Preparation and Properties of Magnesium Oxysulfide Cement Based Foam Board Absorbing Material

In order to better solve the problem of electromagnetic pollution in the civil building cement, to improve the absorption capacity of magnesium oxysulfide cement based materials, and to better use sulfur oxide magnesium cement foamed sheet for improvement of electromagnetic industry, this paper uses the excellent microwave absorbing properties of ferrite and the modified sulfur oxide magnesium cement foam board, and discusses the microwave absorbing performance, aiming at improving the electromagnetic pollution in daily life. The effects of ferrite and silicon carbide doping on microwave absorption properties of modified magnesium oxysulfate cement were studied. At the same time, the wave absorbing properties of the corresponding samples were detected by bow method, and the causes of the corresponding phenomena were analyzed by scanning electron microscopy (SEM). The results show that the lowest reflectance of the material is −17.9 dB at 34.1 GHz and the average reflectance of the whole band is −15.9 dB under the target frequency band of 26.5–40 GHz. Under the action of external magnetic field, the absorbing particles are affected by magnetization force, magnetic dipole and resistance coupling, and play the absorbing effect in the cement base solidified completely in the electromagnetic field environment. The lowest reflectance is −17.3dB at 36.4GHz and the average reflectance is −14.3dB for the whole band.