水溶液中でのジルコニア固溶体超微結晶の合成とゾルゲル薄膜への応用

概要

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Highly dispersed tetragonal or cubic zirconia solid solution hydrosols composed of ultrafine particles were prepared by aging coprecipitated hydroxides both of Zr-Y and Zr-Ca below 200℃ for a long duration. In Zr0_2-Y_20_3 system, 10-30 mol% Y_20_3 solid solutions crystallized easily at 97℃ for 5 days. The solid solution particles with cubic shape of 60-120 Å formed, when 10 mol% Y_20_3 was added. The solid solutions in the ZrO_2-CaO system were also obtained at 150℃ for 3 days. When the coprecipitated hydroxides containing 0-20 mol% CaO was washed by saturated Ca (OH)_2 solution before aging, the produced solid solution contained 15.3-18.8 mol% CaO and they were composed of spherical particles of 30-60Å. Translucent thin films of cubic zirconia, both of Zr0_2-Y_20_3 and Zr0_2-CaO solid solutions, were obtained and they were composed of grains of 1-4 pm after firing at 1350℃ for 30 min.
社団法人日本セラミックス協会の論文
1988-01-01