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Ferrite material for communicating isolator and circulator and preparation method thereof

A technology of ferrite materials and circulators, applied in manufacturing tools, ceramic molding machines, etc., can solve problems such as insufficient electromagnetic performance and difficulty in adapting to technical requirements, and achieve reduced electron transfer, excellent electromagnetic performance and stability, and increased contact area effect

Inactive Publication Date: 2019-11-15
三桥惠(佛山)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electromagnetic properties of conventional yttrium iron garnet ferrite materials are still insufficient, it is difficult to adapt to higher technical requirements, and it needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) carry out batching by following weight parts: Y 2 0 3 40 parts, Fe 2 0 3 44 copies, Gd 2 o 3 3.5 parts, CaCO 3 3 parts, MnCO 3 2.5 parts, Bi 2 o 3 1 part, ZrO 2 0.4 parts, Al 2 o 3 0.4 copies;

[0027] (2) Mix the material obtained in step (1) evenly, then perform a ball mill in a ball mill, the ball-to-material ratio is 2.5:1, the rotating speed is 200r / min, and dry;

[0028] (3) Pre-burn the material obtained in step (2) at 1000°C for 3.5 hours, and after cooling, perform secondary ball milling in a ball mill with a ball-to-material ratio of 2.5:1 and a rotating speed of 280r / min, and dry;

[0029] (4) Mix the material obtained in step (3) with 3% polyvinyl alcohol aqueous solution in a mass ratio of 100:2, granulate to obtain 20-mesh granules, and then carry out gradient pressure compression molding. The first gradient is Pressing at 50MPa for 5s, the second gradient is pressing at 120MPa for 10s, the third gradient is pressing at 180MPa for 5...

Embodiment 2

[0031] (1) carry out batching by following weight parts: Y 2 0 3 42.5 parts, Fe 2 0 3 46 copies, Gd 2 o 3 4 parts, CaCO 3 3.8 parts, MnCO 3 3.2 parts, Bi 2 o 3 1.2 parts, ZrO 2 0.5 parts, Al 2 o 3 0.5 copies;

[0032] (2) Mix the materials obtained in step (1) evenly, then perform a ball mill in a ball mill, the ball-to-material ratio is 3:1, the rotating speed is 220r / min, and dry;

[0033](3) Pre-burn the material obtained in step (2) at 1020°C for 4 hours, and after cooling, perform secondary ball milling in a ball mill with a ball-to-material ratio of 3:1 and a rotating speed of 300r / min, and dry;

[0034] (4) Mix the material obtained in step (3) with the polyvinyl alcohol aqueous solution with a mass fraction of 4% in a mass ratio of 100:2.4, granulate to obtain 40-mesh granules, and then carry out gradient pressure compression molding. The first gradient is Pressed at 60MPa for 8s, the second gradient is pressed at 140MPa for 12s, the third gradient...

Embodiment 3

[0036] (1) carry out batching by following weight parts: Y 2 0 3 43.5 parts, Fe 2 0 3 48 copies, Gd 2 o 3 4.5 parts, CaCO 3 4 parts, MnCO 3 3.5 parts, Bi 2 o 3 1.5 parts, ZrO 2 0.6 parts, Al 2 o 3 0.6 copies;

[0037] (2) Mix the material obtained in step (1) evenly, then perform a ball mill in a ball mill, the ball-to-material ratio is 3.5:1, the rotating speed is 240r / min, and dry;

[0038] (3) Pre-burn the material obtained in step (2) at 1050°C for 4.5 hours, and after cooling, perform secondary ball milling in a ball mill with a ball-to-material ratio of 3.5:1 and a rotating speed of 320r / min, and dry;

[0039] (4) Mix the material obtained in step (3) with 5% polyvinyl alcohol aqueous solution in a mass ratio of 100:2.5, granulate, and obtain 60-mesh granules, and then carry out gradient pressure compression molding, the first gradient is Pressed at 80MPa for 10s, the second gradient is pressed at 150MPa for 15s, the third gradient is pressed at 200M...

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Abstract

The invention relates to the technical field of ferrite materials, and discloses a ferrite material for communicating an isolator and a circulator and a preparation method thereof. The ferrite material is prepared from, by weight, 40-43.5 parts of Y203, 44-48 parts of Fe2O3, 3.5-4.5 parts of Gd2O3, 3-4 parts of CaCO3, 2.5-3.5 parts of MnCO3, 1-1.5 parts of Bi2O3, 0.4-0.6 part of ZrO2 and 0.4-0.6 part of Al2O3. The ferrite material has the good characteristics that the ferromagnetic resonance line width is small, and the microwave dielectric loss is small, on the whole, the ferrite material hasthe good electromagnetic performance and stability, and the technical requirements of high-performance microwave devices, in particular to small-line-width ferrite microwave device can be met.

Description

technical field [0001] The invention relates to the technical field of ferrite materials, in particular to a ferrite material used for communication isolators and circulators. Background technique [0002] Ferrite is a metal oxide with ferrimagnetism. Its resistivity is much larger than that of single metal or alloy magnetic materials. It has high dielectric properties and high magnetic permeability at high frequencies. Microwave ferrite, also known as gyromagnetic ferrite, has a wide range of applications in civil and military fields such as radar, communication, television, artificial satellites, and missiles. It is widely used in the manufacture of microwave components such as isolators and circulators. The working principle of the device It mainly utilizes the tensor characteristic of the magnetic permeability of the microwave ferrite material and the ferromagnetic resonance effect. [0003] In recent years, with the development of electronic products such as microwave ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/622B28B3/00B28B1/00
CPCC04B35/2608C04B35/2641C04B35/622B28B3/00B28B1/004C04B2235/3225C04B2235/3224C04B2235/442C04B2235/3217C04B2235/3244C04B2235/3298
Inventor 龙克文胡锦文
Owner 三桥惠(佛山)新材料有限公司
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