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

A technology of gyromagnetic materials and narrow line width, which is applied in the direction of magnetic materials, inorganic material magnetism, inductance/transformer/magnet manufacturing, etc., and can solve the problems of dielectric constant, line width, and Curie temperature indicators that are not up to standard

Active Publication Date: 2022-01-07
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 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

[0083] This embodiment provides a kind of gyromagnetic material and preparation method thereof, the composition of gyromagnetic material is Bi 0.8 Y 1.6 Gd 0.37 Ca 0.3 6 Fe 4.55 V 0.1 al 0.1 Nb 0.1 Zr 0.01 In 0.01 sn 0.1 mn 0.13 o 12

[0084] Prepared as follows:

[0085] ①Primary 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 according to the mass ratio of material, balls and medium at a ratio of 1:1.2:2 and deionized water, add dispersant ammonium citrate (addition is 4.8% of powder quality in the ball mill) and carry out a wet ball mill simultaneously, and the ball mill time is 23h, and the ball mill rotating speed is set as 66r / min, and the ball mill product particle size is controlled as D50 1.23 μm, D90 7.55 μm; D99 10 μm, the ratio of volume to surface area is 0.005 μm.

[0086] ②Drying: Dry the slurry obtained from the...

Embodiment 2

[0095] This embodiment provides a kind of gyromagnetic material and preparation method thereof, the composition of gyromagnetic material is Bi 0.83 Y 1.68 Gd 0.02 Ca 0.616 Fe 4.378 V 0.13 al 0.18 Nb 0.18 Zr 0.1 In 0.01 sn 0.056 mn 0.146 o 12

[0096] Prepared as follows:

[0097] 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 1:3:0.6 to zirconium balls and Deionized water, adding a dispersant (ammonia, the addition is 2% of the mass of the powder in the ball mill) to carry out a wet ball mill, the ball mill time is 12h, the ball mill speed is set to 25r / min, the particle size of the solid particles in the ball mill obtained material The control is: D50 0.01 μm, D90 0.1 μm, D99 5 μm, and the ratio of volume to surface area is 1.5 μm.

[0098] ②Drying: Dry the slurry from primary ball milling in an oven ...

Embodiment 3

[0107] This embodiment provides a kind of gyromagnetic material and preparation method thereof, the composition of gyromagnetic material is Bi 1.3 Y 1.6 Gd 0.083 Ca 0.577 Fe 4.09 V 0.002 al 0.2 Nb 0.2 Zr 0.005 In 0.003 sn 0.14 mn 0.56 o 12

[0108] Prepared as follows:

[0109] 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 1:1:0.6 to zirconium balls and Deionized water, adding dispersant (castor oil, the addition is 0.3% of the powder mass in the ball mill) to carry out a wet ball mill, the ball mill time is 10h, the ball mill speed is set to 76r / min, the solid particles in the ball mill gained slurry The particle size control of D50 is 1.5μm, D90 is 6.8μm, D99 is 12.3μm, and the ratio of volume to specific surface area is 1.32μm.

[0110] ②Drying: Dry the slurry from primary ball milling in an oven a...

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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(3-A-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, and 0<=f<=0.7. According to the microwave iron oxide provided by the invention, the components are reasonably designed, and the content of each element is adjusted, so that the gyromagnetic material has the properties of low saturation, low loss, narrow linewidth, high Curie temperature and high dielectric constant, 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 anisotropic constant K1 is reduced, so that the line width is reduced, Nb<5+> replaces Fe<3+> to inhibit generation of other phases, V<5+> replaces Fe<3+> to reduce 4pi Ms, and meanwhile, the Curie temperature is not deteriorated.

Description

[0001] This application claims the priority of the patent application No. 202011380885.4 (the filing date of the earlier application is November 30, 2020, and the title of the invention is a low-saturation narrow-linewidth gyromagnetic material and its preparation method). technical field [0002] 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 [0003] 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. [0004] W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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