Ferrite material with high dielectric constant

Abstract

The invention belongs to the technical field of ferrite materials, and particularly relates to a ferrite material with a high dielectric constant, the ferrite material is a single-phase material, partof iron ions in the ferrite are replaced by titanium ions, cerium ions and zinc ions, the titanium ions exist in the form of positively charged Ti<4+> ions, the cerium ions exist in the form of positively charged Ce<4+> ions, the zinc ions exist in the form of positively charged Zn<2+> ions, and iron ions in the ferrite coexist in the form of Fe<3+> and Fe<2+> ions. The ferrite material is prepared by a sol-gel method, a specific preparation process is designed, the formation amount of Fe<2+> / Fe<3+> defect dipoles is increased on the basis of high magnetic performance, ferrite with extremelylow modulation voltage and high dielectric adjustable characteristics is obtained, and tests show that the dielectric constant epsilon is greater than or equal to 25, the ferromagnetic resonance linewidth [delta]H is less than or equal to 6 kA / m, and the dielectric loss tg[delta][epsilon] is less than or equal to 0.0005. The ferrite material has the characteristics of low cost anddielectric constant, and can be used for solving the problems of miniaturization and the like of microwave devices.

Description

technical field [0001] The invention belongs to the technical field of ferrite materials, and in particular relates to a ferrite material with high dielectric constant. Background technique [0002] With the rapid development of communication technology and electronic technology, the integration, miniaturization and multi-function of electronic devices will be an important development direction. If a material has good dielectric properties and magnetic properties at the same time, such as maintaining high magnetization while having capacitive properties, it will play a very important role in the application of materials in the field of multifunctional devices. In general, materials with high dielectric and magnetic properties are usually achieved by compounding multiple materials. For example, certain dielectric properties and magnetic properties can be simultaneously obtained through the compounding of ferroelectric and ferromagnetic materials. However, the compounding of...

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Problems solved by technology

However, the compounding of multiple materials is affected by the law of compounding, and the corresponding performance after compounding will be much lower than that of single-phase, and sometimes it is difficult to obtain ideal materials.

At present, through the introduction of the seepage effect, combined with some special processes, the composite materials obtained under certain conditions can have good dielectric properties and good magnetic permeability at the same time, and can be well obtained in related scientific and technological fields. application, but this kind of composite material is more complex than the preparation process, so the production cost is higher

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