Electromagnetic and microwave absorption properties of BaMgxCo1−xTiFe10O19
| Autor: | Pingyuan Meng, Jing Chen, Guanchen Zhou, Guangliang Xu, Xinqing Wang, Meiling Wang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Diffraction Materials science Mechanical Engineering Reflection loss Metals and Alloys Analytical chemistry 02 engineering and technology Dielectric Coercivity 021001 nanoscience & nanotechnology 01 natural sciences Grain size chemistry.chemical_compound Nuclear magnetic resonance chemistry Mechanics of Materials 0103 physical sciences Materials Chemistry Ferrite (magnet) 0210 nano-technology Microwave Barium ferrite |
| Zdroj: | Journal of Alloys and Compounds. 679:335-340 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.04.001 |
| Popis: | To improve the impedance matching and then achieve a better microwave absorption performance in electromagnetic absorber, the Mg2+ was added to occupy the sites of Co2+ in hexagonal-type ferrite BaCoTiFe10O19. BaMgxCo1−xTiFe10O19 were synthesized by a simple sol-gel combustion technique and the phase of BaMgxCo1−xTiFe10O19 was confirmed by X-ray diffraction analysis (XRD). The grain size of BaMgxCo1−xTiFe10O19 was in the range of 100–400 nm and crystal particles were refined with the augment of doped Mg2+. Based on the static magnetic measurement, the coercivity (Hc) increased and the saturation magnetization (Ms) decreased as the x increased. Moreover, it was found that BaMg0.4Co0.6TiFe10O19 possessed a maximum reflection loss of −33.7 dB with a matching thickness of 2.0 mm measured by the vector net-analyzer in the frequency of 0.5–18 GHz, which also had a bandwidth below −20 dB ranging from 11.5 GHz to 17.2 GHz. Meanwhile, the permeability of the prepared ferrites could be adjusted and a proper match was provided between dielectric and magnetic properties by controlling the doped content of Mg2+, which would be significant to the application of BaMgxCo1−xTiFe10O19 in the field of the microwave absorbing materials. |
| Databáze: | OpenAIRE |
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