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Low-loss YIG material and preparation method thereof

A low-loss, material-structured technology, applied in the field of electronic ceramic materials, can solve the problems of high dielectric loss, high raw material cost, and large ferromagnetic resonance line width, and achieve the effect of reducing dielectric loss

Pending Publication Date: 2022-06-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of existing YIG ferrite materials such as large ferromagnetic resonance line width, high dielectric loss or small line width but high cost of raw materials, etc., and proposes a ferromagnetic resonance with small line width, low dielectric loss, Microwave ferrite material with high saturation magnetization, cheap and easy-to-obtain raw materials, simple and easy-to-replicate process and preparation method thereof

Method used

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  • Low-loss YIG material and preparation method thereof

Examples

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preparation example Construction

[0027] The embodiment provides a preparation method of low-loss YIG material, comprising the following steps:

[0028] (1) Step 1, the preparation of pre-sintered material:

[0029] (1.1) Using iron oxide, calcium oxide, yttrium oxide and tin oxide as raw materials, according to Y 2.7 Ca 0.3 Fe (4.7-x) Sn 0.3 O 12 , 0≤x≤0.325 ratio to weigh the raw material, and then put it in a nylon tank and use deionized water as a medium for one ball milling for 6-9 hours; preferably, the ball milling time of one ball milling in the step (1.1) is 6h.

[0030] (1.2) After drying and sieving the primary ball abrasive obtained in step 1.1, it is pre-fired at 1200° C. for 4-5 hours, and then cooled to room temperature with the furnace; preferably, the holding time is 4 hours.

[0031] (2) Step 2, secondary ball milling:

[0032] The pre-sintered material obtained in step 1 is placed in a nylon tank, and deionized water is added to carry out secondary ball milling for 6-8h, and drying aft...

Embodiment 1

[0045] The present embodiment provides a method for preparing a low-loss YIG material, comprising the following steps:

[0046] (1) Step 1, the preparation of pre-sintered material:

[0047] (1.1) Using iron oxide, calcium oxide, yttrium oxide and tin oxide as raw materials, according to Y 2.7 Ca 0.3 Fe (4.7-x) Sn 0.3 O 12 , the ratio of x=0 is weighed and the raw material is weighed, and then placed in a nylon tank with deionized water as the medium for one-time ball milling for 6-9h; the rotating speed is 260r / min;

[0048] (1.2) After drying and sieving the primary ball abrasive obtained in step 1.1, pre-fire at 1200°C for 4-5h, and then cool to room temperature with the furnace;

[0049] (2) Step 2, secondary ball milling:

[0050] The pre-sintered material obtained in step 1 is placed in a nylon tank, and deionized water is added to carry out secondary ball milling for 6-8h, the rotating speed is 260r / min, and drying is completed after the ball milling;

[0051] (3) ...

Embodiment 2

[0057] The difference between this example and Example 1 is that x=0.25 in step 1.1, and the remaining steps are the same as those of Example 1.

[0058] The properties of the YIG ferrite material prepared in Example 2 are:

[0059] Saturation magnetization 1874Gs, dielectric constant 16, dielectric loss tangent 8×10 -4 , the ferromagnetic resonance linewidth is 132Oe.

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Abstract

The invention provides a low-loss YIG material and a preparation method thereof, the structural formula of the material is Y2. 7Ca0. 3Fe (4.7-x) Sn0. 3O12, and x is greater than or equal to 0 and less than or equal to 0.325. The preparation method comprises the following steps: (1) preparation of a pre-sintered material; (2) secondary ball milling; and (3) forming and sintering: 1. Sn4 + ions are adopted to replace octahedral Fe < 3 + > so as to reduce the anisotropic constant and ferromagnetic resonance line width; meanwhile, a gradient is set for the iron deficiency amount, so that electron transfer between iron ions between an octahedron (a-site) and a tetrahedron (d-site) is reduced, and the dielectric loss of the material is reduced. The ferromagnetic resonance line width of the low-cost sample is 127Oe, the dielectric constant is 15.6, and the dielectric loss tangent is 4 * 10 <-4 >. According to the invention, octahedral Fe < 3 + > ions are replaced by Sn < 4 + > ions, the molecular magnetic moment of the ferrite material is increased, and the saturation magnetization of the obtained YIG sample is 1865Gs.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramic materials, and in particular relates to a YIG ferrite material with low dielectric loss, narrow ferromagnetic resonance line width and high saturation magnetization and a preparation method thereof. Background technique [0002] During the period of microwave ferrite, it was widely used in the fields of radar, microwave communication, artificial satellite and medical equipment. With the development of electronic systems towards miniaturization, multi-function, and high frequency, garnet-type microwave ferrite materials have narrow ferromagnetic resonance linewidths, low dielectric losses and small magnetic crystals. Excellent properties such as anisotropy currently occupy a dominant position in the application of microwave ferrite devices. [0003] Research reports about YIG ferrite materials: Patent application with publication number CN 102976740 A discloses a method for manufacturin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/63
CPCC04B35/2633C04B35/622C04B35/6303C04B2235/3208C04B2235/3225C04B2235/3272C04B2235/3293C04B2235/602C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/77
Inventor 刘颖力汪鑫殷齐声
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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