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利用溶胶-凝聚法制备了Nio.5Zno.5Fe_2O_4;粉末材料,烧结温度范围600℃~950℃。对材料的结构、红外、磁学和微波吸收特性进行了研究。材料的XRD图谱和原子力显微镜形貌观察表明,材料在纳米尺度范围之内。在500 cm-~600cm-1波数范围内,材料具有明显的红外吸收特性。材料的晶粒尺寸随着烧结温度的提高而增加,且较高温度烧结的材料具有相对低的矫顽力和饱和磁场。利用反射衰减实验研究材料在6 GHz~10 GHz波段范围的吸波特性,结果表明,0.33 mm厚度的样品在常温下的反射衰减达到1.8 dBm。
The Nio.5Zno.5Fe_2O_4 powder material was prepared by sol-coacervation. The sintering temperature ranged from 600 ℃ to 950 ℃. The structure, infrared, magnetic and microwave absorption properties of the material were studied. XRD patterns and atomic force microscopy of the material showed that the material was in the nanoscale range. In the 500 cm- ~ 600cm-1 wave number range, the material has obvious infrared absorption characteristics. The grain size of the material increases with increasing sintering temperature, and the material sintered at higher temperatures has a relatively lower coercivity and saturation magnetic field. The reflection characteristics of the material in the range of 6 GHz to 10 GHz were studied by reflection attenuation experiment. The results show that the reflection attenuation of the sample with the thickness of 0.33 mm reaches 1.8 dBm at room temperature.