期刊
APPLIED SURFACE SCIENCE
卷 258, 期 24, 页码 10047-10052出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2012.06.072
关键词
Coating; CeO2; Zn-modified CeO2; Microwave absorption; Defects
类别
资金
- National Natural Science Foundation of China [50771082, 60776822]
- Doctorate Foundation and Graduate Starting Seed Fund of Northwestern Polytechnical University [CX201207, Z2011011]
CeO2 and Zn-modified CeO2 microstructures have been synthesized by a facile hydrothermal method and their microwave absorption properties have been investigated in detail. Complex permittivity and permeability of CeO2 and CeZn paraffin composites have been measured over the range of 2-18 GHz. Excellent microwave absorption properties have been obtained for CeO2 and CeZn microstructures compared with ZnO nanoparticles. Especially, maximum RL increases with increasing the concentration of CeZn microspheres in the composites and minimal RL value is -35 dB with 70 wt.% CeZn microspheres at 2.0 mm thickness. This phenomenon is attributed to both unique structure properties and geometric effect of CeO2 and CeZn microstructures. (C) 2012 Elsevier B.V. All rights reserved.
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