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Nano-crystal Mn-Zn ferrite magnetic material with high initial permeability and high thermal-magnetic sensitivity and preparation method of nano-crystal Mn-Zn ferrite magnetic material

A technology of manganese-zinc ferrite and magnetic material, applied in the field of ferrite material and its preparation, manganese-zinc ferrite material, can solve the problem of low reactivity of component oxides, high price of high-purity reactants, microscopic Uneven structure and other problems, to achieve the effect of easy and precise control of composition, easy mass production, and fine grain size

Inactive Publication Date: 2011-05-25
苏州天铭磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-purity reactant is expensive, and the solid phase is used as the precursor raw material. The reactivity of each component oxide is not high, and it is impossible to achieve a very uniform mixing, so the temperature required for sintering is high, and there is a high temperature. Disadvantages such as diffusion, composition segregation, and uneven microstructure

Method used

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  • Nano-crystal Mn-Zn ferrite magnetic material with high initial permeability and high thermal-magnetic sensitivity and preparation method of nano-crystal Mn-Zn ferrite magnetic material
  • Nano-crystal Mn-Zn ferrite magnetic material with high initial permeability and high thermal-magnetic sensitivity and preparation method of nano-crystal Mn-Zn ferrite magnetic material
  • Nano-crystal Mn-Zn ferrite magnetic material with high initial permeability and high thermal-magnetic sensitivity and preparation method of nano-crystal Mn-Zn ferrite magnetic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) FeSO with a purity of 99% was weighed respectively 4 , ZnSO 4 , MnSO 4 , the mass ratio of the three is 68:15:17, and the solution is configured;

[0036] (2) Add oxalic acid crystals to hydrazine to configure hydrazine oxalate (H 2 C 2 o 4 N 2 h 4 ·H 2 O);

[0037] (3) The main reactant mixture configured in step (1) is preheated to 80°C, and then a precipitating agent (H 2 C 2 o 4 N 2 h 4 ·H 2 O) solution;

[0038] (4) Quickly add the solution of step (3) into the aqueous solution of TW-80 dispersant, adjust the pH to 3.8, and stir vigorously; (5) Stop stirring, age for 1 hour, and cool to room temperature;

[0039] (6) filtering, washing (cleaning with ethanol and deionized water to remove impurities), vacuum drying;

[0040] (7) After being ground into powder, use a desktop electric tablet press to press the powder into a blank of a specific shape and size;

[0041] (8) Sintering: Sintering is carried out in a resistance furnace. The specific ...

Embodiment 2

[0043] (1) FeSO with a purity of 99% was weighed respectively 4 , ZnSO 4 , MnSO 4 , the mass ratio of the three is 72:8:20, and the solution is configured;

[0044] (2) Add oxalic acid crystals to hydrazine to configure hydrazine oxalate (H 2 C 2 o 4 N 2 h 4 ·H 2 O);

[0045] (3) The main reactant mixture configured in step (1) is preheated to 70°C, and then a precipitating agent (H 2 C 2 o 4 N 2 h 4 ·H 2 O) solution;

[0046] (4) Quickly add the solution of step (3) into the aqueous solution of TW-80 dispersant, adjust the pH to 4.5, and stir vigorously;

[0047](5) Stop stirring, age for 2h, and cool to room temperature;

[0048] (6) filtering, washing (cleaning with ethanol and deionized water to remove impurities), vacuum drying;

[0049] (7) After being ground into powder, use a desktop electric tablet press to press the powder into a blank of a specific shape and size;

[0050] (8) Sintering: Sintering is carried out in a resistance furnace. The speci...

Embodiment 3

[0052] (1) FeSO with a purity of 99% was weighed respectively 4 , ZnSO 4 , MnSO 4 , the mass ratio of the three is 70:12:18, and the solution is configured;

[0053] (2) Add oxalic acid crystals to hydrazine to configure hydrazine oxalate (H 2 C 2 o 4 N 2 h 4 ·H 2 O);

[0054] (3) The main reactant mixture configured in step (1) is preheated to 90°C, and then a precipitating agent (H 2 C 2 o 4 N 2 h 4 ·H 2 O) solution;

[0055] (4) Quickly add solution (3) to the aqueous solution of TW-80 dispersant, adjust the pH to 4.0, and stir vigorously;

[0056] (5) Stop stirring, age for 2h, and cool to room temperature;

[0057] (6) filtering, washing (cleaning with ethanol and deionized water to remove impurities), vacuum drying;

[0058] (7) After being ground into powder, use a desktop electric tablet press to press the powder into a blank of a specific shape and size;

[0059] (8) Sintering: Sintering is carried out in a resistance furnace. The specific heat tre...

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Abstract

The invention relates to a nano-crystal Mn-Zn ferrite magnetic material with high initial permeability and high thermal-magnetic sensitivity and a preparation method of the nano-crystal Mn-Zn ferrite magnetic material. When the Mn-Zn ferrite material is prepared, a raw material is composed of a main reactant and a precipitator, wherein the main reactant comprises the following components in percentage by weight: 68-72% of FeSO4, 8-15% of ZbSO4 and the balance of MnSO4; and the precipitator is hydrazine oxalate (H2C2O4N2H4.H2O). By using the preparation method, the initial permeability of the prepared Mn-Zn ferrite is up to 7500 at 25 DEG C, and the thermal-magnetic sensitivity of the prepared Mn-Zn ferrite is about 1 DEG C. the Mn-Zn ferrite prepared by the method can be widely applied to temperature detection and control systems such as household appliances, industrial machinery and the like.

Description

technical field [0001] The invention relates to a manganese-zinc ferrite material, in particular to a ferrite material with high initial magnetic permeability and high thermomagnetic sensitivity and a preparation method thereof, belonging to the technical field of oxide magnetic materials. technical background [0002] MnZn ferrite is a soft magnetic material widely used in communication, sensor, audio-visual equipment, switching power supply and magnetic head industry. Manganese-zinc ferrite has excellent temperature-sensing performance, and it can be made into a high-performance temperature sensor by utilizing its characteristic that its magnetic field will change drastically when the temperature changes slightly. The physical quantity of thermomagnetic sensitivity is commonly used to measure the temperature-sensing performance of soft magnetic materials, that is, the minimum temperature difference ΔT that the material can detect. At present, Japan, the United States and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/38C04B35/622
Inventor 魏瑞明戴建中邹仲鹤陆静军
Owner 苏州天铭磁业有限公司
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