Soft Ferrite Materials for Multilayer Inductors

Various families of soft ferrites (Ni–Cu–Zn; Mg–Cu–Zn; Co2–Z; Mn–Zn) with a sintering temperature of T≤950°C are used for multilayer inductors. It is shown for Ni–Cu–Zn and Mg–Cu–Zn ferrites that composition, powder particle size, and sintering additive concentration strongly affect the shrinkage, s...

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Bibliographic Details
Published in:International journal of applied ceramic technology 2006-11, Vol.3 (6), p.455-462
Main Authors: Töpfer, Jörg, Mürbe, Julia, Angermann, Andre, Kracunovska, Silvia, Barth, Stefan, Bechtold, Franz
Format: Article
Language:English
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Summary:Various families of soft ferrites (Ni–Cu–Zn; Mg–Cu–Zn; Co2–Z; Mn–Zn) with a sintering temperature of T≤950°C are used for multilayer inductors. It is shown for Ni–Cu–Zn and Mg–Cu–Zn ferrites that composition, powder particle size, and sintering additive concentration strongly affect the shrinkage, sintering behavior, microstructure, and magnetic properties. A maximum permeability of μi=700–900 is observed with a Bi2O3 addition of about 0.5 wt%. The maximum shrinkage can be shifted down to 700°C using nanosize powders. Z‐type hexaferrites with a permeability of 10 are used for high‐frequency applications up to 2 GHz.
ISSN:1546-542X
1744-7402
DOI:10.1111/j.1744-7402.2006.02110.x