| 열가수분해 및 수열결정화에 의한 구형 ZrO2 분말의 합성 |
| 조철희, 김명희, 최재영, 김도경 |
| 한국과학기술원 재료공학과 |
| Synthesis of Spherical ZrO2 Powders by Thermal Hydrolysis and Hydrothermal Crystallization |
| Churl-Hee Cho, Ming-Ji Jin, Jae-Young Choi, Do-Kyung Kim |
| Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology |
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| ABSTRACT |
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$ZrO_2$, $Y_2O_3$-doped $ZrO_2$ and CaO-doped $ZrO_2$ powders were prepared by hydrothermal crystallizing spherical $ZrO_2$ gel which had been synthesized by thermal hydrolysis reaction. After the hydrothermal crystallization process, the formed crystallized powders sustained its original spherical shape and had the mean particle size of $0.4{mu}m$. The particles were composed of about 10nm sized primary particles. The agglomeration strength between the primary particles appears very weak considering that the spherical particles were broken into the primary particles during the pressing process. The particle shape, size, phase fraction and dopant content were analyzed and crystallization mechanism of spherical gel was discussed. |
| Key words:
ZrO$_2$, Hydrothermal crystallization, Thermal hydrolysis, Doping |
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