Mg-Cu-Zn ferrites for multilayer inductors
Mg-Cu-Zn ferrites for multilayer inductors
复制标题
多层电感器用镁铜锌铁氧体
DOI：
--
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Töpfer
中科院分区：
文献类型：
--
作者：
J. Mürbe;J. Töpfer
Mg-Cu-Zn铁氧体可以在T≤950°C下烧结至足够的密度，并显示出足够的磁导率分布，以用于多层铁氧体电感器。必须通过适当选择成分来优化磁导率和居里温度。具有<50mol%Fe2O3的铁氧体显示增强的致密化行为。细磨制备的亚微米粉体在900°C烧成后具有良好的烧结活性和致密度。通过共沉淀法或火焰合成法制备的纳米尺寸铁氧体粉末具有高密度;在T<800°C时已经出现最大收缩。使用Bi 2 O3作为烧结添加剂进一步改善了致密化，但也影响了微观结构，因此影响了渗透性。最大磁导率μi=450-500。
Mg–Cu–Zn ferrites can be sintered at T≤950°C to sufficient density and display adequate permeability profiles for application in multilayer ferrite inductors. The permeability and Curie temperature have to be optimized by proper selection of composition. Ferrites with <50 mol% Fe2O3 reveal enhanced densification behavior. Submicrometer powders prepared by fine milling show good sintering activity and density after firing at 900°C. Nano-size ferrite powders prepared by coprecipitation or flame synthesis lead to high density; maximum shrinkage already occurs at T<800°C. The use of Bi2O3 as a sintering additive further improves the densification, but also affects the microstructure and, hence, the permeability. A maximum permeability of μi=450–500 is obtained.