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Low-saturation narrow-linewidth gyromagnetic material and preparation method thereof

A technology of gyromagnetic material and narrow line width, which is applied in the fields of magnetic materials, inorganic material magnetism, inductance/transformer/magnet manufacturing, etc., can solve the problems of the dielectric constant, line width, and Curie temperature indicators that are not up to standard, etc. Achieving the effect of high dielectric constant at Curie temperature, high performance preparation, and no deterioration of Curie temperature

Inactive Publication Date: 2021-02-23
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, under the requirement of low saturation magnetic moment, the existing ferrite still has the problem that the indicators of dielectric constant, line width, and Curie temperature are not up to standard.

Method used

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  • Low-saturation narrow-linewidth gyromagnetic material and preparation method thereof
  • Low-saturation narrow-linewidth gyromagnetic material and preparation method thereof
  • Low-saturation narrow-linewidth gyromagnetic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] This embodiment provides a kind of gyromagnetic material and preparation method thereof, the composition of gyromagnetic material is Bi 1.40 Y 0.3 Gd 0.24 Ca 1.06 Fe 3.67 V 0.225 Nb 0.055 Zr 0.5 In 0.5 mn 0.05 o 12

[0082] Prepared as follows:

[0083] ①One-time ball milling: According to the formula, pre-mix all raw materials first, and after mixing evenly, put these raw materials into a stainless steel ball mill tank, and add zirconium balls in a mass ratio of 1:1:1 according to the material, balls and medium and deionized water, add dispersant ammonium citrate (addition is 0.3% of powder quality in the ball mill) and carry out a wet ball mill simultaneously, and the ball mill time is 10h, and the ball mill rotating speed is set as 40r / min, and the ball mill product particle size is controlled as D50 1.57μm, D90 2.34μm; D993.08μm, the ratio of volume to surface area is 0.98μm.

[0084] ②Drying: Dry the slurry obtained from the primary ball milled slurry i...

Embodiment 2

[0093] This embodiment provides a kind of gyromagnetic material and preparation method thereof, the composition of gyromagnetic material is Bi 1.30 Y 0.3 Gd 0.05 Ca 1.35 Fe 4.025 V 0.425 Nb 0.1 Zr 0.15 In 0.15 sn 0.15 o 12

[0094] Prepared as follows:

[0095] ①Primary ball milling: Pre-mix all raw materials according to the formula, and after mixing evenly, put these raw materials into a stainless steel ball mill tank, add powder, balls and medium in a mass ratio of 1:1:1 to zirconium balls and Deionized water, adding dispersant (addition amount is 2% of powder quality in ball milling) carries out wet ball milling once, ball milling time is 10h, and ball mill rotating speed is set as 40r / min, and the particle size of solid particles in ball milling gained material is controlled as : D50 1.57 μm, D90 2.34 μm, D99 3.08 μm, the ratio of volume to surface area is 0.98 μm.

[0096] ②Drying: Dry the slurry from primary ball milling in an oven at 100°C. After the dryin...

Embodiment 3

[0105] This embodiment provides a kind of gyromagnetic material and preparation method thereof, the composition of gyromagnetic material is Bi 1.20 Y 0.2 Gd 0.2 Ca 1. 4 Fe 4 V 0.5 Nb 0.1 Zr 0.2 In 0.15 mn 0.05 o 12 ;

[0106] Prepared as follows:

[0107] ①Primary ball milling: Pre-mix all raw materials according to the formula, and after mixing evenly, put these raw materials into a stainless steel ball mill tank, add powder, balls and medium at a mass ratio of 1:1.2:1.5 into zirconium balls and Deionized water, adding dispersant (addition amount is 3% of powder mass in ball milling) carries out wet ball milling once, ball milling time is 18h, and ball mill rotating speed is set as 60r / min, the particle size control of solid particles in the slurry obtained by ball milling D50 is 0.5 μm, D90 is 1.3 μm, D99 is 1.5 μm, and the ratio of volume to specific surface area is 0.67 μm.

[0108] ②Drying: Dry the slurry from primary ball milling in an oven at 100°C. After ...

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Abstract

The invention relates to a low-saturation narrow-linewidth gyromagnetic material and a preparation method thereof. The gyromagnetic material comprises the following elements: BiAYBGd(3A-B-2a-2c-d)Ca(2a+2c+d+f)Fe(5-a-b-c-d-e-f)VaAlbNbbZrcIndSneMnfO12, wherein 0.8<=A<=1.4, 1.6<=B<=2.2, 0<=a<=0.8, 0.001<=b<=0.28, 0<=c<=0.75, 0<=d<=0.7, 0<=e<=0.7, 0<=f<=0.7, and 0<=g<=0.7. According to the microwave iron oxide provided by the invention, through reasonable design of components, the gyromagnetic material has the properties of low saturation, low loss, narrow linewidth, high Curie temperature and high dielectric constant by adjusting the content of each element, and the maximum substitution amount of Bi <3+> is controlled to be 1.4 mol. Zr <4+> is doped to replace octahedral Fe <3+>, the anisotropy constant K1 is reduced, so that the line width is reduced, Nb <5+> replaces Fe <3+> to inhibit the generation of other phases, V <5+> replaces Fe <3+> to reduce 4pi Ms, and meanwhile, the Curie temperature is not deteriorated.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a gyromagnetic material and a preparation method thereof, in particular to a low-saturation narrow-linewidth gyromagnetic material and a preparation method thereof. Background technique [0002] Gyromagnetic devices play an important role in microwave technology and are widely used in aerospace, satellite communications, electronic countermeasures, mobile communications, and medical treatment. As the core of devices, gyromagnetic materials are widely used in gyromagnetic circulator isolators. In the microwave system, the technical processing of the isolation of microwave transmission is realized. [0003] With the rapid development of microwave technology, the system has more and more urgent requirements for the miniaturization of components, and the volume of ferrite components is much higher than other components, so the task of miniaturization and light weight is particularl...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622H01F1/03H01F41/02
CPCC04B35/2675C04B35/622H01F1/0313H01F41/0253C04B2235/3262C04B2235/3279C04B2235/3298C04B2235/3244C04B2235/3286C04B2235/3208C04B2235/3239C04B2235/6562C04B2235/6567C04B2235/6583C04B2235/77C04B2235/661
Inventor 王媛珍吕飞雨张利康徐毅
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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