Microstructure, Electromagnetic Properties, and Microwave Absorption Mechanism of SiO₂-MnO-Al₂O₃ Based Manganese Ore Powder for Electromagnetic Protection.

ABSTRACT: Considering the electromagnetic protection needs of important ground buildings, exploring the electromagnetic wave (EMW) absorption performance of manganese ore powder (MOP) building materials is an effective way to overcome its low added value and difficulty in popularizing. Here, choosing filling ratios commonly used in building materials such as autoclaved bricks, MOP/paraffin samples with 20%, 40%, and 60% mass fraction of MOP were prepared, and electromagnetic properties were analyzed at 2-18 GHz using the coaxial method. The results show that 60 wt% sample has the best absorption performance, with a minimum reflection loss (RL_min) value of -22.06 dB at 15.04 GHz, and the effective absorption bandwidth (EAB, RL < -10 dB) reaches 4.16 GHz at a 7.65 mm absorber thickness,

SUBMITTER: Cai R 

PROVIDER: S-EPMC9227126 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature