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Narrow-linewidth and low-loss gyromagnetic ferrite material and preparation method thereof

The invention relates to a technology of spinning ferrite and low loss, which is applied in the field of narrow linewidth and low loss spinning ferrite material and its preparation field, and can solve the problem of limiting the mass production and preparation of narrow linewidth spinning ferrite material, high cost of raw and auxiliary materials, high cost of raw and auxiliary materials, etc. Complex composition and other problems, to achieve the effect of good mechanical properties, less defects, uniform and complete grains

Inactive Publication Date: 2015-04-08
TDG HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For 4G network requirements, the method of microwave gyromagnetic ferrite prepared by the above patents is either complicated in composition and high in cost of raw and auxiliary materials, or has a large line width and high loss, which limits the batch size of narrow line width gyromagnetic ferrite materials. production preparation

Method used

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  • Narrow-linewidth and low-loss gyromagnetic ferrite material and preparation method thereof
  • Narrow-linewidth and low-loss gyromagnetic ferrite material and preparation method thereof
  • Narrow-linewidth and low-loss gyromagnetic ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A narrow linewidth and low loss gyromagnetic ferrite material, its main phase is garnet, and its chemical formula is Y 3-x Ca x Fe 5-x-3y Li y Sn 2y+x O 12 , where: x=0.06; y=0.008. The preparation method of this gyromagnetic ferrite material is as follows:

[0040] According to the chemical formula Y 3-x Ca x Fe 5-x-3y Li y Sn 2y+x O 12 , where: x=0.06, y=0.008, calculate and weigh the required raw materials. The raw material used is Fe 2 O 3 (purity >99.2%), Y 2 O 3 (purity >99.5%), CaCO 3 (analytical grade), LiCO 3 (analytical grade), SnO 2 (analytically pure). Fe in the raw material formula 2 O 3 Compared with the calculated results, the dosage of 2-3 wt% was reduced.

[0041] Load the weighed raw materials into the hopper of the vibrating mill, and add Φ15 mm chromium steel balls in the ratio of material: ball = 1:5 for dry vibrating and mixing for 0.5 hours.

[0042] The mixed material was put into a zirconia crucible, and then put into a bo...

Embodiment 2

[0054] A narrow linewidth and low loss gyromagnetic ferrite material, its main phase is garnet, and its chemical formula is Y 3-x Ca x Fe 5-x-3y Li y Sn 2y+x O 12 , where: x=0.08; y=0.01. The preparation method of this gyromagnetic ferrite material is as follows:

[0055] According to the chemical formula Y 3-x Ca x Fe 5-x-3y Li y Sn 2y+x O 12 , where: x=0.08, y=0.01, calculate and weigh the required raw materials. The raw material used is Fe 2 O 3 (purity >99.2%), Y 2 O 3 (purity >99.5%), CaCO 3 (analytical grade), LiCO 3 (analytical grade), SnO 2 (analytically pure). Fe in the raw material formula 2 O 3 Compared with the calculated results, the dosage of 2-3 wt% was reduced.

[0056] Load the weighed raw materials into the hopper of the vibrating mill, and add Φ15 mm chromium steel balls in the ratio of material: ball = 1:5 for dry vibrating and mixing for 0.5 hours.

[0057] The mixed material was put into a zirconia crucible, and then put into a box ...

Embodiment 3

[0069] A narrow linewidth and low loss gyromagnetic ferrite material, its main phase is garnet, and its chemical formula is Y 3-x Ca x Fe 5-x-3y Li y Sn 2y+x O 12 , where: x=0.1; y=0.006. The preparation method of this gyromagnetic ferrite material is as follows:

[0070] According to the chemical formula Y 3-x Ca x Fe 5-x-3y Li y Sn 2y+x O 12 , where: x=0.1, y=0.006, calculate and weigh the required raw materials. The raw material used is Fe 2 O 3 (purity >99.2%), Y 2 O 3 (purity >99.5%), CaCO 3 (analytical grade), LiCO 3 (analytical grade), SnO 2 (analytically pure). Fe in the raw material formula 2 O 3 Compared with the calculated results, the dosage of 2-3 wt% was reduced.

[0071] Load the weighed raw materials into the hopper of the vibrating mill, and add Φ15 mm chromium steel balls in the ratio of material: ball = 1:5 for dry vibrating and mixing for 0.5 hours.

[0072] The mixed material was put into a zirconia crucible, and then put into a box ...

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PUM

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Abstract

The invention relates to a narrow-linewidth and low-loss gyromagnetic ferrite material and a preparation method thereof. A main phase of the material is of a garnet structure; the chemical formula is as follows: Y3-xCaxFe5-x-3yLiySn2y+xO12, wherein x is larger than or equal to 0.01 and smaller than or equal to 0.3, and y is larger than or equal to 0.001 and smaller than or equal to 0.04. The preparation method of the narrow-linewidth and low-loss gyromagnetic ferrite material comprises the following processes: calculating and weighing raw materials according to the chemical formula, mixing, pre-burning, sanding and crushing, centrifugally spraying and prilling, pressing, molding, sintering, grinding, annealing and coating a silver layer. The material has the basic characteristics that the saturation magnetization Ms is 123.4kA / m-159.2kA / m, the gyromagnetic resonance line width deltaH is smaller than or equal to 1.2kA / m, the dielectric loss tgdeltae is smaller than or equal to 0.5*10 <-4>; the material is assembled in a 25.7*31.5*10 circulator; the performance is tested under 925MHz-960MHz; and the insertion loss is smaller than or equal to 0.16dB. The material is low in sintering temperature, has energy-saving and environmental protection effects; the diameter of grains is 7-18 microns; the grains are uniform and integral and are few in defects; and the narrow-linewidth and low-loss gyromagnetic ferrite material is applied to the field of microwave wireless communication.

Description

technical field [0001] The invention relates to a narrow line width and low loss gyromagnetic ferrite material and a preparation method thereof. The material is a magnetic material applied to microwave wireless communication. Background technique [0002] With the advancement of science and technology and the development of demand, the equipment market scale of the global mobile base station is constantly expanding, and the 4G commercial network is developing rapidly in the world. However, more than 80% of the gyromagnetic ferrite materials used in circulators and isolators in 4G networks require a narrow linewidth with a saturation magnetization Ms of 120kA / m~159.2kA / m (4πMs: 1600 Gs~2000 Gs). , Low loss gyromagnetic ferrite material. [0003] There have been some patent documents on gyromagnetic ferrite materials and preparation methods for microwave use in the early stage. CN 102976729 A discloses a narrow line width and high dielectric constant garnet microwave ferrite,...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 李银传潘晓东邵峰顾立波徐鑫
Owner TDG HLDG CO LTD
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