离子比例对镁钴铁氧体吸波性能的影响
Effect of Ion Ratio on Wave Absorption Properties of Magnesia-Cobalt Ferrite
马志军 1杭文武 1翁兴媛 1高静 1郑云生 1陶洪霖1
作者信息
- 1. 辽宁工程技术大学,辽宁阜新 123000
- 折叠
摘要
采用水热法制备尖晶石型MgxCo1-xFe2O4,通过X射线衍射仪(XRD)、透射电镜(TEM)和矢量网络分析仪(VNA)表征手段,研究了掺杂Mg、Co比例对铁氧体晶体结构、微观形貌及吸波性能的影响,总结了镁钴铁氧体的电磁波吸收机制.结果表明:在pH=10、晶化温度为180 ℃、晶化时间为8h条件下,成功制备出形貌为不规则四边形的镁钴铁氧体材料.当Mg2+、Co2+配比为5∶5,吸波层厚度为3.5 mm时,在频率9.50 GHz处反射损耗值达到-40.78 dB,有效吸收带宽为3.65 GHz(8.06～11.71 GHz),覆盖X波段.优异的吸波性能归因于自然共振、交换共振和涡流损耗的共同作用.
Abstract
Spinel MgxCo1-xFe2O4 was prepared by hydrothermal method.The effects of the proportion of Mg and Co doping on the crystal structure,microstructure and wave absorption properties of magnesia-cobalt ferrite were studied by X-ray diffraction(XRD),transmission electron microscopy(TEM)and vector network analyzer(VNA).The electromagnetic wave absorption mechanism of magnesia-cobalt ferrite was summarized.The results show that when pH=10,crystallization temperature is 180 ℃ and crystallization time is 8 h,magnesia-cobalt ferrite with irregular quadrilateral morphology is prepared.When the ratio of Mg2+and Co2+is 5∶5 and the thickness of the absorbing layer is 3.5 mm,the reflection loss value at the frequency of 9.50 GHz reaches-40.78 dB,and the effective absorption frequency bandwidth is 3.65 GHz(8.06-11.71 GHz),covering the X-band.The excellent absorbing properties are attributed to the combined action of natural resonance,exchange resonance and eddy current loss.
关键词
水热法/镁钴铁氧体/尖晶石型/X波段/吸波性能Key words
hydrothermal method/magnesia-cobalt ferrite/spinel type/X-band/wave absorption property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据