Abstract In this research, electromagnetic and microwave absorption properties of the hexagonal ferrites with chemical composition, Sr0.85La0.15(CoZr)xFe12-2xO19 (x = 0.00, 0.25, 0.50, 0.75 and 1.00) were studied in the K-band (18–26.5 GHz) and Ka-band (26.5–40 GHz) frequency range. Minimum reflection loss (RL) was successfully optimized in the studied frequency range by tuning sample thickness using quarter-wavelength criterion. Absorption results of synthesized hexagonal ferrites show minimum RL in the range of −18.15 dB to −28.69 dB and absorption bandwidth (−10 dB) in the range of 1.04 GHz to 5.87 GHz. The microwave absorption significantly improved with absorption bandwidth (−10 dB) of 5.87 GHz for the composition x = 1.00 at a sample thickness of 2.2 mm. These newly synthesized ferrites have high potential as microwave absorbing material for military applications such as camouflaging of the target and also as EMI (Electromagnetic Interference) suppressor.

中文翻译：

---

Co-Zr 取代的 La-Sr 六铁氧体在 18 – 40 GHz 频率范围内的复介电常数、复导磁率和反射损耗

摘要 本研究对化学成分为 Sr0.85La0.15(CoZr)xFe12-2xO19 (x = 0.00, 0.25, 0.50, 0.75 and 1.00) 的六方铁氧体在 K 波段 ( 18–26.5 GHz) 和 Ka 波段 (26.5–40 GHz) 频率范围。通过使用四分之一波长标准调整样品厚度，在研究的频率范围内成功优化了最小反射损耗 (RL)。合成六边形铁氧体的吸收结果显示 -18.15 dB 至 -28.69 dB 范围内的最小 RL 和 1.04 GHz 至 5.87 GHz 范围内的吸收带宽 (-10 dB)。微波吸收显着改善，吸收带宽 (-10 dB) 为 5.87 GHz，对于样品厚度为 2.2 mm 的组合物 x = 1.00。