Wang Guangming, Ma Zhijun, Zheng Yunsheng, Cheng Liang, Xing Huiling, Li Zhuomin
College of Mining, Liaoning Technical University Fuxin 123000 China
College of Materials Science & Engineering, Liaoning Technical University Fuxin 12300 China.
RSC Adv. 2024 Dec 3;14(52):38345-38352. doi: 10.1039/d4ra06136e.
In order to investigate the effect of different doping proportions of Yb on the structure and microwave absorption properties of ferrite, a sol-gel method was proposed to prepare spinel NiCoYb Fe O. The crystal shape, particle size, elements, microstructure, electromagnetic loss and microwave absorption properties of NiCoYb Fe O were characterized by X-ray diffraction, inductively coupled plasma emission spectrometry, transmission electron microscopy, scanning electron microscopy and vector network analysis. Results show that nickel-cobalt-ytterbium ferrite microwave absorbing materials can be prepared under optimal conditions, with an average particle size of 38.00-45.00 nm. With the increase in the doping amount, the microwave absorption performance first increases and then decreases. When Yb = 0.02, NiCoYbFeO has the best microwave absorption performance, the best reflection loss is -21.04 dB, and the effective microwave absorption bandwidth in the Ku band is 2.55 GHz (15.45-18.00 GHz). The prepared nickel-cobalt-ytterbium ferrite microwave absorbing material has the advantages of less thickness, light weight, strong reflection loss and simple synthesis method. The excellent absorbing properties of NiCoYbFeO are attributed to the interaction between natural resonance and exchange resonance.
为了研究不同Yb掺杂比例对铁氧体结构和微波吸收性能的影响，提出了一种溶胶-凝胶法制备尖晶石型NiCoYbFeO。通过X射线衍射、电感耦合等离子体发射光谱、透射电子显微镜、扫描电子显微镜和矢量网络分析对NiCoYbFeO的晶体形状、粒径、元素、微观结构、电磁损耗和微波吸收性能进行了表征。结果表明，在最佳条件下可制备出镍钴镱铁氧体微波吸收材料，平均粒径为38.00-45.00 nm。随着掺杂量的增加，微波吸收性能先增大后减小。当Yb=0.02时，NiCoYbFeO具有最佳的微波吸收性能，最佳反射损耗为-21.04 dB，Ku波段有效微波吸收带宽为2.55 GHz（15.45-18.00 GHz）。所制备的镍钴镱铁氧体微波吸收材料具有厚度小、重量轻、反射损耗大、合成方法简单等优点。NiCoYbFeO优异的吸收性能归因于自然共振和交换共振之间的相互作用。
