貫通気孔を有するジルコニアバルーンの合成

概要

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Zirconia balloon with pores through the crust was synthesized by dispersing polystyrene added Zr (OC_4H^n_9)_4 benzene solution to formamide. Zirconia balloon precursor was formed in F/B/F (formamide/benzene/formamide) emulsion. As benzene was extracted to formamide from the F/B/F droplets, polystyrene and Zr (OC_4H^n_9)_4 phase separation occurred, and the F/B/F droplets solidified. In the balloon precursor crust polystyrene spheres dispersed in a Zr(OC_4H^n_9)_4 matrix. The crust thickness was about 2μm. The diameter of the polystyrene spheres was almost the same as the crust thickness. The spheres were removed with extraction by benzene. Spherical pores which were left in the crust opened only to the inner surface of the crust. The spherical pores were opened to the outer surface of the crust by etching the precursor balloons with hydrochloric acid. On heat-treatment at 1300℃ the precursor balloons after hydrochloric acid treatment were transformed to zirconia balloons with pores through the crust. The size distribution of heat-treated balloons was in the range between 1μm and 35μm with a mean value of about 10μm in diameter.
社団法人日本セラミックス協会の論文
2006-03-01