Abstract: The cross-sectional shape of the magnetic media has great influence on the magnetic field characteristic,and suitable matrix cross-sectional shape can improve the recovery of micro-fine magnetic materials and reduce processing energy consumption.The magnetic field characteristics of three kinds of matrix,circular cross-section,elliptical cross-section,rhombus cross-section,with different cross-sectional shape under different background magnetic field strength were analyzed with ANSYS.The results showed that: within the entire range of background magnetic field strength,the magnetic force generated by elliptical cross-sectional shape matrix is higher than that of circular and rhombus,and the magnetic force is 1.5~2 times as much as that of circular matrix under a certain background magnetic field strength; when the background magnetic field strength is lower than 0.8 T,magnetic force generated by diamond cross-sectional matrix is higher than that of circular cross-sectional shape matrices.The relationship is opposite when the background magnetic field strength is higher than 0.8 T,the main reason for which is the magnetic saturation of the matrix ends under a low background magnetic field owning to its sharpness shape.

Key words: Magnetic matrix, Cross-sectional shape, Magnetic field strength, Magnetic field gradient