Low temperature sintering radio frequency soft ferrite material, and method for manufacturing a wire coiling inductor core using such material

摘要

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°-910° C.