Abstract SrFe12O19/Ni0.6Zn0.4Fe2O4 composites were synthesized by one-pot solution combustion method. The effects of NiZn ferrite content on phase, structure, microstructure and magnetic properties of composites were investigated by X-ray diffractometry, infrared spectroscopy, electron microscopy and vibrating sample magnetometry techniques. Strontium hexaferrite and NiZn ferrite phases were well crystallized following calcination at 900 °C without any impurities being formed. The composites were composed of platelet-like SrFe12O19 particles being mixed with quasi-spherical NiZn ferrite particles. The composites containing 10 wt% Ni0.6Zn0.4Fe2O4 exhibited a single magnetization curve with maximum saturation magnetization of 56 emu/g, as a confirmation of exchange coupling, while other composites had “bee waist” type hysteresis loop. The coercivity of composites decreased from 5143 to 1778 Oe with addition of NiZn ferrite phase. The microwave absorption measurements in X-band (8–12 GHz) showed a maximum absorption of −23.5 dB at 9.9 GHz for SrFe12O19-10 wt% Ni0.6Zn0.4Fe2O4 composite in comparison with the other composites.

中文翻译：

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一锅溶液燃烧法制备的SrFe 12 O 19 /Ni 0.6 Zn 0.4 Fe 2 O 4 复合材料的结构、磁性和微波吸收性能

摘要 采用一锅溶液燃烧法合成了SrFe12O19/Ni0.6Zn0.4Fe2O4复合材料。采用X射线衍射、红外光谱、电子显微镜和振动样品磁强计技术研究了NiZn铁氧体含量对复合材料物相、结构、显微组织和磁性能的影响。锶六铁氧体和镍锌铁氧体相在 900 °C 煅烧后结晶良好，没有形成任何杂质。复合材料由片状 SrFe12O19 颗粒与准球形 NiZn 铁氧体颗粒混合组成。含有 10 wt% Ni0.6Zn0.4Fe2O4 的复合材料表现出单一磁化曲线，最大饱和磁化强度为 56 emu/g，作为交换耦合的确认，而其他复合材料具有“蜂腰”型磁滞回线。随着NiZn铁氧体相的加入，复合材料的矫顽力从5143 Oe降低到1778 Oe。X 波段 (8-12 GHz) 的微波吸收测量表明，与其他复合材料相比，SrFe12O19-10 wt% Ni0.6Zn0.4Fe2O4 复合材料在 9.9 GHz 处的最大吸收为 -23.5 dB。