Yttrium-Stabilized Zirconia Particles Prepared Using Electro-dialysis of (Zr,Y)OCl2 Aqueous Solution

다국어 초록 (Multilingual Abstract)

Hydrous zirconia particles were prepared from ZrOCl2aqueous solution using an electro-dialysis [ED] process. For the preparationof (Zr,Y)(OH)4 precipitates, 3 mol% YCl3 was added into ZrOCl2aqueous solution. During the hydrolysis of 0.5 mol/L(Zr,Y)OCl2 solution at 90oC a slurry solution was obtained. The ED process was used for the removal of chlorine from the slurrysolution. Two kinds of slurry solution were sampled at the beginning and end of the ED process. The morphology of hydrous zirconiaparticles in the solution was observed using an inverted optical microscope and an FE-SEM. The hydrous zirconia particleswere nano-crystalline, and easily coagulated with drying. Yttrium stabilized zirconia [YSZ] powder could be obtained by the calcinationof (Zr,Y)(OH)4 precipitates prepared from a (Zr,Y)OCl2 solution by the ED process. The coagulated dry powders wereshaped and sintered at 1500oC for 2 h. The sintered body showed a dense microstructure with uniform grain morphology.

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