Arc Plasma Synthesis of Nanostructured Fe Powder
Abstract
To investigate the effect of the parameters of the arc plasma process on the characteristics of the iron nano powder, the hydrogen volume fraction in the powder synthesis atmosphere was changed from 10% to 50%. The particle size, phase structure and magnetism of the synthesized iron powder were studied using the FE-TEM, XRD and a vibration magnetometer at room temperature. The particle size increased simultaneously with the increase in the hydrogen volume fraction, and the particle size ranged from about 20nm to 100nm with the change of the hydrogen volume fraction increasing from 10% to 50%. The synthesized iron powder particle had a shell-core structure composed of the crystalline alpha-Fe in the core and the crystalline Fe3O4 in the shell. The iron nano powder synthesized under the high hydrogen volume fraction condition had a higher saturation magnetism and lower coercive force than the values of the one synthesized under the low hydrogen volume fraction condition.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2003
- Accession Number
- ADP014252
Entities
People
- Gil-geun Lee
- Sung-duck Kim
Organizations
- Pukyong National University