Preparation of SiO2-MnFe2O4 Composites via One-Pot Hydrothermal Synthesis Method and Microwave Absorption Investigation in S-Band.
Molecules
; 24(14)2019 Jul 17.
Article
in En
| MEDLINE
| ID: mdl-31319597
ABSTRACT
MnFe2O4 NPs are successfully decorated on the surface of SiO2 sheets to form the SiO2-MnFe2O4 composite via one-pot hydrothermal synthesis method. The phase identification, morphology, crystal structure, distribution of elements, and microwave absorbing properties in S-band (1.55~3.4 GHz) of the as-prepared composite were investigated by XRD, SEM, TEM, and Vector Network Analyzer (VNA) respectively. Compared with the pure MnFe2O4 NPs, the as-prepared SiO2-MnFe2O4 composite exhibits enhanced microwave absorption performance in this frequency band due to the strong eddy current loss, better impedance matching, excellent attenuation characteristic, and multiple Debye relaxation processes. The maximum reflection loss of -14.87 dB at 2.25 GHz with a broader -10 dB bandwidth over the frequency range of 1.67~2.9 GHz (1.23 GHz) can be obtained at the thickness of 4 mm. Most importantly, the preparation method used here is relatively simple, hence such composite can be served as a potential candidate for effective microwave absorption in S-band.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ferric Compounds
/
Manganese Compounds
/
Silicon Dioxide
/
Microwaves
Type of study:
Prognostic_studies
Language:
En
Journal:
Molecules
Journal subject:
BIOLOGIA
Year:
2019
Document type:
Article
Affiliation country:
China
Publication country:
CH
/
SUIZA
/
SUÍÇA
/
SWITZERLAND