Nano-crystalline ferrites with the chemical formula Ni_xZn_(1−x)Fe₂O₄, where x = 0, 0.2, 0.4, 0.6, 0.8, 1.0, were synthesized using a co-precipitation method. The obtained ferrites were investigated by X-ray diffraction (XRD). The corrosion inhibiting behavior of nano-sized ferrites was tested using carbon steel samples and 10% aqueous ferrite extracts. Results were compared with previous data obtained for micro-sized ceramic ferrites. Nanoparticles show more favorable properties regarding inhibiting corrosion processes on steel. Two Millimeter thick epoxy coatings on steel containing 10% vol. of nano-sized ferrites has been investigated as a microwave absorber. The microwave reflectivity of the coating was measured within the range from 6.5 to 15 GHz. Both the nano- and micro-sized ferrites included in the coatings exhibited different reflection loss spectra. The greatest attenuation on a level of 8–16 dB was observed. The nano-ferrite-filled epoxy coating exhibited a higher minimum reflection frequency in comparison with the micro-ferrite-filled coating. A frequency shift of 1-2 GHz was observed.

化学式为Ni _x Zn _（1-x） Fe ₂ O _4的纳米晶铁氧体，其中X使用共沉淀法合成= 0、0.2、0.4、0.6、0.8、1.0。通过X射线衍射（XRD）研究获得的铁氧体。使用碳钢样品和10％水性铁素体提取物测试了纳米尺寸铁素体的缓蚀性能。将结果与以前获得的微型陶瓷铁氧体数据进行了比较。纳米颗粒在抑制钢上的腐蚀过程方面显示出更有利的性能。钢上两毫米厚的环氧涂料，含10％（体积）。已经研究了纳米级铁氧体作为微波吸收剂。在6.5至15GHz的范围内测量涂层的微波反射率。涂层中包括的纳米铁氧体和微米铁氧体均表现出不同的反射损耗光谱。观察到最大衰减为8–16 dB。与微铁氧体填充的涂层相比，纳米铁氧体填充的环氧涂层表现出更高的最小反射频率。观察到1-2 GHz的频移。