Correlation Between the Magnetic Properties of Ce-Containing Magnets and the CeFe₂ Phase at Various Sintering...

This article investigates the relationship between the magnetic properties of magnets and the percentage and distribution of the CeFe₂ phase at different sintering temperatures. At the lower sintering temperature, the grain boundary phase flow of the magnet is poor, more hole defects are generated in the magnet, and the comprehensive magnetic properties of the magnet are poor. An increase in sintering temperature increases the ratio of CeFe₂ phase, improves the fluidity of grain boundary liquid phase, fills the hole defects and causes an increase in remanence. However, an increase in grain size also inhibits the coercivity of the magnet at this temperature. When the sintering temperature reaches 1080 °C, the CeFe₂ phase ratio continues to increase, providing more liquid phase. The phase Ce₂Fe₁₇ was also decomposed into liquid phase, the continuity and wettability of grain boundary phase were optimized, and the coercivity reached a maximum of 13.18 kOe. However, the orientation of the magnet changed and the proportion of the main phase decreased, resulting in a slight decrease in the remanence (B_r = 13.17 kGs).