Yttrium iron garnet ferrite material and preparation method thereof

A technology of yttrium iron garnet and ferrite materials, which is applied in the field of yttrium iron garnet ferrite materials and its preparation, can solve the problems of limiting the high power performance of ferrite materials, coarse sintered crystal grains, and poor uniformity. Achieve the effect of excellent high power bearing capacity, fine and uniform grain, and excellent grain size

Pending Publication Date: 2020-04-10
南京大成材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main preparation method of yttrium iron garnet ferrite used in industrial production is the oxide method, using solid oxide as raw material, and ferrite is prepared through basic steps such as batching, ball milling, drying, molding, and sintering. Coarse grains and poor uniformity limit the high power performance of ferrite materials

Method used

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  • Yttrium iron garnet ferrite material and preparation method thereof
  • Yttrium iron garnet ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of yttrium iron garnet ferrite material, comprising the following steps:

[0026] (1) Mixing: raw materials are weighed in the following parts by weight: Y 2 o 3 45 parts, Gd 2 o 3 1.5 parts, CaO1.5 parts, CuO1.0 parts, Fe 2 o 3 48.5 copies, In 2 o 3 1.5 parts, V 2 o 5 0.3 parts, Al 2 o 3 1.7 servings. Y 2 0 3 , Fe 2 0 3 The average particle size of the raw materials is 2.2 μm; the average particle size of the other raw materials is 0.6 μm; the above raw materials are added to the ball mill for wet ball milling, the mass ratio of raw materials, balls and water is 1:7:1.4, and dried after ball milling , cross 30 mesh sieves.

[0027](2) Pre-burning: the above sieved powder is heated up to 650°C at a heating rate of 8°C / min, then to 1050°C at a heating rate of 100°C / min, and then cooled at a cooling rate of 80°C / min to room temperature;

[0028] (3) Secondary ball milling: Pass the pre-fired powder through a 30-mesh sieve, and then a...

Embodiment 2

[0032] A preparation method of yttrium iron garnet ferrite material, comprising the following steps:

[0033] (1) Mixing: raw materials are weighed in the following parts by weight: Y 2 o 3 42.5 parts, Gd 2 o 3 2.5 parts, CaO1.8 parts, CuO1.5 parts, Fe 2 o 3 49.3 copies, In 2 o 3 1.7 parts, V 2 o 5 0.2 parts, Al 2 o 3 0.5 servings. Y 2 0 3 , Fe 2 0 3 The average particle size of the raw materials is 2.0 μm; the average particle size of the rest of the raw materials is 0.5 μm; the above raw materials are added to the ball mill for wet ball milling, the mass ratio of raw materials, balls and water is 1:6:1.5, and dried after ball milling , Cross 30 mesh sieves.

[0034] (2) Pre-burning: the above sieved powder is heated up to 700°C at a heating rate of 10°C / min, then to 1100°C at a heating rate of 80°C / min, and then cooled at a cooling rate of 100°C / min to room temperature;

[0035] (3) Secondary ball milling: pass the pre-fired powder through a 30-mesh sieve, ...

Embodiment 3

[0039] A preparation method of yttrium iron garnet ferrite material, comprising the following steps:

[0040] (1) Mixing: raw materials are weighed in the following parts by weight: Y 2 o 3 45.5 parts, Gd 2 o 3 0.5 parts, 1.0 parts of CaO, 0.5 parts of CuO, Fe 2 o 3 50.5 parts, In 2 o 3 1.0 parts, V 2 o 5 0.5 parts, Al 2 o 3 0.5 servings. Y 2 0 3 , Fe 2 0 3 The average particle size of the raw materials is 2.1 μm; the average particle size of the remaining raw materials is 0.7 μm; the above raw materials are added to the ball mill for wet ball milling, the mass ratio of raw materials, balls and water is 1:7:1.3, and dried after ball milling , Cross 30 mesh sieves.

[0041] (2) Pre-burning: the above sieved powder is heated up to 650°C at a heating rate of 5°C / min, then to 1050°C at a heating rate of 100°C / min, and then cooled at a cooling rate of 100°C / min to room temperature;

[0042] (3) Secondary ball milling: Pass the pre-burned powder through a 30-mesh s...

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PUM

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Abstract

An yttrium iron garnet ferrite material and a preparation method thereof are disclosed. The chemical formula of the material is Y<3-x-y-z>GdxCayCuzFe<5-a-b-c>InaVbAlcO12. The preparation method mainlyincludes mixing ball milling; pre-firing; secondary ball milling; granulation molding; and sintering. The main advantages are that the prepared ferrite material has fine and uniform grains, which helps to obtain a dense microstructure, thereby improving the high-power endurance of the material; the material is suitable for the use of various high-power isolators in communication base stations; through Cu<2+> doping, the sintering temperature of the material is reduced properly, which is beneficial to material mass production.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a yttrium iron garnet ferrite material and a preparation method thereof. Background technique [0002] Ferrite is a metal oxide with ferromagnetism. In terms of electrical properties, the resistivity of ferrite is much larger than that of metal and alloy magnetic materials, and it also has higher dielectric properties. There are many varieties of gyromagnetic ferrite materials, which are classified according to the composition and crystal structure of the material, including garnet type, spinel type and magnetoplumbite type (hexagonal crystal system). The yttrium iron garnet material is mainly used to prepare isolators for the communication frequency band, and the yttrium iron garnet material is required to have the characteristics of small insertion loss and good consistency. [0003] Spun ferrite materials and devices are widely used in the fields of satellite commu...

Claims

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Application Information

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IPC IPC(8): C04B35/40C04B35/622C04B35/64H01F41/02
CPCC04B35/2675C04B35/622C04B35/64H01F41/02C04B2235/3225C04B2235/3224C04B2235/3208C04B2235/3281C04B2235/3286C04B2235/3217C04B2235/3239C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/5436C04B2235/5445
Inventor 俞小娟罗建华
Owner 南京大成材料科技有限公司
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