Zr-フトキシドの加水分解挙動に及ぼす溶媒の影響

概要

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In an attempt to better control the particulate properties of alkoxy-derived ceramic powders, the hydrolysis process of alkoxide was studied with special emphasis on the effect of solvent and properties of precipitate were examined. Zirconium normal butoxide was dissolved in solvents with different properties and hydrolyzed. Substitution of alkoxyl groups, hydrolysis and polymerization liberating water molecules were studied by gas chromatogaphy and water content determination with a Carl Fischer aquameter. Extensive substitution took place in ethanol resulting in the accelerated hydrolysis. In t-butanol, however, the substitution was limited. The induction time for precipitation determined with a UV spectrometer was the shortest for n-heptane, almost the same for ethanol and t-butanol, and the longest for n-butanol. Summarizing the data for time change in water content in the reaction solution, polymerization of partially hydrolyzed alkoxide seems to play an important role for enhancing the precipitation. Properties of the precipitates have been correlated with the observed results in hydrolysis.
社団法人日本セラミックス協会の論文
1989-05-01