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http://dx.doi.org/10.4150/KPMI.2004.11.1.016

Effect of Carrier Gas on the Microstructure and Magnetic Properties of Co Nanoparticles Synthesized by Chemical Vapor Condensation  

X. L. Dong (한국기계연구원 재료연구부)
Publication Information
Journal of Powder Materials / v.11, no.1, 2004 , pp. 16-21 More about this Journal
Abstract
The nano-sized Co particles were successfully synthesized by chemical vapor condensation (CVC) process using the precursor of cobalt carbonyl ($Co_2(CO)_8$). The influence of carrier gases on the microstructure and magnetic properties of nanoparticles was investigated by means of XRD, TEM, XPS and VSM. The Co nano-particles with different phases and shapes were synthesized with a change of carrier gas : long string morphologies with coexistence of fcc and hcp structure in Ar carrier gas condition; finer Co core in a mass of cobalt oxide with only fcc structure in He; rod type cobalt oxide phase in Ar＋6vol％$O_2$. The saturation magnetization and coercivity was lower in Co nanoparticles synthesized in He carrier gas, due to their finer size.
Keywords
Co nanoparticle; Chemical vapor condensation; Carrier gas; Powder characteristics; Magnetic property;
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Times Cited By KSCI : 1  (Citation Analysis)
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