摘要
为了获得反射损耗小且吸收电磁波带宽较宽的吸波材料,采用金属离子Ni^(2+)、Mn^(2+)、Co^(2+)、Ti^(4+)部分取代BaFe_(10)O_(19)中的Fe^(3+)离子,通过溶胶凝胶法制备BaMn_(0.1)Ni_(0.1)Co_(0.8)TiFe_(10)O_(19)铁氧体粉末,将其与石蜡混合制备成掺杂M型钡铁氧体材料。测量结果表明,材料厚度为2 mm时,小于-15 dB的吸收带宽的频率区域可达7.2 GHz,当频率在9.7 GHz时反射损耗最小为-45 dB。该M型钡铁氧体具有良好的吸波性能,在高频领域具有很大的应用潜力。
For a broader absorption bandwidth with smaller reflection loss (RL)in electromagneticabsorber,the metal ions(Ni^2+,Mn^2+, Co^2+)and titanium ion (Ti^4+)were employed to partially replace the iron ions (Fe^3+)in BaFe10O19,and the doped barium hexaferrite (BaMn0.1Ni0.1Co0.8TiFe10O19)powders were synthesized via the sol-gel combustion method.Subsequently,the microwave absorbing composites were prepared by mixing the ferrite powders with the paraffin.It was found that the composite possessed a minimum reflection loss of -45 dB at 9.7 GHz with a matching thickness of 2.0mm and the absorption bandwidth less than -15 dB could reach 7.2GHz.Thus,BaMn0.1 Ni0.1 Co0.8 TiFe10O19 could be the good microwave absorber,which has great potentials to be applied in the high frequency fields of the microwave absorbing materials.
出处
《安全与电磁兼容》
2018年第6期57-59,72,共4页
Safety & EMC
基金
四川省教育厅科研项目(18ZB0661)
宜宾职业技术学院科研项目(ybzysc16-14)
