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8 h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Mg^(2+)、Co^(2+)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。
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 Mg^(2+)and Co^(2+)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.
作者
马志军
杭文武
翁兴媛
高静
郑云生
陶洪霖
Ma Zhijun;Hang Wenwu;Weng Xingyuan;Gao Jing;Zheng Yunsheng;Tao Honglin(Liaoning Technical University,Fuxin 123000,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2024年第10期2934-2940,共7页
Rare Metal Materials and Engineering
基金
国家自然科学基金(52274265)。
关键词
水热法
镁钴铁氧体
尖晶石型
X波段
吸波性能
hydrothermal method
magnesia-cobalt ferrite
spinel type
X-band
wave absorption property
