Synthesis method of Mn-Zn ferrite crystal

A manganese-zinc ferrite and synthesis method technology, applied in the field of synthesis of high-performance manganese-zinc ferrite crystals, can solve problems such as difficult large-scale production, harsh synthesis conditions, uneven mixing, etc., and overcome step-by-step precipitation Effects of problems, ease of control, and cheap raw materials

Inactive Publication Date: 2013-05-01
广西冶金研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The precipitation / co-precipitation method has the advantages of mild operating conditions, wide source of raw materials, and low price. However, due to the difference in solubility product between different metal precipitates, there will be a step-by-step precipitation problem, resulting in the precipitation between the precipitates formed by different metals. There is also a degree of uneven mixing
The biggest disadvantage of the hydrothermal method and the sol-gel method is that the synthesis conditions are harsh and it is not easy to achieve large-scale production

Method used

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  • Synthesis method of Mn-Zn ferrite crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Take zinc sulfate (ZnSO 4 ·7H 2 O) powder 2.5mol (718.9g), manganese acetate [Mn(CH 3 COO) 2 4H 2 O] powder 7.5mol (1837.8g), ferrous nitrate [Fe(NO 3 ) 2 ·6H 2 O] powder 20mol (5759.0g), sodium carbonate (Na 2 CO 3 10H 2 O) Powder 34.5 mol (9871.8 g), polyethylene glycol-400 (363.8 g). Add sodium carbonate powder into an enamel container, then add polyethylene glycol-400 and mix evenly for later use, then add to the sodium carbonate powder mixed with polyethylene glycol-400 under stirring at room temperature The above-mentioned zinc salt powder, manganese salt powder, and iron salt powder are added and mixed evenly, then moved into the grinding equipment for full grinding for 40 minutes, left at room temperature for 1.5 hours, washed the reaction mixture with water to the filtrate with 0.5mol L -1 BaCl 2 The solution does not detect SO 4 2- filter under reduced pressure. Dry the filter cake at 120°C for 3-4 hours, grind the dried filter cake into powder, ...

Embodiment 2

[0047] Take zinc chloride (ZnCl 2 ) powder 2.5mol (340.73g), manganese sulfate (MnSO 4 4H 2 O) powder 7.5mol (1673.0g), ferrous chloride (FeCl 2 4H 2 O) powder 20mol (3976.2g), sodium carbonate (Na 2 CO 3 10H 2 O) Powder 34.5 mol (9871.8 g), OP-10 (317.2 g). Add sodium carbonate powder into an enamel container, then add OP-10 and grind and mix evenly for later use, then add the above-mentioned zinc salt to the sodium carbonate powder ground and mixed with OP-10 under stirring at room temperature and normal pressure Powder, manganese salt powder, iron salt powder, after adding and mixing evenly, move it into the grinding equipment and grind it fully for 50min, let it stand at room temperature for 1.5h, wash the reaction mixture with water to the filtrate with 0.5mol L -1 BaCl 2 The solution does not detect SO 4 2-filter under reduced pressure. Dry the filter cake at 120°C for 3-4 hours, grind the dried filter cake into powder, and then place it in a high-temperature ...

Embodiment 3

[0049] Take zinc nitrate [Zn(NO 3 ) 2 ·6H 2 O] powder 2.5mol (743.7g), manganese nitrate [Mn(NO 3 ) 2 ·6H 2 O] powder 7.5mol (2152.8g), ferrous sulfate (FeSO 4 ·7H 2 O) powder 20mol (5560.2g), ammonium carbonate [(NH 4 ) 2 CO 3 ] Powder 34.5mol (3315.1g), Tween-80 (118g), triethanolamine hydrochloride (118g). Add ammonium carbonate powder into an enamel container, then add half of Tween-80 and half of triethanolamine hydrochloride and mix well, set aside. In another enamel container, fully mix zinc nitrate powder, manganese nitrate powder, and ferrous sulfate powder evenly, then add the other half of Tween-80 and the other half of triethanolamine hydrochloride, mix evenly, and set aside. Then at room temperature and normal pressure, add the above-mentioned mixture of zinc salt powder, manganese salt powder, and iron salt powder to the ammonium carbonate powder under stirring. Set aside for 2h, wash the reaction mixture with water to the filtrate with 0.5mol L -1 Ba...

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Abstract

The invention discloses a synthesis method of Mn-Zn ferrite crystal which adopts room temperature solid state chemical reaction indirect synthesis method. The method comprises the following specific steps: using zinc salt powder, manganese salt powder, iron salt powder and carbonate powder as raw materials, adding template, mixing at room temperature and normal pressure and grinding, standing reaction mixture, then washing the reaction mixture with water to remove the soluble inorganic salt by-product, filtrating, drying the filter cake to obtain the precursor of Mn-Zn ferrite crystal, and calcining the precursor at 350-1,100 DEG C under the normal pressure to obtain cubic Mn-Zn ferrite crystal powder with the space group of Fd-3m (227). Compared with the prior art, the method of the invention has the advantage that no solvent is needed, reaction conditions are mild and controllable, the technology is simple, the raw materials have cheap price and wide sources, etc. The prepared Mn-Znferrite crystal has high specific saturation magnetization and low residual magnetism, thus being a high-performance soft magnetic material.

Description

technical field [0001] The invention relates to a manganese-zinc ferrite crystal material, in particular to a synthesis method of a high-performance manganese-zinc ferrite crystal. Background technique [0002] Manganese zinc ferrite crystal, Mn x Zn 1-x Fe 2 o 4 , are an important class of magnetic materials that are widely used in various electronic and magnetic applications such as transformers, choke coils, noise filters, and recording heads due to their high magnetic permeability and low magnetic loss . They are also candidates for recording media with high density and low noise level. Their properties mainly depend on their microstructural features, such as sintered density, crystallite size, particle size distribution, crystal form and the amount of introduced additives. To this end, people have done a lot of work on the development of manganese zinc ferrite powder, and developed a variety of synthesis methods, including high temperature solid state reaction met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/626C04B35/26
Inventor 黄进文吴文伟刘晨苏鹏廖森陈克勤黄瀚樊艳金吴学航
Owner 广西冶金研究院有限公司
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