【摘要】 报道了新开发的纳米晶Fe_67.9Cu_0.5Nb_0.6Cr₃V₁Si₁₄B₁₃合金的综合磁性能。新合金的直流起始磁导率和矫顽力水平分别为7.8×10⁴和0.8Am^-1。在B_m=0.3T,f=100kHz和B_m=0.2T,f=200kHz条件下,铁损分别为544kW. m^-3和830kW. m^-3,这可与纳米晶Fe₍73.Cu₁Nb₃Si_13.5B₉的相比,但比优良的功率Mn-Zn铁氧体H_7c4的低得多。在直到1MHZ的频率范围内考查了弱场磁导率的频散特性。在f=20-10³KHz和B_m=0.01-1.0T范围内,考查了高频矫顽力和B_m的关系。在f=20-10³KHz和B_m=0.05-0.9T范围内,描述了铁损和f及B_m的关系。更多还原

【Abstract】 The synthetical magnetic properties of newly-developed nanocrystalline Fe_67.9Cu_0.5Nb_0.6Cr₃V₁Si₁₄B₁₃ alloy have been reported. The new alloy possesses higher d. c. relative initial permeability of 7.8×10⁴ and Lower coercivity of 0.8Am^-1. Under the conditions of B_m=0.3T, f=100kHz and B_m=0.2T,f=200kHz, the core losses of the new alloy are 544kW.m^4-3 and 830 kW.m^-3, respectively, which can be comparable to those of the nanocrystalline Fe_73.5Cu₁Nb₃Si_13.5B₉ alloy and are much lower than those of the typical superior power Mn-Zn ferrite H_7o4. The dispersive character of permeability at weak field has been examined in the frequency range up to 1 MHz. The dependence of high-frequency coereivity on B_m has been examined in the ranges of f=20-10³ kHz and B_m=0.01-1.0T. The behavior of change in core loss with f and B_m has been described in the ranges of f=20-10³kHz and B_m=0.05-0.9T.更多还原