J. Phys. IV France 07 (1997) C1-115-C1-116
Effect of Additions and Oxygen Partial Pressure on the Electromagnetic Properties of High Frequency MnZn FerritesA. Znidarsic1, I. Feriti1 and M. Drofenik2
1 Stegne 29, 1000 Ljubljana, Slovenia
2 Jozef Stefan Institute, Jamova 39, 1001 Ljubljana, Slovenia
The effect of dopant and low oxygen partial pressure during sintering on the magnetic properties of MnZn ferrites for use in high frequency power supplies was studied. A low partial pressure of oxygen in the sintering atmosphere and a proper temperature profile during sintering decrease the average grain size, while the dopant, which segregates to the outer grain region, increases the grain boundary resistivity resulting in a lowering of power loss.
© EDP Sciences 1997