Title :
High performance NiZn ferrite
Author :
Matsuo, Y. ; Inagaki, M. ; Tomozawa, T. ; Nakao, F.
Author_Institution :
Adv. Technol. Lab., FDK Corp., Shizuoka, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
High-performance NiZn ferrite was developed for use in mini DC-DC converters and inductors. In the development process, attention was focused on a small amount of MnO2 contained in NiZn ferrite. The quantity of MnO2 was examined as to its effects on the crystal structure and magnetic properties of NiZn ferrite cores. It was confirmed that core loss can be reduced by optimizing the MnO2 content. This was attributed to the decrease of lattice strain in the crystal structure of the core by a change in MnO2 content, which causes a chain reaction of a coercive force decline and then a hysteresis loss decline. As a result, we were able to develop a top class low-loss NiZn ferrite
Keywords :
coercive force; crystal structure; ferrites; internal stresses; magnetic cores; magnetic hysteresis; magnetic leakage; manganese compounds; nickel compounds; zinc compounds; MnO2; MnO2 content; NiZn ferrite cores; NiZnFe2O4:MnO2; chain reaction; coercive force; core loss; crystal structure; high performance NiZn ferrite; hysteresis loss; inductors; lattice strain; low-loss NiZn ferrite; magnetic properties; mini DC-DC converters; Coercive force; Core loss; DC-DC power converters; Ferrites; Inductors; Lattices; Magnetic cores; Magnetic field induced strain; Magnetic hysteresis; Magnetic properties;
Journal_Title :
Magnetics, IEEE Transactions on
