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Garnet ferrite with high temperature stability and preparation method thereof

A technology of garnet and ferrite, which is applied in the field of microwave magnetic material preparation, can solve the problems of less material reports, and achieve the effects of optimizing microstructure and performance, improving temperature stability, and low ferromagnetic resonance linewidth

Active Publication Date: 2019-06-11
江西尚朋电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, people have developed a variety of low-loss garnet microwave ferrites, but for low 4πM ferrites with high temperature stability s , Low ΔH garnet ferrite materials are rarely reported

Method used

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  • Garnet ferrite with high temperature stability and preparation method thereof
  • Garnet ferrite with high temperature stability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of garnet ferrite with high temperature stability, comprising the following steps:

[0027] Step 1. Weighing: Y 2 o 3 、Gd 2 o 3 , Fe 2 o 3 、Al 2 o 3 , Mn 3 o 4 , CaCO 3 , ZrO 2 , V 2 o 5 As raw material, according to the structural formula Y 2.7-x Ca 0.3-z Gd x al y Fe 4.68-y-z Zr 0.3 mn 0.02 V z o 12 (wherein x=0.4, y=1.2, z=0.05) ratio, take raw material;

[0028] Step 2, a ball mill: put the raw material weighed in step 1 into a steel ball mill tank, use deionized water as a solvent, and perform ball milling according to the mass ratio of material: water: zirconium balls = 1:1.5:4, and the ball mill speed is 241 revolution / min, ball milling time 6h;

[0029] Step 3, pre-burning: take out the slurry obtained after the first ball milling in step 2, dry it in an oven, put it into a box furnace, and pre-fire it for 2 hours in an air atmosphere at a temperature of 1100°C;

[0030] Step 4, secondary ball milling: crush the calci...

Embodiment 2

[0035] A preparation method of garnet ferrite with high temperature stability, comprising the following steps:

[0036] Step 1. Weighing: Y 2 o 3 、Gd 2 o 3 , Fe 2 o 3 、Al 2 o 3 , Mn 3 o 4 , CaCO 3 , ZrO 2 , V 2 o 5 As raw material, according to the structural formula Y 2.7-x Ca 0.3-z Gd x al y Fe 4.68-y-z Zr 0.3 mn 0.02 V z o 12 (wherein x=0.2, y=1.2, z=0.1) ratio, take raw material;

[0037] Step 2, a ball mill: put the raw material weighed in step 1 into a steel ball mill tank, use deionized water as a solvent, and perform ball milling according to the mass ratio of material: water: zirconium balls = 1:1.5:4, and the ball mill speed is 241 revolutions per minute, ball milling time 4h;

[0038] Step 3, pre-burning: take out the slurry obtained after the first ball milling in step 2, dry it in an oven, put it into a box furnace, and pre-fire it for 2 hours in an air atmosphere at a temperature of 1100°C;

[0039] Step 4, secondary ball milling: crush th...

Embodiment 3

[0044] A preparation method of garnet ferrite with high temperature stability, comprising the following steps:

[0045] Step 1. Weighing: Y 2 o 3 、Gd 2 o 3 , Fe 2 o 3 、Al 2 o 3 , Mn 3 o 4 , CaCO 3 , ZrO 2 , V 2 o 5 As raw material, according to the structural formula Y 2.7-x Ca 0.3-z Gd x al y Fe 4.68-y-z Zr 0.3 mn 0.02 V z o 12 (wherein x=0.6, y=1.0, z=0.2), the raw material is weighed;

[0046] Step 2, a ball mill: put the raw material weighed in step 1 into a steel ball mill tank, use deionized water as a solvent, and perform ball milling according to the mass ratio of material: water: zirconium balls = 1:1.5:4, and the ball mill speed is 241 revolution / min, ball milling time 6h;

[0047] Step 3, pre-burning: take out the slurry obtained after the first ball milling in step 2, dry it in an oven, put it into a box furnace, and pre-fire it in an air atmosphere at a temperature of 1100°C for 3 hours;

[0048] Step 4, secondary ball milling: crush the ca...

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Abstract

The invention discloses garnet ferrite with high temperature stability and a preparation method thereof, and belongs to the technical field of preparation of microwave magnetic materials. The structural formula of the garnet ferrite is Y<2.7-x>Ca<0.3-z>Gd<x>Al<y>Fe<4.68-y-z>Zr<0.3>Mn<0.02>V<z>O<12>, wherein x is greater than or equal to 0.2 and less than or equal to 0.8, y is greater than or equalto 0.6 and less than or equal to 1.4, and z is greater than or equal to 0.05 and less than or equal to 0.20. According to the garnet ferrite with high temperature stability, Gd<3+>, Al<3+> and V<5+>are simultaneously introduced for substitution, and a Bi2O3 additive is doped, so that alpha<4[phi]Ms> of the obtained garnet ferrite material in a temperature range from -55 DEG C to +85 DEG C is ina range of 0.360-0.475% / DEG C, the temperature of 4[pi]Ms at normal temperature is in a range of 300-500 Gs, and the Curie temperature T<c> is in a range of 110-165 DEG C. in addition, a low ferromagnetic resonance linewidth of the material can be ensured while temperature stability of the material is greatly improved

Description

technical field [0001] The invention belongs to the technical field of microwave magnetic material preparation, in particular to a high temperature stability, low saturation magnetization (4πM s ), a garnet ferrite with a low ferromagnetic resonance linewidth (ΔH) and a preparation method thereof. Background technique [0002] Microwave ferrite circulators and isolators use the gyromagnetic properties of ferrite materials under the combined action of a mutually perpendicular external microwave field and a steady DC field to achieve one-way transmission or isolation of control signals. As a key material for circulators and isolators, the properties of ferrite materials (such as: saturation magnetization, magnetoelectric loss, and temperature stability, etc.) have an important impact on device performance. With the rapid development of the defense industry and microwave communication technology, people have put forward more stringent requirements for microwave ferrite circula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40H01F41/00H01F1/01
Inventor 蒋晓娜丁一余忠孙科郭荣迪焦斌邬传健兰中文
Owner 江西尚朋电子科技有限公司
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