High saturated magnetic flux density and low loss manganese-zinc ferrite material and its preparing method

Abstract

The present invention discloses high saturated magnetic flux density and low loss manganese manganese-zinc ferrite material and its preparation process. The manganese-zinc ferrite material contains: Fe2O3 52-54 mol%, MnO 33-40 mol%, ZnO 8-13 mol%, supplementary components CaCO3 100-600 ppm, SiO2 50-300 ppm and other metal oxides. The preparation process includes the steps of: mixing material, pre-sintering, adding supplementary components, secondary ball milling, forming and sintering. The supplementary components are common oxide grains, and this result in easy adding and low cost. The preparation process of the manganese-zinc ferrite material has relatively low pre-sintering and sintering temperature and relaxed requirement on sintering apparatus, may be completed in common vacuum sintering furnace, and easily realized in industrial production.

Description

technical field

[0001] The invention relates to a manganese-zinc ferrite material with high saturation magnetic flux density and low loss and a preparation method thereof. Background technique

[0002] Manganese-zinc ferrite materials are currently widely used in electronic equipment components such as communications, electronic computers, televisions and various digital products, and are the largest type of soft ferrite materials in mass production. Among them, power manganese-zinc ferrite is the largest classification of manganese-zinc ferrite, and its main application is to prepare the main transformer of various high-frequency switching power supplies. The main development trend of switching power supply is miniaturization and low loss, which requires that the MnZn ferrite used as the core of the main transformer should have higher saturation flux density and lower power consumption.

[0003] In recent years, digital cameras, digital video cameras and mobile communicati...

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