| 희석혼합체의 기계적 분쇄에 의한 나노 CeO2의 합성 |
| 임건자, 김태은, 이종호, 이해원, 이동주1, 현상훈2 |
한국과학기술연구원 나노재료연구센타
1(주) 나노플루이드
2연세대학교 세라믹공학과 |
| Diluted Synthesis of Manocrystalline CeO2 by Mechanical Milling |
| Geon-Ja Lim, Tae-Eun Kim, Jong-Ho Lee, Hae-Weon Lee, Dong-Joo Rhee1, Sang-Hoon Hyun2 |
Nano-Materials Research Center, Korea Institute of Science and Technology
1Nano fluid Technologies Co., Ltd.
2Department of Ceramic Engineering, Yonsei University |
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| ABSTRACT |
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The nanocrystalline $CeO_2$ was synthesized by mechanical milling and subsequent heat-treatment with the mixture of $Ce(OH)_4$ precursor and diluent, NaCl. Using deionized water, the diluent, NaCl, in the mixture has been easily dissolved out. Diffusion barrier was provided by the diluent during heat-treatment, which suppressed not only the coarsening of primary particle but also the agglormeration between the particles. Crystallite and aggregate size of $CeO_2$ depended on the concentration of diluent, temperature and time of heat-treatment; increased with the temperature and time increases. In case the mixture was heat-treated at high than $600^{circ}C$, however, the crystallite size was saturated near 20 nm, which was supposed to be due to the densification of diluent. ᤌ⨀ 㔴㜮㜻ऀ䍨敭楳瑲礀 |
| Key words:
Nanocrystalline, $CeO_2$, Mechanical milling, Diluent |
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