Effect of doping rare earth oxides on microwave absorbing properties of Polyaniline/Al-alloy foams composite materials

Abstract

Porous metal as the new style structural - functional material is going to be exploited and utilized further. The absorbing properties of aluminium foams coated absorbing paint were studied and tested by making use of RCS in "the reflectivity testing measurement of radar absorbing material" of GJB 2038-94 in this work. The morphology and distribution of microwave absorbent were analyzed by scanning electron microscopy (SEM).The influence of electromagnetic wave rare earth oxides on absorbing properties of materials was discussed. The results indicated that in the 12∼18GHz and 26.5∼40GHz bands the absorbing properties increase with the increase of frequency, and after doping the rare earth oxide, the absorbability of the composite material was enhanced. Therefore, doping the rare-earth oxide is a way to improve absorbing properties of absorption materials, and the absorbability of Al-alloy foams can be improved by coating with composite powder of Polyaniline in reasonable proportion to the rare-earth oxide in is available to be improved.