Preparation and extinction properties of carbon/zinc doped ferromagnetic composites

In order to achieve the high-efficiency and environmental protection requirements of anti-infrared smoke screens, as well as light weight and wide-band wave absorption performance, the precursors of carbon-based MnZn/NiZn/CoZn ferrite composite materials were prepared by a one-step hydrothermal method, and the carbon based/Zn doped ferromagnetic composites were obtained by calcination at the temperature range of 500-900 ℃. The phase and morphology of the compression were characterized by X-ray diffraction(XRD), Fourier transform infrared spectroscopy (FT-IR) and Scanning Electron Microscopy(SEM), and the effect of calcination temperature on material properties was investigated. According to Lambert Beer’s law, the mass extinction coefficients were calculated by KBr pellets method of infrared spectroscopy in the range of 2.5-25 μm, and the effect of calcination temperature on material properties were investigated. The results show that the infrared extinction properties of carbon based/zinc doped ferromagnet composites are enhanced after calcination of carbon based/zinc doped ferrite precursor. The infrared extinction coefficient of carbon/cobalt zinc ferromagnet calcined at 700 ℃ is the largest, which is 0.25 m²/g, and has good infrared extinction properties.