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부양가스응축법에 의해 제조된 철산화물 나노 분말의 자기적 특성연구 KCI 등재

A Study on Magnetic Iron Oxide Nano Particles Synthesized by the Levitational Gas Condensation (LGC) Method

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한국분말야금학회지 (Journal of Korean Powder Metallurgy Institute)
한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

Nanoparticles of iron oxides have been prepared by the levitational gas condensation (LGC) method, and their structural and magnetic properties were studied by XRD, TEM and Mossbauer spectroscopy. Fe clusters were evaporated from a surface of the levitated liquid Fe droplet and then condensed into nanoparticles of iron oxide with particle size of 14 to 30 nm in a chamber filled with mixtures of Ar and gases. It was found that the phase transition from both - and -Fe to , which was evaluated from the results of Mossbauer spectra, strongly depended on the flow rate. As a result, - was synthesized under the flow rate of 0.1(Vmin)0.15, whereas was synthesized under the , flow rate of 0.15(Vmin)0.2.

저자
  • 엄영랑
  • 김흥회
  • 이창규