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Fabrication and characterization of Fe nano-particles by sonochemistry method.
- Source :
-
Materials Letters . Sep2014, Vol. 131, p266-268. 3p. - Publication Year :
- 2014
-
Abstract
- The structure and magnetic properties of Fe nano-particles prepared by the sonochemistry method were systematically studied. The power of sonicator played an important role in the microstructure and magnetic properties of the nano-particles. Initial X-ray powder diffraction patterns of Fe nano-particles prepared with a power of 180W and 450W exhibited amorphous-like diffraction peaks. TEM images showed that the average particle size of Fe nano-particles made with 180W is 2-3nm and increases to 5-6nm with 450W. The amorphous and superparamagnetic nature of the Fe nano-particles has been confirmed by TEM, SAD and magnetometry measurements. The saturation magnetization (Ms) of the 2-3nm Fe nano-particles is only 0.414T. Increasing the power to 450W, the Ms of Fe nano-particles with the size of 5-6nm can reach the value of 0.958T. To obtain fully crystalline particles, the Fe nano-particles were annealed at 923K for 2min. After annealing, the Ms increased to 1.807T. TEM results show that the amorphous-like Fe nano-particles have been transformed to crystalline bcc α-Fe. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0167577X
- Volume :
- 131
- Database :
- Academic Search Index
- Journal :
- Materials Letters
- Publication Type :
- Academic Journal
- Accession number :
- 97002689
- Full Text :
- https://doi.org/10.1016/j.matlet.2014.05.210