Microwave absorption behavior and electromagnetic properties of Ni-Zr doped La-Sr hexagonal ferrite synthesized by auto-combustion method

Journal Article · Sun Apr 15 04:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.12.006· OSTI ID:22803904

Kaur, Pawandeep; Bahel, Shalini

Highlights: • Quantitative analysis of Microwave Absorption for synthesized ferrites. • Maximum absorption was successfully predicted from quarter-wavelength method. • Minimum RL = −25.07 dB with 1.25 GHz bandwidth for composition x = 0.75. • Better gross loss tangent and Microwave Absorption in Ku-band. • Synthesized ferrites can be used as thin or thick sheet of microwave absorber. - Abstract: Strontium hexagonal ferrites with compositional formula Sr{sub 0.85}La{sub 0.15}(NiZr){sub x}Fe{sub 12-2x}O{sub 19}, where ‘x’ varies from 0.00 to 1.00 in steps of 0.25, were synthesized by auto-combustion method. Structural, magnetic, electromagnetic and microwave absorption properties of synthesized ferrites were studied. The vector network analyzer (VNA) was used to measure complex permittivity (ε′–jε′′) and complex permeability (μ′–jμ′′) in X-band (8–12.4 GHz) and Ku-band (12.4–18 GHz) frequency range. The minimum reflection loss curves were obtained using back metal plate method for analyzing absorption properties of the material. All the synthesized ferrites show maximum absorption in Ku-band for sample thickness in the range of 1.6–1.68 mm. These newly synthesized ferrites have great potential to be used as thin microwave absorber sheets with minimum reflection loss values in the range of –19.69 dB to −27.8 dB and bandwidth in the range of 680 MHz–1.25 GHz.

• OSTI ID: 22803904
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 100; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
DOPED MATERIALS
FERRITES
GHZ RANGE
HEXAGONAL LATTICES
MHZ RANGE
MICROWAVE RADIATION
PERMEABILITY
PERMITTIVITY
REFLECTION
SHEETS
STRONTIUM COMPOUNDS
WAVELENGTHS
ZIRCONIUM