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Low-loss spinel microwave ferrite material and preparation method thereof

A ferrite material and spinel technology, which is applied in the field of low-loss spinel microwave ferrite material and its preparation, can solve the problem of inability to prepare composite substrates by co-firing, increased material loss in the transition zone, and large material loss and other problems, to achieve the effect of wide optional range, small electromagnetic loss, and adjustable power capacity

Active Publication Date: 2022-07-05
SOUTHWEST INST OF APPLIED MAGNETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] That is to say, the sintering temperature of the NiZn spinel microwave ferrite material in the prior art is between 1180°C and 1220°C, which cannot be achieved with dielectric ceramics (sintering temperature of 1100°C to 1550°C) and garnet ferrite Co-fire the bulk material (sintering temperature 1300℃~1450℃) to prepare the composite substrate
The currently studied spinel sintered at a high temperature of 1260-1300 ° C, with Zn 2+ sn 4+ Combined substitution and regulation of 4πMs, the loss of the material is relatively large, and the dielectric loss is 5×10 -4 ~10×10 -4 , while Zn 2+ The concentration of ions diffusing into another material during the co-fired solid phase reaction is relatively large, resulting in increased loss of transition zone materials

Method used

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  • Low-loss spinel microwave ferrite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A low-loss spinel microwave ferrite material whose main phase structure is a spinel structure and whose chemical formula is Ni 1-a-d+e-g Zn a In b Dy c Co d Sn e Mn f Cu g Fe 2-b-c-2e-f-δ O 4 , where: a=0.1, b=0.2, c=0.02, d=0, e=0.1, f=0.04, g=0, δ=0.01.

[0036] Its preparation method is as follows:

[0037] 1. Formulated according to the compositional formula Ni 1-a-d+e-g Zn a In b Dy c Co d Sn e Mn f Cu g Fe 2-b-c-2e-f-δ O 4 , where: a=0.1, b=0.2, c=0.02, d=0, e=0.1, f=0.04, g=0, δ=0.01 for formula design;

[0038] 2. Weigh the materials, formula design results, calculate and weigh the various raw materials required, and the raw materials are analytically pure Fe 2 O 3 , NiO, ZnO, In 2 O 3 , SnO 2 , Dy 2 O 3 , MnCO 3 ;

[0039] 3. In the first ball milling, the weighed raw materials are mixed into the ball mill tank, and the balls and diluent are added. The diluent is deionized water, and the raw materials are wet mixed and ball mille...

Embodiment 2

[0048] A low-loss spinel microwave ferrite material whose main phase structure is a spinel structure and whose chemical formula is Ni 1-a-d+e-g Zn a In b Dy c Co d Sn e Mn f Cu g Fe 2-b-c-2e-f-δ O 4 , where: a=0, b=0.3, c=0.01, d=0.01, e=0, f=0.06, g=0, δ=0.06.

[0049] The preparation method is as follows:

[0050] 1. Formulated according to the compositional formula Ni 1-a-d+e-g Zn a In b Dy c Co d Sn e Mn f Cu g Fe 2-b-c-2e-f-δ O 4 , where: a=0, b=0.3, c=0.01, d=0.01, e=0, f=0.06, g=0, δ=0.06 for formula design;

[0051] 2. Weigh the materials, formula design results, calculate and weigh the various raw materials required, and the raw materials are analytically pure Fe 2 O 3 , NiO, In 2 O 3 , Co 2 O 3 , Dy 2 O 3 , MnCO 3 ;

[0052] 3. In the first ball milling, the weighed raw materials are mixed into the ball mill tank, and the balls and diluent are added, and the diluent is deionized water.

[0053] 4. Pre-sintering, drying the slurry, p...

