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Ferrite material with high dielectric constant

A ferrite material, high dielectric constant technology

Inactive Publication Date: 2021-03-09
江西耀润磁电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Ferrite material with high dielectric constant

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Effect test

preparation example Construction

[0029] The preparation method of described ferrite material, comprises the steps:

[0030] S1. Ferric nitrate and citric acid are mixed, add deionized water to dissolve, obtain the first solution, in this solution, the total molar concentration of ferric nitrate and citric acid is controlled at 1.0mol / L;

[0031] S2. Tetrabutyl titanate and citric acid are mixed, dissolved in analytical grade ethanol to obtain a second solution, and the total molar concentration of tetrabutyl titanate and citric acid in the solution is controlled at 1.5mol / L;

[0032] S3. Slowly add the second solution to the first solution, and stir evenly to obtain the third solution;

[0033] S4. Adjust the pH of the third solution to 10-13 with 2mol / L sodium hydroxide solution, then heat to volatilize the solvent, and then dry the obtained sol at 135° C. to obtain a fluffy xerogel;

[0034] S5. heat-treating the fluffy xerogel at 520°C for 2 hours, and then heat-treating the product at 980-1050°C for 1-2 ...

Embodiment 1

[0040] A ferrite material with a high dielectric constant, the ferrite material is a single-phase material, part of the iron ions in the ferrite are replaced by titanium ions, cerium ions and zinc ions, and the titanium ions are replaced by positively charged Ti 4+ Ions exist, and cerium ions are positively charged Ce 4+ Ions exist, and zinc ions are positively charged Zn 2+ ions exist, the iron ions in ferrite are Fe 3+ and Fe 2+ Ionic forms coexist, according to the chemical formula of the ferrite material Fe 12-x-y-z-δ Ti x Ce y Zn z o 18 , wherein, x=0.6, y=0.5, z=0.4, iron deficiency amount δ=0.06, calculate the amount of raw materials;

[0041] The preparation method of described ferrite material, comprises the steps:

[0042] S1. Ferric nitrate and citric acid are mixed, add deionized water to dissolve, obtain the first solution, in this solution, the total molar concentration of ferric nitrate and citric acid is controlled at 1.0mol / L;

[0043] S2. Tetrabutyl ...

Embodiment 2

[0055] A ferrite material with a high dielectric constant, the ferrite material is a single-phase material, part of the iron ions in the ferrite are replaced by titanium ions, cerium ions and zinc ions, and the titanium ions are replaced by positively charged Ti 4+ Ions exist, and cerium ions are positively charged Ce 4+ Ions exist, and zinc ions are positively charged Zn 2+ ions exist, the iron ions in ferrite are Fe 3+ and Fe 2+ Ionic forms coexist, according to the chemical formula of the ferrite material Fe 12-x-y-z-δ Ti x Ce y Zn z o 18 , wherein, x=0.8, y=0.3, z=0.5, iron deficiency amount δ=0.02, calculate the amount of raw material;

[0056] The preparation method of described ferrite material, comprises the steps:

[0057] S1. Ferric nitrate and citric acid are mixed, add deionized water to dissolve, obtain the first solution, in this solution, the total molar concentration of ferric nitrate and citric acid is controlled at 1.0mol / L;

[0058] S2. Tetrabutyl t...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/40C04B35/622C04B35/624C04B35/626C04B35/64H01F1/10H01F1/34
CPCC04B35/2675C04B35/622C04B35/624C04B35/626C04B35/64C04B2235/3229C04B2235/3232C04B2235/3284C04B2235/6562C04B2235/6567H01F1/10H01F1/344
Inventor 陈国良陈有标汤小明
Owner 江西耀润磁电科技有限公司
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