| 학회 |
한국재료학회 |
| 학술대회 |
2011년 봄 (05/26 ~ 05/27, 제주 휘닉스 아일랜드) |
| 권호 |
17권 1호 |
| 발표분야 |
B. Nanomaterials and Processing Technology((나노소재기술) |
| 제목 |
Synthesis and Dispersion stability of core/shell structured matal/carbon nano particles |
| 초록 |
The carbon encapsulated Ni and Fe nanoparticles have attracted much attention, because of the technological potential applications such as magnetic storage media, lubricant, and ferrofluids, etc. The nano particles were synthesized by a levitational gas condensation (LGC) method. The starting material was the metal Ni and Fe wire with diameter of 0.4 mm. The mixed Ar and CH4 gas pressure in chamber was 86 torr. The morphologies of the carbon-coated Fe nanocrystallites were characterized by transmission electron microscopy. The results indicated that all of the as-made materials were composed of only nanocapsules with the uniform particle size at and below 10 nm. The nanocapsules consisted of outer multi-shells of carbon. The magnetic performance of the Ni@C and Fe@C sample was demonstrated in a liquid phase (ethanol, and poly ethylene glycol) by placing a magnet bar near the glass bottle. The dispersion stability kinetics of the solvents increased in the following order: water, ethanol, and ethylene glycol. The polarity of the solvent affected the dispersion stability kinetics. |
| 저자 |
Young Rang Uhm, Su-Hyeong Jun, Chang Kyu Rhee
|
| 소속 |
Korea Atomic Energy Reaserch Institute(KAERI) |
| 키워드 |
dispersion stability; core/shell structure
|
| E-Mail |
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