アルミニウム多核錯体よりのAIN粉末合成における炭素の影響

概要

論文の詳細を見る
Effect of carbon on the synthesis of AIN powder from aluminum polynuclear complexes was investigated. Aqueous solutions of basic aluminum chloride and glucose were used as starting materials. C/Al molar ratio was varied to investigate the effect on the reactivity of nitridation and particle size of synthesized AIN powder. The structure of the solution was investigated by <27>^Al and <13>^C-NMR spectroscopy. It was found that reactivity of nitridation took a maximum value at 1.8-2.0 of C/Al molar ratio and thereafter decreased gradually. This indicates that excess carbon inhibits the transportation of reaction gases at a gap among the particles. In this reaction system, C/Al molar ratio for the maximum reactivity nitridation is much smaller than that in the alumina-carbon black mixture system. Furthermore, this value is closer to the theoretical value for a complete nitridation reaction. These results suggest that carbon in our system is distributed more homogeneously than that in the alumina-carbon black mixture system. The particle size of the synthesized AlN powder decreases with increasing C/Al molar ratio. Obviously, carbon has a strong effect on the particle size of γ-alumina, which is formed as an intermediate in the nitridation process, and prevents the grain growth of the synthesized AlN particles. It was found that aluminum polynuclear complex and glucose formed a precursor in the solution.
社団法人日本セラミックス協会の論文
1991-09-01

アルミニウム多核錯体よりのAIN粉末合成における炭素の影響

スポンサーリンク

概要

著者

関連論文

スポンサーリンク