Abstract
In this article the main characteristics for emerging MnZn-ferrite applications are described on the basis of the new demands they possess on the ferrite material development. A number of recently developed MnZn-ferrite materials is presented together with the main scientific principles lying behind their development. These include: (i) high saturation flux density MnZn-ferrites (i.e. Bsat=550 mT at 10 kHz, 1200 A/m, 100 o C), (ii) low power losses MnZn-ferrites (i.e. Pv~210 mW cm -3 at 100 kHz, 200mT, 100 o C), (iii) MnZn-ferrites with broad temperature stability (i.e. PV<375 mW cm -3 for 25 o C<T<140 o C at 100 kHz, 200 mT), and (iv) MnZn- ferrites with high and frequency stable permeability (i.e. μi~12600 at 10 kHz, 0.1 mT, 25 o C and tan(δ)/μi=20.5x10 -6 at 100 kHz). In a final discussion the importance of defect chemistry for the time stability and stress sensitivity of the magnetic properties is discussed and some important issues are addressed, encountered during the transfer of a laboratory developed material to a large scale industrial production process.
Highlights
MnZn-ferrites is the class of soft magnetic materials with the widest range of technological applications [1, 2]
Some issues will be addressed in relation to property stability and the transfer of laboratory developed materials to large scale industrial production
Low loss MnZn-ferrite materials for low frequency power applications have been developed with power losses of ~210 mW cm-3 (f=100 kHz, B=200 mT, T=100oC)
Summary
MnZn-ferrites is the class of soft magnetic materials with the widest range of technological applications [1, 2]. They are used in magnetic components that, basically, perform inductive, transforming or absorbing functions and can be found almost in all electric, electronic or telecommunication equipment. The fundamental principles of antiferromagnetism / ferrimagnetism have been outlined several decades ago [3, 4], new MnZn-ferrite materials are being continuously developed in order to meet the continuously evolving demands of new applications. Some new application examples are described with emphasis on the ferrite material requirements and the basic principles along which new materials have been developed. Some issues will be addressed in relation to property stability and the transfer of laboratory developed materials to large scale industrial production
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
