In:
Dalton Transactions, Royal Society of Chemistry (RSC), Vol. 52, No. 36 ( 2023), p. 12632-12645
Abstract:
CeO 2 , an n-type semiconductor material, has been widely used in microwave absorption (MA) due to its unique structural features such as oxygen vacancies and interstitial atoms. In this paper, Co/CeO 2 /C composites were prepared by a hydrothermal method followed by a pyrolysis process. The effect of different pyrolysis temperatures (650–950 °C) on the MA property of the composites was investigated. When the pyrolysis temperature was 850 °C, the Co/CeO 2 /C-850 composite exhibited outstanding MA behavior in the frequency range of 2–18 GHz, displaying a minimum reflection loss (RL min ) of −45.22 dB and an effective absorption bandwidth (EAB) of 4.61 GHz at a thin thickness of 1.75 mm. The MA performance of the Co/CeO 2 /C composites is mainly attributed to the dielectric loss due to interfacial polarization originating from different interfaces and dipole polarization caused by the oxygen vacancies in CeO 2 . In addition, the introduction of Co nanoparticles not only provides the magnetic loss but also modulates impendence matching for the current magnetoelectric coupling system.
Type of Medium:
Online Resource
ISSN:
1477-9226
,
1477-9234
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
1472887-4
Permalink