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Garnet ferrite material with high dielectric constant and preparation method thereof

A technology of ferrite materials and high dielectric constant, which is applied in the manufacture of inductors/transformers/magnets, magnetic materials, and the magnetism of inorganic materials, etc. It can solve problems such as limited practicality, lack of miniaturization potential, and inability to take into account temperature characteristics. , to achieve the effect of reducing the size and meeting the needs of miniaturization design

Inactive Publication Date: 2021-03-09
BEIJING INST OF RADIO MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patents mentioned above or in order to obtain narrow line width ΔH, Bi 3+ The amount of doping is very small, the dielectric constant ε' of the material is limited, and there is no potential for miniaturization; or in order to pursue no rare earth addition, a large amount of Bi is added 3+ , using a large number of octahedral non-magnetic ions to replace, the ferromagnetic resonance line width ΔH and the temperature characteristics of the saturation magnetization Ms cannot be taken into account, and the practicability is limited

Method used

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  • Garnet ferrite material with high dielectric constant and preparation method thereof

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Embodiment 1

[0029] Embodiment 1 A kind of preparation method of the garnet ferrite material of high dielectric constant

[0030] A high dielectric constant garnet ferrite material with a garnet structure and a chemical formula of Y 3-a-b-(2c+d+e) Gd a Bi b Ca 2c+d+e V c Zr d sn e mn f al g Fe 5-c-d-e-f-g-δ o 12 , where a=0, b=1.5, c=0, d=0.4, e=0.3, f=0, g=0, δ=0.3.

[0031] The specific preparation method is as follows:

[0032] Ingredients: according to formula Y 3-a-b-(2c+d+e) Gd a Bi b Ca 2c+d+e V c Zr d sn e mn f al g Fe 5-c-d-e-f-g-δ o 12 , wherein a=0, b=1.5, c=0, d=0.4, e=0.3, f=0, g=0, δ=0.3, calculate and take each raw material; Said raw material is Y 2 o 3 、 Bi 2 o 3 , CaCO 3 , ZrO 2 , SnO 2 , Fe 2 o 3 .

[0033] Primary ball milling: Put each raw material, steel balls, and deionized water into a rolling ball mill. The mass ratio of the total mass of each raw material, steel balls, and deionized water is 1:3:2, and roll the ball mill for 24 hours ...

Embodiment 2

[0042] Embodiment 2 A kind of preparation method of garnet ferrite material with high dielectric constant

[0043] A high dielectric constant garnet ferrite material with a garnet structure and a chemical formula of Y 3-a-b-(2c+d+e) Gd a Bi b Ca 2c+d+e V c Zr d sn e mn f al g Fe 5-c-d-e-f-g-δ o 12 , where a=0.7, b=1.2, c=0.2, d=0.7, e=0, f=0.15, g=0.1, δ=0.2.

[0044] The specific preparation method is as follows:

[0045] Ingredients: according to formula Y 3-a-b-(2c+d+e) Gd a Bi b Ca 2c+d+e V c Zr d sn e mn f al g Fe 5-c-d-e-f-g-δ o 12 , where a=0.7, b=1.2, c=0.2, d=0.7, e=0, f=0.15, g=0.1, δ=0.2, calculate and weigh each raw material, the raw material is Gd 2 o 3 、 Bi 2 o 3 , CaCO 3 , V 2 o 5 , ZrO 2 , MnCO 3 、Al 2 o 3 , Fe 2 o 3 .

[0046] Primary ball milling: put each raw material, steel balls, and deionized water into a rolling ball mill. The mass ratio of the total mass of each raw material, steel balls, and deionized water is 1:2:2, ...

Embodiment 3

[0055] Embodiment 3 A kind of preparation method of garnet ferrite material with high dielectric constant

[0056] A high dielectric constant garnet ferrite material with a garnet structure and a chemical formula of Y 3-a-b-(2c+d+e) Gd a Bi b Ca 2c+d+e V c Zr d sn e mn f al g Fe 5-c-d-e-f-g-δ o 12 , where a=1.2, b=0.6, c=0, d=0.5, e=0, f=0.1, g=0.5, δ=0.25.

[0057] The specific preparation method is as follows:

[0058] Ingredients: according to formula Y 3-a-b-(2c+d+e) Gd a Bi b Ca 2c+d+e V c Zr d sn e mn f al g Fe 5-c-d-e-f-g-δ o 12 , where a=1.2, b=0.6, c=0, d=0.5, e=0, f=0.1, g=0.5, δ=0.25, calculate and weigh each raw material, and the raw material is Y 2 o 3 、Gd 2 o 3 、 Bi 2 o 3 , CaCO 3 , ZrO 2 , MnCO 3 、Al 2 o 3 , Fe 2 o 3 ;

[0059] Primary ball milling: Put each raw material, steel balls, and deionized water into a rolling ball mill. The mass ratio of the total mass of each raw material, steel balls, and deionized water is 1:4:2, a...

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Abstract

The invention discloses a garnet ferrite material with a high dielectric constant and a preparation method thereof. The chemical formula of the garnet ferrite material is Y3-a-b-(2c+d+e)GdaBibCa2c+d+eVcZrdSneMnfAlgFe5-c-d-e-f-g-delta O12, a is greater than 0 and less than or equal to 1.2, b is greater than or equal to 0.6 and less than or equal to 1.5, c is greater than 0 and less than or equal to0.6, d is greater than 0 and less than or equal to 0.7, e is greater than 0 and less than or equal to 0.7, f is greater than 0 and less than or equal to 0.15, g is greater than 0 and less than or equal to 0.5, and delta is greater than 0 and less than or equal to 0.3, the delta is process iron deficiency amount. The invention further provides a preparation method of the material. The garnet ferrite material with the high dielectric constant has the temperature characteristics of narrow resonance line width delta H and excellent saturation magnetization intensity Ms, can effectively reduce thesize of a central junction region of a microwave ring / isolator, and meets the miniaturization design requirement of a device.

Description

technical field [0001] The invention relates to the technical field of microwave ferrite materials. More specifically, it relates to a high dielectric constant garnet ferrite material and a preparation method thereof. Background technique [0002] With the rapid development of microwave technology in recent years, in the core fields of aerospace, mobile communication, etc., the system has more and more urgent requirements for the miniaturization and lightweight of components. As an important part of the system, the microwave ferrite circulator / The size of the isolator is far larger than other components, and its miniaturization work is obviously lagging behind. The dielectric constant ε of the ferrite material is a key indicator for the miniaturization design of the circulator / isolator. The larger the dielectric constant of the material, the smaller the size of the circulator / isolator. [0003] Currently disclosed high dielectric constant garnet ferrite material literatur...

Claims

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Application Information

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IPC IPC(8): C04B35/40C04B35/622C04B35/626C04B35/634H01F1/34H01F41/02
CPCC04B35/2633C04B35/2641C04B35/622C04B35/62615C04B35/62695C04B35/63416H01F1/346H01F41/02C04B2235/3225C04B2235/3224C04B2235/3298C04B2235/442C04B2235/3239C04B2235/3244C04B2235/3293C04B2235/3217C04B2235/96
Inventor 马志强李小靖徐翔李俊蓉
Owner BEIJING INST OF RADIO MEASUREMENT
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