Abstract Planar anisotropy carbonyl iron (PACI) particles were prepared from commercial spherical carbonyl iron particles through a high performance ball-milling technique. The paraffin composites with orientation of shape anisotropy field for these PACI particles were obtained by applying an external magnetic field during the fabrication process. The frequency-dependent complex permeability values of these prepared paraffin composites have been investigated in the frequency range of 1–18 GHz. The results demonstrate that the orientation of shape anisotropy field for these PACI particles can effectively increase the complex permeability and decrease the complex permittivity values. Benefit from the enhancement in the complex permeability and reduction in the complex permittivity, the better impedance matching condition can be obtained and thus the good microwave absorption performance can be achieved for the samples with enough magnetic field orientation time.

中文翻译：

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具有形状各向异性场取向的平面羰基铁粒子的高微波衰减性能

摘要 以市售球形羰基铁颗粒为原料，采用高性能球磨技术制备了平面各向异性羰基铁（PACI）颗粒。通过在制造过程中施加外部磁场获得这些 PACI 颗粒具有形状各向异性场取向的石蜡复合材料。这些制备的石蜡复合材料的频率相关复磁导率值已在 1-18 GHz 的频率范围内进行了研究。结果表明，这些PACI粒子形状各向异性场的取向可以有效地增加复数磁导率并降低复数介电常数值。受益于复数磁导率的增强和复数介电常数的降低，