Porous glass ceramic capable of absorbing electromagnetic waves and preparation method thereof

The invention provides a porous glass ceramic capable of absorbing electromagnetic waves and a preparation method thereof, and relates to the field of preparation of inorganic non-metallic materials. The porous glass ceramic is used for preventing and absorbing the electromagnetic waves. The preparation method comprises the steps that cullet, ceramic granulation powder, silicon carbide and antimonous oxide are adopted to serve as base materials of an inorganic porous material, one or more of graphite, ferrite and SiC fiber serve as media for dissipating the electromagnetic waves, ball-milling mixing is conducted on the base materials and the media for dissipating the electromagnetic waves, foaming of the base materials is achieved at certain temperature, and the inorganic porous radar wave absorbing material is formed finally. By means of the porous glass ceramic capable of absorbing the electromagnetic waves and the preparation method thereof, the plate-shaped or special-shaped machined radar wave absorbing material which is lightweight, high in strength, capable of keeping heat and insulating the heat and excellent in wave absorbing property can be obtained.