Fe 3 C nanopowder synthesized by laser pyrolysis and its annealing behaviour
- 29 March 2006
- journal article
- research article
- Published by Wiley in Surface and Interface Analysis
- Vol. 38 (4) , 482-485
Abstract
We describe the Fe 3 C‐based nanopowder obtained through the laser‐induced pyrolysis of the gas mixture of Fe(CO) 5 and C 2 H 4 . This ferromagnetic nanopowder was characterized by XRD, HRTEM and magnetic measurements. Aggregated core‐shell nanoparticles were identified in the nanopowder; Fe 3 C cores were coated with pyrolytic carbon. The mean coherence domain size estimated by the Scherrer formula was 18 nm. Basic magnetic characteristics were measured at 20 °C: H C = 42.0 kA m −1 ; σ R = 31.2 A m 2 kg −1 ; σ S = 95.7 A m 2 kg −1 (at 1200 kA m −1 ). The Curie temperature T C was 227 °C. Thermally induced phase transformations are discussed. Copyright © 2006 John Wiley & Sons, Ltd.Keywords
This publication has 10 references indexed in Scilit:
- Iron/graphite core‐shell structured nanoparticles prepared by annealing of Fe‐C‐N compositephysica status solidi (c), 2004
- Preparation of iron/graphite core–shell structured nanoparticlesJournal of Alloys and Compounds, 2004
- Recent Developments in the Synthesis of Iron-Based Nanostructures by Laser Pyrolysis: Integrating Structural Analysis with the Experimental MethodSolid State Phenomena, 2004
- Iron ultrafine nanoparticles prepared by aerosol laser pyrolysisMaterials Letters, 2003
- Laser pyrolysis fabrication of ferromagnetic γ′-Fe4N and FeC nanoparticlesJournal of Applied Physics, 2000
- Curie temperature enhancement in Fe/sub 3/C nanoparticles made by laser pyrolysisIEEE Transactions on Magnetics, 1997
- Oxidation characteristics and magnetic properties of iron carbide and iron ultrafine particlesJournal of Applied Physics, 1996
- Preparation and characterization of single phase γ-Fe nanopowder from cw CO2 laser induced pyrolysis of iron pentacarbonylMaterials Letters, 1994
- Nanocrystalline α–Fe, Fe3C, and Fe7C3 produced by CO2 laser pyrolysisJournal of Materials Research, 1993
- Sinterable Powders from Laser-Driven Reactions1981