화학기상응축법으로 제조한 Fe-Co 나노입자의 구조 및 자기적 상태에 관한 뫼스바우어 분석
Mo¨ssbauer Analysis for the Microstructure and Magnetic States of Fe-Co Nanoparticle Synthesized by Chemical Vapor Condensation
오세진(주성대); 최철진(한국기계연구원); 권순주(포항공과대학교); 진상호(포항공과대학교); 김병기(한국기계연구원)
41권 7호, 432~438쪽
초록
Nine nano-sized Fe-Co particle samples synthesized by Chemical Vapor Condensation(CVC) were analyzed using Mo¨ssbauer spectroscopy, XRD, BET and HRTEM. The synthesized nanoparticles consisted of metallic core and oxide shell structures, and their surfaces were covered with a-FeOOH, γ-FeOOH and Fe_(3)O_(4). The increase of cobalt content enhanced magnetic field. However, when the decomposition temperature and the oxygen content in the carrier gas (Ar) increased, the magnetic field of nanoparticles reduced with decreasing the average particle size. with increasing the vacuum pressure, the average particle size and the magnetic field increased.
Abstract
Nine nano-sized Fe-Co particle samples synthesized by Chemical Vapor Condensation(CVC) were analyzed using Mo¨ssbauer spectroscopy, XRD, BET and HRTEM. The synthesized nanoparticles consisted of metallic core and oxide shell structures, and their surfaces were covered with a-FeOOH, γ-FeOOH and Fe_(3)O_(4). The increase of cobalt content enhanced magnetic field. However, when the decomposition temperature and the oxygen content in the carrier gas (Ar) increased, the magnetic field of nanoparticles reduced with decreasing the average particle size. with increasing the vacuum pressure, the average particle size and the magnetic field increased.
- 발행기관:
- 대한금속·재료학회
- 분류:
- 재료공학