Embodiment 3

[0061] A low-loss spinel microwave ferrite material whose main phase structure is a spinel structure and whose chemical formula is Ni 1-a-d+e-g Zn a In b Dy c Co d Sn e Mn f Cu g Fe 2-b-c-2e-f-δ O 4 , where: a=0.1, b=0.1, c=0.01, d=0.01, e=0, f=0.1, g=0.1, δ=0.1.

[0062] Its preparation method is as follows:

[0063] 1. Formulated according to the compositional formula Ni 1-a-d+e-g Zn a In b Dy c Co d Sn e Mn f Cu g Fe 2-b-c-2e-f-δ O 4 , where: a=0.1, b=0.1, c=0.01, d=0.01, e=0, f=0.1, g=0.1, δ=0.1 for formula design;

[0064] 2. Weigh the materials, formula design results, calculate and weigh the various raw materials required, and the raw materials are analytically pure Fe 2 O 3 , NiO, ZnO, In 2 O 3 , Co 2 O 3 , Dy 2 O 3 , CuO, MnCO 3 ;

[0065] 3. In the first ball milling, the weighed raw materials are mixed and put into the ball mill tank, and the balls and diluent are added.

[0066]4. Pre-sintering, drying the slurry, passing through ...

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Abstract

The invention discloses a low-loss spinel microwave ferrite material and a preparation method thereof, and belongs to the technical field of microwave ferrite materials, the chemical general formula of the low-loss spinel microwave ferrite material is Ni1-a-d + e-gZnaInbDycCodSneMnfCugFe2-b-c-2e-f-deltaO4, 0 < = a < = 0.2, 0 < = b < = 0.3, 0.005 < = c < = 0.02, 0 < = d < = 0.03, 0 < = e < = 0.1, 0 < = f < = 0.1, 0 < = g < = 0.2, delta is iron deficiency, 0 < = delta < = 0.1, 0 < = alpha < = 0.2, 0 < = alpha < = 0.2, 0 < = alpha < = 0.2, 0 < = alpha < = 0.2, 0 < = alpha < = 0.2, 0 < = alpha < = 0.2, 0 The sintering temperature of the spinel NiZn gyromagnetic material is adjustable in the range of 1100-1350 DEG C, the saturation magnetization Ms is in the range of 3000-4500 Gauss, the ferromagnetic resonance line width H is small in the range of 150-250 Oe, the dielectric loss is low, the spin wave line width Hk is adjustable in the range of 10-38 Oe, and the microwave ferrite material has the advantages of being wide in sintering temperature selectable range, small in electromagnetic loss, adjustable in power capacity and the like. The material can be used for compounding and co-firing with dielectric ceramic and garnet with low saturation magnetization to prepare a composite substrate, and the requirements of miniaturization and broadband of microwave devices, especially microstrip devices, are met.

Description

technical field [0001] The invention relates to the technical field of microwave ferrite materials, in particular to a low-loss spinel microwave ferrite material and a preparation method thereof. Background technique [0002] Spinel microwave ferrite material occupies a dominant position in the field of high-frequency microwave applications because of its low loss and strong power tolerance. Its electromagnetic properties directly determine the relevant performance of microwave devices in the X-millimeter wave band. [0003] With the development needs of miniaturization, light weight and broadband of microwave devices, the design based on a single ferrite material has tended to the extreme in miniaturization and broadbandization of devices, and it is impossible to further reduce the size of the device and expand the bandwidth, while the dielectric ceramic / Ferrite, spinel ferrite / garnet ferrite heterocomposite substrates meet the design requirements of miniaturization, light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/30C04B35/28C04B35/622H01F1/34H01F41/02
CPCC04B35/265C04B35/2608C04B35/622H01F1/34H01F41/02C04B2235/3284C04B2235/3286C04B2235/3279C04B2235/3275C04B2235/3224C04B2235/3293C04B2235/3262C04B2235/3281C04B2235/763
Inventor 袁红兰冯涛杨菲任仕晶肖永成
Owner SOUTHWEST INST OF APPLIED MAGNETICS
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