Abstract Due to the high cut-off frequency induced by strong magneto-crystalline anisotropy, M-type strontium ferrite has been commercially used in GHz frequency. However, M-type strontium ferrite is unable to meet the performance requirements (strong absorption ability, thin absorbing thickness and broad effective bandwidth) of advanced absorbing materials. In order to overcome the above defects, mesoporous Ag3PO4 nanorods/SrFe12O19 hexagonal nanoflake heterostructure has been designed and prepared in this work. Being evaluated as microwave absorbents, this heterostructure exhibits the superior EM absorbing performances, such as the optimal reflection loss value of −63. 18 GHz at 5.1 mm, effective absorption bandwidth of 6.24 GHz at 2.3 mm and the EM absorption efficiency of 46.45 dB GHz/mm at 2.0 mm. The theoretical simulations are applied to explain the EM loss sources through the adjustment of frequency. This work provides a strategy to design effective microwave absorbers based on the dielectric-magnetic heterostructure from two aspects of theoretical simulation and experimental testing.

中文翻译：

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具有优异微波吸收性能的介孔Ag3PO4纳米棒/SrFe12O19六方纳米薄片异质结构的设计与制备

摘要 由于强磁晶各向异性引起的高截止频率，M型锶铁氧体已在GHz频率上得到商业应用。然而，M型锶铁氧体无法满足先进吸波材料的性能要求（吸波能力强、吸波厚度薄、有效带宽宽）。为了克服上述缺陷，本工作设计并制备了介孔Ag3PO4纳米棒/SrFe12O19六方纳米薄片异质结构。作为微波吸收剂，这种异质结构表现出优异的电磁吸收性能，例如最佳反射损耗值为-63。5.1 mm 处为 18 GHz，2.3 mm 处的有效吸收带宽为 6.24 GHz，2.0 mm 处的 EM 吸收效率为 46.45 dB GHz/mm。理论模拟用于通过频率调整来解释电磁损耗源。这项工作从理论模拟和实验测试两个方面提供了一种基于介磁异质结构设计有效微波吸收器的策略。