Journal
CERAMICS INTERNATIONAL
Volume 48, Issue 7, Pages 9873-9881Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.12.190
Keywords
Composites; Dielectric properties; Functional applications; BaTiO3 and titanates
Categories
Funding
- National Natural Science Foundation of China [51902295]
- Hubei Province Natural Science Foundation grant [2020 CFB170]
- Wuhan Applied Foundational Frontier Project [2020010601012172]
- Hubei Province Natural Science Foundation [2019 CFB264]
- CJHI [CIGTWZ-2021005]
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An effective method to fabricate BTO/CIP composites with enhanced MA performance was prepared through multimaterial DLP 3D printing. A BGHSA with adjustable broadband absorption was obtained by varying compositional and structural design. The fabricated BGHSA exhibited significantly improved RL value and effective bandwidth compared with the reference, which was attributed to better impedance matching and waves multi-reflections.
An effective method to fabricate barium titanate (BTO)/carbonyl iron powder (CIP) composites with enhanced microwave absorption (MA) performance was prepared via multimaterial digital optical processing (DLP) 3D printing technique. The bilayer-gradient honeycomb structural absorber (BGHSA) with adjustable broadband can be obtained by leveraging of varying compositional and structural design (layered thickness ratios, and gradient structures). The optimal reflection loss (R-L) value and effective bandwidth of BGHSA can reach -51 dB and 15.4 GHz, respectively, exhibiting a distinct improvement (R-L increased by 32.4% and effective bandwidth by 42.9%) compared with the reference. The highly improved performances especially in the broadband absorption (15.4 GHz) were mainly attributed to the better impedance matching and waves multi-reflections. This work provides a promising strategy to fabricate functionally graded materials for potential application in the absorption of electromagnetic waves.
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