Electromagnetic Properties Of Ferrites Research Articles

Microstructure and Electromagnetic Properties of Microwave Sintered CoCuZn Ferrites

Co-Cu-Zn ferrite material has been extensively used in multilayer chip inductors because of their good electromagnetic properties at higher frequencies and low sintering temperatures. In this research work, a comparative study on Co-Cu-Zn ferrite prepared from two different routes is reported. The two different routes are conventional ceramic sintering method (CS) and is microwave sintered (MS) method. The former route is most commonly used while the latter one is now gaining popularity in sintering processes. The work highlights that the sintering temperature and time were significantly reduced from 4 h and 1250 °C for the CS process to 20 min and 900 °C for MS process. Moreover, microwave sintering also improves the physical and electromagnetic properties of ferrite.

Microstructure and Electromagnetic Properties of Microwave Sintered CoCuZn Ferrites

Co-Cu-Zn ferrite material has been extensively used in multilayer chip inductors because of their good electromagnetic properties at higher frequencies and low sintering temperatures. In this research work, a comparative study on Co-Cu-Zn ferrite prepared from two different routes is reported. The two different routes are conventional ceramic sintering method (CS) and is microwave sintered (MS) method. The former route is most commonly used while the latter one is now gaining popularity in sintering processes. The work highlights that the sintering temperature and time were significantly reduced from 4 h and 1250 °C for the CS process to 20 min and 900 °C for MS process. Moreover, microwave sintering also improves the physical and electromagnetic properties of ferrite.

記録用磁性材料 鉄・マンガン溶液の共ばい焼法によるフェライト材料製造プロセスの開発，事業化

The present review is concerned with the development of the power ferrite with high performance and low cost, which is especially manufactured by use of the spray roasting of Fe-Mn binary system. Electro-magnetic properties of ferrite are influenced by chemical composition and microstructure and also being very sensitive for stress induced in the grain and bulk. Therefore, to obtain the ferrite having high performance by the conventional solid phase reaction process, it is very important to use raw material powder with high purity and good dispersion itself. The highly homogeneous dispersion of Fe and Mn ions which are consist of the main composition of power ferrite, was successfully carried out by our new process which is characterized by the spray roasting the mixed solution of both Fe and Mn chloride, purified in advance. We finally established the whole process from raw materials to sintering process for the production of ferrite with higher performance and lower cost.