Journal
COMPOSITES PART B-ENGINEERING
Volume 176, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2019.107246
Keywords
Carbon material; RGO; A-site cation deficiency; Dielectric loss; Electromagnetic microwave absorption
Funding
- National Natural Science Foundation of China [51407134, 51801001]
- China Postdoctoral Science Foundation [2016M590619, 2016M601878]
- Natural Science Foundation of Shandong Province [ZR2019YQ24]
- Provincial Key Research and Development Program of Shaanxi [2019GY-197]
- Key Laboratory of Engineering Dielectrics and Its Application (Harbin University of Science and Technology), Ministry of Education [KFZ1803]
- Key Project of Baoji University of Arts and Sciences [ZK2018051]
- Natural Science Basic Research Plan in Shaanxi Province of China [2017JQ5116]
- Thousand Talents Plan for Young Professionals of Shaanxi Province
- Thousand Talents Plan
- World-Class University and Discipline
- Taishan Scholar's Advantageous and Distinctive Discipline Program of Shandong Province
- World-Class Discipline Program of Shandong Province
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Laminated hybrid carbon of amorphous carbon and RGO (reduced graphene oxide) perovskite composite, La0.8FeO3/C/RGO-BD, was fabricated by a simple method in one pot. The amorphous carbon was carbonized from a-glucose which also played a role as reducing agent. RGO provided a great condition for the formation of conductive loops. While A-site cation deficiency perovskite La0.8FeO3 doped at carbon nanosheets was induced to adjust the comprehensive microwave absorption properties. The phase and composition characteristics were studied by X-ray diffraction patterns (XRD), Raman and FT-IR spectrums and X-ray photoelectron spectroscopy (XPS), especially the confirmation of the existence of A-site cation deficiency and Oxygen vacancy. The morphology and microstructure of samples were visualized by a scanning electron microscope (SEM) and a transmission electron microscope (TEM). The electromagnetic microwave absorption properties were further studied, as the reflection loss of La0.8FeO3/C/RGO-BD reached -42.69 dB at 8.08 GHz with an effective band 2.72 GHz at 3.15 mm. And the excellent microwave absorption properties were confirmed by impedance matching, one quarter-wavelength theory, Debye relaxation polarization theory and eddy current loss.
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