Doped, conductive SiO ₂ nanoparticles for large microwave absorption.

ABSTRACT: Although many materials have been studied for the purpose of microwave absorption, SiO₂ has never been reported as a good candidate. In this study, we present for the first time that doped, microwave conductive SiO₂ nanoparticles can possess an excellent microwave absorbing performance. A large microwave reflection loss (RL) of -55.09 dB can be obtained. The large microwave absorption originates mainly from electrical relaxation rather than the magnetic relaxation of the incoming microwave field. The electrical relaxation is attributed to a large electrical conductivity that is enabled by the incorporation of heterogeneous (N, C and Cl) atoms. The removal of the magnetic susceptibility only results in a negligible influence of the microwave absorption. In contrast, th

SUBMITTER: Green M 

PROVIDER: S-EPMC6234207 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature