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Method for preparing high-performance manganese-zinc ferrite material

A ferrite material, high-performance manganese-zinc technology, applied in the field of manganese-zinc ferrite materials with an initial magnetic permeability of R13K prepared by carbonate co-precipitation method, can solve the problem of high cost and difficulty in large-scale industrial promotion Problems, to achieve high yield, good promotion and use value, and reduce costs

Inactive Publication Date: 2008-04-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses high-purity metals or compounds as raw materials, which is costly and difficult to promote on a large scale. This is the fundamental reason why the ceramic method still occupies an absolute dominant position in the market so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1 Accurately weigh 1000g of manganese-zinc ferrite grinding waste, add it to 917mL of industrial concentrated sulfuric acid, and leaching at a constant temperature of 90°C for 1.5h, add a reducing agent to the leaching solution, the reducing agent is H 2 S or Na 2 SO 3 , under the conditions of a temperature of 45°C and a stirring speed of 300 rpm, after reacting for 3 hours, filter while hot. After adjusting the formula, the filtrate was added to the co-precipitation bottom liquid. The co-precipitation bottom liquid was composed of ammonium bicarbonate and ammonia water. NH 4 HCO 3 It is 1.2 times the theoretical amount, and the amount of liquid ammonia is [CO 3 2- ] / [NH 3 ]=2.8-4.8, obtain coprecipitation powder 1054.2g. Co-precipitated powder is placed in a muffle furnace and heated to 650°C for 6 hours, then taken out, crushed, granulated, and shaped, then put into an atmosphere sintering furnace, heated to 1300°C for 10 hours under the protection of n...

Embodiment 2

[0015] Example 2 Accurately weigh 400g of crushed powder of manganese-zinc-ferrite waste devices, add to 611mL of industrial concentrated sulfuric acid, and leaching at 100°C for 6.5h at a constant temperature. The treatment of the reduction and co-precipitation process was the same as in Example 1, and 457.9 g of co-precipitation powder was obtained. Co-precipitated powder is placed in a muffle furnace and heated to 950°C for 3 hours, then taken out, crushed, granulated and shaped, then put into an atmosphere sintering furnace, heated to 1450°C for 18 hours under the protection of nitrogen, and then slowly cooled to room temperature , to obtain R13K product, its initial permeability μ i =13190 high performance manganese zinc ferrite.

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PUM

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Abstract

The invention relates to a preparation method of high-performance manganese zinc ferrite. The invention takes manganese zinc ferrite waste as raw materials and adopts a carbonate co-precipitation method to prepare the manganese zinc ferrite with R13K of initial magnetic conductivity. After the manganese zinc ferrites waste is strengthened and leached, the leaching solution is deoxidized and taken together with the carbonate or the lye as precipitating agent to carry on the co-precipitation to obtain the manganese galvanized iron compound powder. After pre-burning, smashing, pelleting, formation and atmosphere sintering, the co-precipitation powder is made into the manganese zinc ferrite with R13K of the initial magnetic conductivity. The invention has the advantages of simple technique, good yield and excellent performance. Moreover, the equipment of the ceramic technique does not require adjusting, and the invention has good value of promotion and use.

Description

Technical field: [0001] The invention relates to a method for preparing a high-performance manganese-zinc ferrite material. Specifically, manganese-zinc-ferrite waste is used as a raw material, and manganese-zinc-ferrite with an initial magnetic permeability of R13K is prepared by a carbonate co-precipitation method body material method. Background technique: [0002] With the development of information industries such as communications and computer networks, the preparation of high-performance manganese-zinc ferrite has become a frontier topic in the research of magnetic materials. Retrieving domestic and foreign literature shows that most of the research focus on the preparation of high-performance manganese-zinc ferrite is concentrated on the ceramic process. That is: with high-purity Fe 2 o 3 , Mn 3 o 4 and ZnO as raw materials, through batching, primary ball milling, primary granulation and pre-calcination to obtain manganese-zinc ferrite powder, and then through s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 彭长宏唐谟堂黄虹李景芬
Owner CENT SOUTH UNIV