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Study on electromagnetic properties of MgCuZn ferrite/BaTiO_3 composites

机译：MgCuZn铁氧体/ BaTiO_3复合材料的电磁性能研究

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摘要

The low temperature co-firing compatibility between ferrite and dielectric materials is the key issue in the production of multilayer chip inductive-capacitive filters. A new composite comprising dielectric-ferrite ceramics was prepared by mixing MgCuZn ferrite with BaTiO_3 based commercial dielectrics. (Mg_(0.25)Cu_(0.20)Zn_(0.55))Fe_2O_4 ferrite powder was synthesized through sol-gel auto-combustion method. Commercial Z5U type dielectric powder was used as such. Dielectric-ferrite mixed powder was uniaxially pressed into toroids and pellets. Specimens were sintered at 950 ℃. The co-sintering behavior of dielectric-ferrite in composite was investigated using thermo-mechanical analyzer. The co-existence of spinel ferrite and BaTiO_3 pure phases were confirmed by X-ray diffraction analysis. The permittivity of composite continuously decreases and permeability increases with increasing ferrite content. Dielectric and magnetic losses in the composite increased due to the generation of interfacial charges in the ferrite-ferroelectric interface.
机译：铁氧体和介电材料之间的低温共烧兼容性是多层芯片电感电容滤波器生产中的关键问题。通过将MgCuZn铁氧体与BaTiO_3基商业电介质混合，制备了一种新的包含电介质-铁氧体陶瓷的复合材料。通过溶胶-凝胶自动燃烧法合成了（Mg_（0.25）Cu_（0.20）Zn_（0.55））Fe_2O_4铁氧体粉末。照这样使用市售的Z5U型电介质粉末。将电介质-铁氧体混合粉末单轴压制成环形和颗粒。标本在950℃下烧结。用热机械分析仪研究了复合材料中电介质-铁氧体的共烧结行为。 X射线衍射分析证实了尖晶石型铁氧体和BaTiO_3纯相的共存。随着铁素体含量的增加，复合材料的介电常数不断降低，磁导率增加。复合材料中的介电和磁损耗由于在铁氧体-铁电界面中产生界面电荷而增加。

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