Broadband microwave absorber constructed by reduced graphene oxide/La_0.7Sr_0.3MnO₃ composites.

ABSTRACT: High-performance microwave absorbing materials require optimized impedance matching and high attenuation ability. Here we meet the challenge by incorporating electric loss with magnetic loss materials to prepare carbon-based/magnetic hybrids. The reduced graphene oxide (rGO)/La_0.7Sr_0.3MnO₃ (LSMO) composites were prepared by dispersing the LSMO powders into 4.25, 6.25, 8.16, and 10 wt% of the graphene oxide aqueous solution, then the rGO/LSMO composites were formed by hydrothermal method. The pure rGO, LSMO, and rGO/LSMO composites were studied using X-ray diffraction and SEM. Microwave absorption properties were investigated by using coin method. Simulation studies show that 6.25 wt% of rGO/LSMO in a wax matrix exhibits the strongest reflection loss of -47.

SUBMITTER: Yan K 

PROVIDER: S-EPMC9082332 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature