Preparation method of neodymium-lanthanum-doped barium ferrite-polyrrole composite microwave absorbent

The invention provides a preparation method of a neodymium-lanthanum-doped barium ferrite-polyrrole composite microwave absorbent. According to the preparation method, nano particles of neodymium-lanthanum-doped barium ferrite, Ba(LaNd)xFe12-2xO19, are prepared by virtue of a combustion method with a salt assisting solution in combustion, and on the basis of the prepared nano particles, neodymium-lanthanum-doped barium ferrite-polyrrole composite particles are prepared in virtue of an in-situ composite technology. The composite particles have a polymeric magnet-cladding core/shell structure, gather the advantages of single conducting polymer and inorganic magnetic compounds, and have a wide application prospect in the fields of military equipment stealth technologies, civil human safety protection, anti-jamming communication, electronic information secrecy and the like.