Abstract
In order to improve the magnetic properties of Sm2Fe17N3 particles, several milling factors that influence the magnetic properties were systematically examined, including whether the mill is of the vibration or ball type, the milling time and the number of balls. It was found that the iHc decreases with aggregates and agglomerates of particles. Strain and oxidation led to a decrease in 4πIs and 4πIr. Addition of surfactant in the milling process inhibited aggregates and strain. The magnetic properties of Sm2Fe17N3 particles are as follows: 4πIr = 14.1 kG, iHc=9.2 kOe and (BH)max = 34 MGOe. A typical epoxy-bonded magnet has a (BH)max of 20 MGOe.
