In this study, nanocomposites with microwave absorption capability were synthesized based on cobalt-based MOF/SrFe₁₀CoTiO₁₉/carbon nanofibers. The microstructural, morphological, and magnetic characteristics were examined via X-ray diffraction, field emission scanning electron microscopy, and vibrating sample magnetometer, respectively. The microwave absorption properties of single-layer microwave absorbers were examined in the ku-band frequency range of 12.5–18 GHz. For the single-layer absorbers, the absorption characteristic of nanocomposite of all components is more efficient than that of sample containing just only cobalt-based MOF or doped strontium hexaferrite nanoparticles. The composite containing 70 wt.% cobalt-based MOF, 29 wt.% doped strontium hexaferrite, and 1 wt.% carbon nanofibers nanocomposite reached − 19 dB with 3.9 GHz bandwidth in the range of ku-band with the thicknesses of only 2.5 mm. The addition of carbon nanofibers (CNFs) has increased the interfacial polarization, while dipole polarization enhanced due to interactions between CNFs and Co/C. Capacitor-like structures will be formed due to the dielectric difference between components and so on generates great space-charge polarization. Enhanced in these parameters may be linked to increase in the magnetic and dielectric losses and increase the microwave absorption characteristic. Cobalt-based MOF/SrFe₁₀CoTiO₁₉/carbon nanofiber nanocomposite can be used as a potential candidate for microwave absorbers with strong absorption capability.

中文翻译：

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基于钴基MOF / SrFe 10 CoTiO 19 /碳纳米纤维纳米复合材料的高效微波吸收剂设计

在这项研究中，基于钴基MOF / SrFe ₁₀ CoTiO ₁₉合成了具有微波吸收能力的纳米复合材料。/碳纳米纤维。分别通过X射线衍射，场发射扫描电子显微镜和振动样品磁力计检查了其微观结构，形态和磁学特性。在12.5–18 GHz的ku频段范围内检查了单层微波吸收器的微波吸收特性。对于单层吸收剂，所有成分的纳米复合材料的吸收特性比仅仅包含钴基MOF或掺杂的六锶锶铁氧体纳米颗粒的样品的吸收特性更有效。包含70 wt。％钴基MOF，29 wt。％掺杂的锶锶铁氧体和1 wt。％碳纳米纤维纳米复合材料的复合材料在ku波段范围内具有3.9 GHz带宽，厚度仅为2.5 mm，达到-19 dB 。碳纳米纤维（CNF）的添加增加了界面极化，而偶极极化由于CNF和Co / C之间的相互作用而增强。由于元件之间的介电差异，将形成电容器状结构，从而产生很大的空间电荷极化。这些参数的提高可能与磁损耗和介电损耗的增加以及微波吸收特性的增加有关。钴基MOF / SrFe 这些参数的提高可能与磁损耗和介电损耗的增加以及微波吸收特性的增加有关。钴基MOF / SrFe 这些参数的提高可能与磁损耗和介电损耗的增加以及微波吸收特性的增加有关。钴基MOF / SrFe₁₀ CoTiO ₁₉ /碳纳米纤维纳米复合材料可用作具有强大吸收能力的微波吸收剂的潜在候选材料。