Work

The microwave dielectric, magnetic, and absorption properties of natural sands

Year: 2025

Type: article

Abstract: Recently, much effort has been made into the study of the microwave absorption performance of various materials. In this study, we present such performance investigations of natural sands through microwave dielectric and magnetic measurements using the transmission line technique. The results show that at small thickness, barely any absorption is observed; large and wide-range absorption is displayed across the entire 1.0 GHz to 18.0 GHz frequency when the thickness is increased to a substantial value (which needs to be reduced to be more practically useful with new materials). The contributions of the permittivity and permeability on the microwave absorption are revealed upon the comparative studies of the microwave absorption performance under the assumption of zero electrical or magnetic relaxations. Magnetic relaxation instead of electrical relaxation seems to play a large role in the microwave absorption, which can be eventually related to the trace amount of impurities in the natural sand.

Source: Nano Materials Science

DOI: 10.1016/j.nanoms.2025.02.007

Authors: Cadao Nguyen, Jalen C. Gibbs, Michael Green, Merina Sah, James Murowchick, Xiaobo Chen

Institution: University of Missouri–Kansas City

Language: English

Topic: Electromagnetic wave absorption materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: diamond

Funders: National Science Foundation, University of Missouri-Kansas City, Natural Resources, Energy and Science Authority of Sri Lanka

Award: Understanding the Microwave Absorption of Hydrogenated TiO2 Nanoparticles