▎ 摘　　要

NOVELTY - Preparing electromagnetic wave absorbing functional powder with sol-gel method comprises (i) adding raw material into the mixing cylinder, pre-mixing to obtain mixture A; (ii) adding the mixture A into distilled water to stir until the solution A is finished to be dissolved; (iii) adding citric acid to the solution A to uniformly mix to prepare solution B; (iv) adding aqueous ammonia in the solution B, adjusting the pH to obtain solution C; (v) drying the solution C through a drying device to obtain gel A; (vi) grinding the gel A into powder, heating the powder by muffle furnace to obtain substance A; and (vii) fully grinding the substance A to obtain the finished powder. USE - The method is useful in device to generate electromagnetic wave harm and protective clothing. ADVANTAGE - The method: has no influence on the self-coating performance of the powder.