中文摘要：

采用磷化处理后的还原铁粉，通过压制、热处理获得铁基软磁复合材料（ISMCs），探讨了成形压力和热处理工艺对材料磁导率、磁损耗和频率特性影响。研究结果显示，900MPa压力获得密度为7．2g／cm^3磁粉芯，振幅磁导率μa≥100（30～250kHz），且肛μa频率稳定性好（变化量≤0．02～0．03／kHz）。经400℃热处理后，肚。超过120（30～250kHz），提高了20％。热处理温度超过450℃，磁粉芯的磁损耗显著增加、肚。急剧下降。损耗分离研究显示，磁损耗增加主要体现在涡流损耗急剧上升。再经TG—DTA分析，磷化铁粉在462℃时出现一个明显的吸热峰，主要是磷酸氢盐发生分解反应，导致绝缘层破坏，进而影响材料的磁性能。

英文摘要：

The iron-based soft magnetic composites（ISMCs） were prepared by pressing using phosphatizated reduced iron powder. Effects of the pressure and heat-treatment on the amplitude permeability, magnetic loss and frequency characteristics of ISMCs were discussed in this paper. Results shows that the density of ISMCs compressed under 900 MPa reaches 7.2 g/cm^3 ,and the amplitudeμa is higher than 100 （30-250 kHz） while frequency stability exhibits excellent （the p. change≤0.02-0.03/kHz）. When ISMCs are heat-treated at 400℃ for 30 minutes,μa increases 20% and exceeds 120. But when the heat-treated temperature is above 450℃, the magnetic loss increases obviously andμa, decreases acutely. The separation of magnetic loss indicates that the increase of magnetic loss is attributed to the eddy current loss. The TG-DTA curves of the phosphatization powder shows an obvious endothermic peak at 462℃ ,and it means phosphates on the surface of powder decompose,which results the insulating film breakdown and magnetic properties deterioration.