Absorption property and stealthy effectiveness of carbon fiber cement based materials

Taking the power reflectivity measured by far field radar scattered cross-section method as the characterization indicator to appraise the absorption property, the absorption property of pure mortar and the influence of length and volume fraction of carbon fiber, mixing method, combined addition of carbon fiber and ferrite, temperature and humidity on the absorption property of carbon fiber mortar were investigated. The stealthy capability was calculated by a deduced evaluation equation of stealthy effectiveness. The results show that the absorption property of mortar in the high frequency range can be increased by adding carbon fiber, and a suitable length and volume fraction of carbon fiber are important factors for improving the absorption property of mortar. The absorption property of carbon fiber mortar made by the machine mixture is better than that by the artificial mixture, and it decreases with the increase of temperature and humidity or with the combined addition of carbon fiber and ferrite. The maximum radar detection range of carbon fiber mortar with an optimum mixture ratio is 80%-90% of pure mortar in the frequency range of 14-18 GHz.