Low temperature sintering radio frequency soft ferrite material,

Details Low temperature sintering radio frequency soft ferrite material, Low temperature sintering radio frequency soft ferrite material,

1997-06-19

1998-12-29

Bonner, Melissa

Compositions

Magnetic

Iron-oxygen compound containing

252 6262, 501 32, 501 49, 501 79, C03C 400, C03C 814, H01F 101

Patent

active

058536086

ABSTRACT:
A radio frequency soft ferrite material for manufacturing a device for shielding radio frequencies such as wire coiling inductors and chip components including chip inductors and chip beads is disclosed. Particularly, an Ni--Cu--Zn soft ferrite material and a method for manufacturing a wire coiling type or chip type inductor using the ferrite material are disclosed, in which a low temperature sintering is possible, the variations of the electromagnetic properties are low as against an external stress, and the radio frequency characteristics are superior. A B.sub.2 O.sub.3 --Bi.sub.2 O.sub.3 --ZnO glass is added in an amount of 1-25 wt % to the ordinary Ni--Cu--Zn soft ferrite powder, and this mixture is sintered at a temperature of 860.degree.-910.degree. C.

REFERENCES:
patent: 4741849 (1988-05-01), Naito et al.
patent: 5252521 (1993-10-01), Robets

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