Mn - zn - ferrite - production process, mn - zn - ferrite and use thereof in power supply units

摘要

Mn - zn - ferrite - a manufacturing method comprising a maximum temperature - hold stage for firing and a cooling stage in a nitrogen atmosphere, characterized in that a nitrogen atmospheres - change in temperature t in the cooling step under 1150°C. and is equal to or higher than 1000°C, and a cooling extent v1 one of the by the following formula (1) corresponds to defined condition: T ≦ (v1 + 1450) / 1,5 (1),in the t is the nitrogen atmospheres - change in temperature in °C. and v1 the cooling extent in °C. / h from t to down to 900°C. are.