Electromagnetic wave-absorbing material

1. A method for making an electromagnetic wave-absorbing composite, the method including the steps of:

mixing barium nitride, iron nitride and glycine with one another and with deionized water and stirring so that the barium nitride, iron nitride and glycine are dissolved in the de-ionized water;

introducing ammonium hydroxide into the barium nitride-iron nitride-glycine solution to adjust the pH of the solution;

subjecting the barium nitride-iron nitride-glycine solution to a bath so as to form brown collosol;

baking the brown collosol so that it is turned into gel;

heating and calcining the gel to obtain barium ferrite (BaFe 12 O 19 ) powder;

dissolving tetrabutyl titanate in isopropyl alcohol and stirring;

dissolving barium acetate in the tetrabutyl titanate-isopropyl alcohol solution;

introducing glacial acetic acid into the barium acetate-tetrabutyl titanate-isopropyl alcohol solution to adjust the pH of the solution;

subjecting the solution to a sol-gel reaction;

drying and calcining obtained gel to obtain barium titanate (BaTiO 3 ) powder;

mixing the barium ferrite with the barium titanate and dissolving the mixture in water;

separately mixing dodecylbenzenesulfonic acid (DBSA) and deionized water and stirring;

then adding aniline to the DBSA and deionized water and emulsifying, thus providing an emulsifying agent;

adding the barium ferrite +barium titanate solution to the pre-mixed DBSA-aniline emulsifying agent and stirring by ultrasonic waves;

adding ammonium persulfate (APS) into de-ionized water and stirring;

adding the APS solution to the barium ferrite + barium titanate and emulsifying agent so that polymerization occurs;

after the polymerization, adding acetone for dividing the mixture made in the forgoing step into an upper tier and a lower tier;

filtering and drying deposits in the lower tier, thus providing a (Ba Ferrite+BaTiO 3 )/polyaniline composite.

2. A method for making an infrared-shielding and microwave electromagnetic wave-absorbing composite including the steps of:

mixing liquid resin with the Ba Ferrite+BaTiO 3 /polyaniline composite made in the method as set forth in claim 1 ;

stirring the mixture;

filling the mixture in a mold;

curing and cooling the mixture, thus forming a final product; and

removing the final product from the mold.

3. The method in accordance with claim 2 , wherein the liquid resin is selected from the group consisting of polyurethane resin, poly-methylmethacrylate, silicone resin and polyester resin.

4. The method of claim 1 , wherein the mixing barium ferrite with barium titanate and dissolving the mixture in water further comprises stirring the solution by ultrasonic waves.

5. The method of claim 1 , wherein the barium nitride, iron nitride and glycine are mixed with one another at a mole ratio of 1:11.5:25.