Annealing Behaviour of Fe-C-N Nanopowder: Formation of Iron/Graphite Core-Shell Structured Nanoparticles

Abstract:

Article Preview

We are reporting the core-shell structured iron/graphite nanoparticles formed by annealing of a nanopowder. The original Fe-C-N based nanopowder has been synthesized by the laser pyrolysis of gas phase reactants. TEM, XRD, Raman spectroscopy, Mössbauer spectroscopy and magnetic measurements were used for its characterization. Nanopowder was heated up to 800°C at ~ 1 Pa vacuum. Presence of iron nanoparticles with the mean diameter of 40 nm in the annealed state of the nanopowder was confirmed from the width of α-Fe X-ray diffraction lines and their core-shell structure was observed under TEM.

Info:

Periodical:

Edited by:

Jaroslav Pokluda

Pages:

187-190

Citation:

B. David et al., "Annealing Behaviour of Fe-C-N Nanopowder: Formation of Iron/Graphite Core-Shell Structured Nanoparticles", Materials Science Forum, Vol. 482, pp. 187-190, 2005

Online since:

April 2005

Export:

Price:

$38.00

[1] J.S. Haggerty, W.R. Cannon: chapter 3 in J.S. Haggery, J.I. Steinfeld (Eds. ), Laser-Induced Chemical Processes, Plenum Press, New York (1981) p.165.

[2] R. Alexandrescu, S. Cojocaru, A. Crunteanu, I. Morjan, I. Voicu, L. Diamandescu, F. Vasiliu, F. Huisken, B. Kohn: J. Phys. IV France 9 (1999) p. Pr-8-537.

DOI: https://doi.org/10.1051/jp4:1999867

[3] X. Zhao, Y. Liang, Z. Hu: NanoStructured Materials 7(3) (1996) p.313.

[4] S. Seraphin, D. Zhou, J. Jiao: J. Appl. Phys. 80(4) (1996) p. (2097).

[5] Y. -T. Jang, J. -H. Ahn, Y. -H. Lee, B. -K. Ju: Chem. Phys. Lett. 372 (2003) p.745.

[6] ICSD Database ver. 1. 2. 0., FIZ Karlsruhe, Germany, (2003).

[7] B. David, N. Pizúrová, O. Schneeweiss, P. Bezdička, I. Morjan, R. Alexandrescu: Preparation of iron/graphite core-shell structured nanoparticles, article in press, J. Alloy. Compd.

DOI: https://doi.org/10.1016/j.jallcom.2003.10.088

[8] F. Tuinstra, J.L. Koenig: J. Chem. Phys. 53 (1970) 1126. 1000 2000 3000 4000 Raman shift [cm-1] Intensity [a. u. ] . . D G Figure 6: Micro-Raman spectrum for the annealed sample.