Nanocrystalline soft magnetic composites (n-SMCs) with excellent soft magnetic properties are widely used in medium and high frequency electronic devices. However, the production of n-SMCs with high frequency stability and low core losses (P_c) remains a challenge. In this work, we balanced electromagnetic performances and frequency properties of Finemet n-SMCs by tuning the mass ratio of flake and spherical powders. The morphology, phase structures, electromagnetic performances or frequency characteristics of powders and n-SMCs were systematically investigated. Scanning electron microscope was employed to prove that the addition of spherical powders (SPs) can improve the matching degree of powders and density of n-SMCs. As the mass ratio of SPs increased, the P_c and the hysteresis losses (P_h) of magnetic powder cores first decreased and then increased, while the eddy current losses (P_e) showed the monotonic downward trend. What’s more, owing to the excellent insulation coating performances of SPs, quality factor (Q), DC-bias characteristics and frequency stability were significantly improved after mixing SPs with FPs. The n-SMCs with the mass ratio of 2:3 between SPs and FPs exhibited the best comprehensive performances with the effective permeability of μ_e = 43 (f = 100 kHz), the quality factor of Q = 78, the core losses of P_c = 294 mW/cm³ (B_m = 50 mT, f = 100 kHz), and the DC-bias characteristics of 56%. This work endows Finemet n-SMCs with a potential application for inductance components at high frequency.

具有优异软磁性能的纳米晶软磁复合材料（n-SMCs）广泛应用于中高频电子器件中。然而，生产具有高频率稳定性和低磁芯损耗 (Pc) 的 n-SMC_仍然是一个挑战。在这项工作中，我们通过调整薄片和球形粉末的质量比来平衡 Finemet n-SMC 的电磁性能和频率特性。系统地研究了粉末和n-SMCs的形貌、相结构、电磁性能或频率特性。采用扫描电镜证明添加球形粉末(SPs)可以提高粉末的匹配度和n-SMCs的密度。随着 SP 质量比的增加，P _c磁粉芯磁滞损耗（P _h）先减小后增大，涡流损耗（P _e）呈单调下降趋势。更重要的是，由于SPs优异的绝缘涂层性能，SPs与FPs混合后，品质因数（Q）、直流偏置特性和频率稳定性得到显着改善。SPs和FPs质量比为2:3的n-SMCs综合性能最好，有效磁导率为μ _e = 43 ( f = 100 kHz)，品质因数Q = 78，磁芯损耗为P _c = 294 mW/cm ³ (乙_m = 50 mT， f = 100 kHz），直流偏置特性为 56%。这项工作赋予 Finemet n-SMCs 用于高频电感元件的潜在应用。