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Microwave ferrite magnetic sheet, preparation method and applications thereof

A ferrite magnetic and microwave technology, applied in the field of ferrite, can solve the problems of meeting the size requirements of 5G base station circulators/isolators, and achieve the effects of reducing line width, reducing insertion loss, and increasing content

Inactive Publication Date: 2020-04-14
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, none of the above solutions can meet the size requirements of 5G base station circulators / isolators while ensuring the dielectric constant

Method used

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  • Microwave ferrite magnetic sheet, preparation method and applications thereof
  • Microwave ferrite magnetic sheet, preparation method and applications thereof
  • Microwave ferrite magnetic sheet, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] This embodiment prepares microwave ferrite magnetic sheet according to the following method:

[0073] 1. Weigh the raw materials according to the following weight ratio:

[0074]

[0075] 2. One ball mill

[0076] Mix the raw materials weighed in 1 into a stainless steel ball mill tank, add steel balls and deionized water according to the ratio of material: ball: water = 1:4.5:0.9 to carry out a wet ball mill, time: 18 hours.

[0077] 3. Drying

[0078] Pass the ball-milled material through a 100-mesh sieve, and dry it at 150°C for 15 hours to obtain a dry material.

[0079] 4. Pre-sintering

[0080] Pass the dried powder through a 30-mesh sieve, put it in a bowl and put it into a high-temperature electric furnace for pre-burning at a temperature of 1200°C and keep it warm for 10 hours.

[0081] 5. Second ball milling

[0082] The mixture after pre-burning is crushed, put into a stainless steel ball mill tank, and steel balls and deionized water are added accord...

Embodiment 2

[0101] This embodiment prepares microwave ferrite magnetic sheet according to the following method:

[0102] 1. Weigh the raw materials according to the following weight ratio:

[0103]

[0104] 2. One ball mill

[0105] Mix the raw materials weighed in 1 into a stainless steel ball mill tank, add steel balls and deionized water according to the ratio of material: ball: water = 1:4.5:0.9 to carry out a wet ball mill, time: 18 hours.

[0106] 3. Drying

[0107] Pass the ball-milled material through a 100-mesh sieve, and dry it at 150°C for 15 hours to obtain a dry material.

[0108] 4. Pre-sintering

[0109] Pass the dried powder through a 30-mesh sieve, put it in a bowl and put it into a high-temperature electric furnace for pre-burning at a temperature of 1200°C and keep it warm for 10 hours.

[0110] 5. Second ball milling

[0111] The mixture after pre-burning is crushed, put into a stainless steel ball mill tank, and steel balls and deionized water are added accord...

Embodiment 3

[0130] This embodiment prepares microwave ferrite magnetic sheet according to the following method:

[0131] 1. Weigh the raw materials according to the following weight ratio:

[0132]

[0133]

[0134] 2. One ball mill

[0135] Mix the raw materials weighed in 1 into a stainless steel ball mill tank, add steel balls and deionized water according to the ratio of material: ball: water = 1:4.5:0.9 to carry out a wet ball mill, time: 18 hours.

[0136] 3. Drying

[0137] Pass the ball-milled material through a 100-mesh sieve, and dry it at 150°C for 15 hours to obtain a dry material.

[0138] 4. Pre-sintering

[0139] Pass the dried powder through a 30-mesh sieve, put it in a bowl and put it into a high-temperature electric furnace for pre-burning at a temperature of 1200°C and keep it warm for 10 hours.

[0140] 5. Second ball milling

[0141] The mixture after pre-burning is crushed, put into a stainless steel ball mill tank, and steel balls and deionized water are ...

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Abstract

The invention provides a microwave ferrite magnetic sheet, a preparation method and applications thereof. The raw materials of the magnetic sheet comprise a main raw material and an auxiliary raw material, wherein the main raw material comprises an oxide of a Fe element and an oxide of a Y element, and the auxiliary raw material comprises Ca element, Sn element, Mn element and In element. The preparation method comprises the following steps: 1) mixing the raw materials according to the formula ratio, and carrying out first crushing to obtain a first crushing material; 2) pre-sintering the first crushing material to obtain a pre-sintered material; 3) carrying out second crushing on the pre-sintered material to obtain a second crushing material; and (4) granulating and molding the second crushing material, and sintering to obtain the microwave ferrite magnetic sheet. According to the microwave ferrite magnetic sheet provided by the invention, the saturation magnetization intensity of thematerial is improved by adjusting the formula, so that the size of an isolator is reduced, and the high saturation magnetization intensity can increase the bandwidth of a device.

Description

technical field [0001] The invention belongs to the technical field of ferrite, and relates to a microwave ferrite magnetic sheet and its preparation method and application. Background technique [0002] Since the number of isolators used in 5G base stations has increased significantly compared with 4G, the number of isolators to be installed on a substrate has increased significantly, so the size of the isolators is required to be reduced, and the isolators are required to have greater bandwidth. [0003] To reduce the size of the isolator, the dielectric constant of the microwave ferrite material can be increased, or the saturation magnetization of the microwave ferrite material can be increased. However, it is difficult to increase the dielectric constant of the material under the premise that the main material system remains unchanged. very big. [0004] The official commercialization and pilot operation of 5G mobile communication will bring huge market demand for high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/645
CPCC04B35/2633C04B35/2641C04B35/6455C04B2235/3208C04B2235/3225C04B2235/3262C04B2235/3286C04B2235/3293
Inventor 关旺吕飞雨朱权
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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