Low-temperature high-permeability soft magnetic manganese-zinc ferrite material and preparation method thereof

A technology of manganese-zinc ferrite and high magnetic permeability, applied in the direction of magnetism of inorganic materials, can solve the problems of low magnetic permeability and limit the application range of soft magnetic manganese-zinc ferrite materials, and achieve the effect of optimizing the sintering method

Inactive Publication Date: 2016-07-20
上海康顺磁性元件厂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its magnetic permeability at low temperature is low, so the application ra

Method used

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  • Low-temperature high-permeability soft magnetic manganese-zinc ferrite material and preparation method thereof
  • Low-temperature high-permeability soft magnetic manganese-zinc ferrite material and preparation method thereof
  • Low-temperature high-permeability soft magnetic manganese-zinc ferrite material and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0036] A method for preparing a wide-temperature high-permeability soft-magnetic manganese-zinc ferrite material with high magnetic permeability and good low-temperature characteristics, the specific steps are as follows:

[0037] (1) Mixing: Accurately weigh 51-55% iron oxide (Fe 2 o 3 ), 15-20% of zinc oxide (ZnO), and the rest of manganese oxide (MnO), using a strong mixer to mix evenly, the total mixing time is 2h, and the particle size of the mixed powder is controlled at about 1.0-1.4μm.

[0038] (2) Pre-burning: Put the above mixed powder into the rotary kiln for pre-burning, the pre-fired temperature is 800-950°C, the pre-fired time is 40-70 minutes, the flow rate of the mixed powder is controlled at about 6kg / min, and the rotary kiln speed is 5-20 rev / min, make the red mixed powder react initially in solid state, and make the mixed powder change from red to black.

[0039] (3) Coarse crushing: Add the black mixture obtained by pre-calcination into a vibrating ball m...

Embodiment 2～12

[0048] Using the steps and preparation method of Example 1, different proportions of main components and addition amounts of trace additives (as shown in Table 1) were selected to prepare samples respectively.

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Abstract

The invention relates to a low-temperature high-permeability soft magnetic manganese-zinc ferrite material and a preparation method thereof. The material comprises a main ingredient and trace additives, wherein the main ingredient comprises the following components in molar content: 51%-55% of ferrite, 15%-20% of zinc oxide and the balance of manganese oxide; the trace additives are selected from 100-400ppm of nanoscale TiO2 and 200-800ppm of Bi2O3 and CaCO3; and the preparation technology comprises a material weighing step, a strong mixing step, a pre-sintering step, a breaking step, a sanding step, a pulping step, a secondary spray granulation step, a pressing step and a sintering step. Compared with the prior art, the sintering method is optimized through the nanoscale TiO2; and the soft magnetic manganese-zinc ferrite material of which the high permeability ui is greater than 11,000 (25 DEG C, 10mV) and the initial permeability ui is greater than 9,000 at -10 DEG C can be produced.

Description

technical field [0001] The invention belongs to the technical field of oxide magnetic materials, and in particular relates to a soft magnetic manganese zinc ferrite material with low temperature and high magnetic permeability and a preparation method thereof. Background technique [0002] Soft magnetic ferrite material is an important basic functional material in the national economy, widely used in various electronic products, mainly used in small signal processing devices in electronic technology, inductors in modern optical fiber communication and digital communication technology , filters, broadband transformers, and pulse transformers are all widely used. For example: communication equipment, home appliances, computers, automobiles, etc. [0003] In recent years, the development of electronic products in the direction of light, thin, short and small has put forward higher requirements for the performance of soft magnetic ferrite materials. Among them, high magnetic per...

Claims

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Application Information

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IPC IPC(8): H01F1/36C04B35/26C04B35/626C04B35/64
Inventor 陈俊黄国平
Owner 上海康顺磁性元件厂有限公司
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