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High-impedance broadband soft magnetic ferrite material, magnet ring and preparation process thereof

A soft magnetic ferrite and preparation technology, which is applied in the direction of inorganic material magnetism, inductor/transformer/magnet manufacturing, transformer/inductor core, etc., can solve the problems of high price, unreachable performance, low impedance in low frequency band, etc. , to reduce costs

Active Publication Date: 2011-02-09
SZECHWAN DEYANG POYEE MAGNETIC MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the company only exports products, and the technology is kept secret to the outside world. The import price in my country exceeds RMB 60,000 per ton, which is expensive. Although many domestic companies are independently developing this material, the performance has not yet reached the level of Japan's TDK. The impedance of the low frequency band is too low, and the impedance of 10MHz is always less than 100Ω, which greatly limits the application

Method used

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  • High-impedance broadband soft magnetic ferrite material, magnet ring and preparation process thereof
  • High-impedance broadband soft magnetic ferrite material, magnet ring and preparation process thereof

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Embodiment Construction

[0023] According to the following weight ratio ingredients

[0024]

[0025] 2. Ball milling and pre-burning magnetic powder

[0026] The raw materials of the above example are sent into a ball mill tank, mixed and ball milled, the process conditions are controlled by weight ratio steel ball: raw material: deionized water=3:1:1, the ball milling time is 5 to 6 hours, and the material is dried after discharge.

[0027] The powder is pre-fired at a temperature of about 1000 ° C for 4 to 5 hours.

[0028] Put the pre-burned powder into the ball mill tank again for ball milling, the process conditions are controlled according to the weight ratio of steel ball: raw material: deionized water = 3:1:0.7-0.9, the ball milling time is 19-20 hours, and the material is dried after discharge.

[0029] 3. Sintered magnetic ring

[0030] The powder is made into an inductor magnetic ring according to the traditional ceramic process, and it is sintered in the air for 5-6 hours, a...

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Abstract

The invention relates to a high-impedance broadband soft magnetic ferrite material, a magnet ring and a preparation process thereof. The high-impedance broadband soft magnetic ferrite material is prepared from the following raw materials in weight ratio: 63-65 of Fe2O3, 8-10 of NiO, 21.5-23 of ZnO, 3-5 of CuO and 0.5-1.0 of Co2O3. The technical characteristics of the high-impedance broadband inductor magnet ring made of the material and the process thereof reach or exceed the level of a similar product of the Japanese TDK Corporation. Test results show that the impedance at low frequency end (10 MHz) is not less than 100 ohm and is equivalent to the product of the Japanese TDK Corporation; the impedance at high frequency end (500 MHz) exceeds 300 ohm, and the impedance is greater than that of the product of the Japanese TDK Corporation starting from 150 MHz.

Description

technical field [0001] The invention relates to a soft ferrite material, in particular to a high-impedance broadband soft ferrite material, a magnetic ring and a preparation process thereof. Background technique [0002] Soft ferrite materials are widely used in electronics, communications and other fields due to their superior electromagnetic properties. According to the application of the device, the formula and preparation process of the soft ferrite material can be adjusted to meet the special performance requirements of the device. For example, network filters and transformers require magnetic ring materials with a wide frequency range and large impedance. At present, the soft magnetic ferrite materials produced by Japan TDK Company are recognized by the world as having the best performance. Impedance ≥ 100Ω, high frequency end (500MHz) impedance nearly 300Ω. However, the company only exports products, and the technology is kept secret to the outside world. The import ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/34H01F27/24C04B35/622C04B35/26H01F41/02
Inventor 张志宏李想
Owner SZECHWAN DEYANG POYEE MAGNETIC MATERIAL
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