金属アルコキシドからのジルコニアバルーンの合成

概要

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Zirconia balloons were synthesized from zirconium tert-n-butoxide in F/B/F (formamide/benzene/formamide) emulsion. Zirconium tert-n-butoxide in benzene ranging from 0.5 to 2.0 mol・l^<-1> was dispersed in formamide. The formed droplets of zirconium tert-n-butoxide in benzene could be solidified in formamide because solvent benzene was extracted by formamide; these solidified droplets were hydrolyzed with water in order to obtain zirconia precursor balloons. Zirconia precursor balloons were successfully obtained from a 1.2 mol・l^<-1> solution of zirconium tert-n-butoxide in benzene. Diameter of zirconia precursor balloons was 150 to 450 μm. Zirconia precursor balloons could be heat-treated at 1300℃ to form zirconia balloons without damage of the balloon structure. The diameter of zirconia balloons was in the range between 100 and 400 μm. Weight loss and shrinkage observed during heat-treatment were 34.5 mass% and 45 vol%, respectively. Zirconia balloons consisted of grains 0.2 μm in diameter. Pores 50 nm in diameter existed on their surface and wall cross section.
社団法人日本セラミックス協会の論文
2002-08-01