and the evaporation rate of magnesium. The magnesia powders obtained were highly pure, and especially the contents of U and Th were both below 1 ppb. The properties of magnesia powders were strongly affected by the particle size: The green density increased with increasing particle size, whereas the lattice constant decreased with increasing particles size. There was an optimum particle size to achive the maximum sintered density.
社団法人日本材料学会の論文
1987-11-15