Microwave absorbing properties of sintered Ni-Zn ferrite

Author

Kim, Sung-Soo ; Han, Dae-Hee ; Cho, Sung-Baeg

Author_Institution

Dept. of Mater. Eng., Chung-Buk Nat. Univ., Cheongju, South Korea

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4554

Lastpage

4556

Abstract

The systematic variation of magnetic permeability and dielectric constant and their relationship with microwave absorbing properties are investigated in sintered Ni-Zn ferrite. Toroidal compacts of (Ni_1-xZn_xO)(Fe₂O₃)spinels were prepared by conventional ceramic processing technique. The large change in magnetic permeability is observed by the variation of zinc content (x) in in the spinel lattice. High dielectric constant can be obtained by sintering the samples in the nitrogen (reducing) atmosphere. A combination of high dielectric constant and large magnetic loss results in a thin ferrite-tile absorber used at a lower frequency in VHF/UHF region

Keywords

electromagnetic wave absorption; ferrites; magnetic leakage; magnetic permeability; nickel compounds; permittivity; sintering; zinc compounds; (Ni_1-xZn_xO)(Fe₂O₃)spinels; NiZnFe₂O₄; dielectric constant; large magnetic loss; magnetic permeability; microwave absorbing properties; sintered Ni-Zn ferrite; thin ferrite-tile absorber; Atmosphere; Ceramics; Dielectric constant; Ferrites; High-K gate dielectrics; Lattices; Magnetic properties; Nitrogen; Permeability; Zinc;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334146

Filename

334146