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A kind of preparation method of manganese ferrite nanopowder

A nano-powder, manganese ferrite technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of long reaction time, complicated oxide preparation process, etc., achieve fast heating speed, shorten microwave Response time, small coercive force effect

Active Publication Date: 2016-05-11
江苏尚善环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the sol-gel method, precipitation method, microemulsion method, low-temperature solid-phase chemical method and other methods will involve the calcination process when preparing manganese ferrite, which complicates the preparation process of oxides.
The reaction temperature of the powder prepared by the hydrothermal synthesis method is low, and the particle size and shape of the powder are controllable. At the same time, the powder prepared by the hydrothermal method has the advantages of good crystallinity and uniform chemical composition. longer reaction time

Method used

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  • A kind of preparation method of manganese ferrite nanopowder
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  • A kind of preparation method of manganese ferrite nanopowder

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preparation example Construction

[0024] The present invention provides a kind of preparation method of manganese ferrite nanopowder, specifically implement according to the following steps:

[0025] Step 1. Press Mn 2+ with Fe 3+ The molar ratio is 1:1.9-1:2.1, MnCl 2 4H 2 O and Fe(NO 3 ) 3 9H 2 O is dissolved in deionized water to configure a mixed solution, wherein, in the mixed solution, Mn 2+ The concentration is 0.12mol / L;

[0026] Step 2, adding surface modifier sodium dodecylbenzenesulfonate in the above solution, wherein, sodium dodecylbenzenesulfonate and MnCl 2 4H 2 O and Fe(NO 3 ) 3 9H 2 The mass ratio of the total amount of O is 1:100-1:10, dissolved and mixed evenly;

[0027] Step 3, slowly add ammonia water with a concentration of 10wt% to the mixed solution obtained in step 2, adjust the pH value of the microwave hydrothermal reaction system to 9-13; then add the solution with adjusted pH value into the microwave digestion tank, seal it Put it in a microwave digestion apparatus, ra...

Embodiment 1

[0055] A preparation method of manganese ferrite nano-powder, specifically implemented according to the following steps:

[0056] Step 1, weigh 1.1875gMnCl 2 4H 2 O, 4.8480gFe(NO 3 ) 3 9H 2 O is placed in the same beaker, and the two salts weighed are dissolved with deionized water, so that the total amount of the solution is 50ml.

[0057] Step 2. Weigh 0.2414g of sodium dodecylbenzenesulfonate and dissolve it in the solution prepared in step 1.

[0058] Step 3, under the condition of rapid stirring, drip ammonia water with a concentration of 10 wt% into the solution obtained in step 2, and use the ammonia water with this concentration to adjust its pH value to 12 to obtain a suspension.

[0059] Step 4. Put the suspension obtained in step 3 into the reaction vessel of the microwave digestion apparatus - a microwave digestion tank, seal it and put it into the microwave digestion apparatus, set the microwave hydrothermal reaction temperature to 130°C, and the reaction tim...

Embodiment 2

[0062] A preparation method of manganese ferrite nano-powder, specifically implemented according to the following steps:

[0063] Step 1, weigh 1.1875gMnCl 2 4H 2 O, 4.6056gFe(NO 3 ) 3 9H 2 O is placed in the same beaker, and the two salts weighed are dissolved with deionized water, so that the total amount of the solution is 50ml.

[0064] Step 2. Weigh 0.057931 g of sodium dodecylbenzenesulfonate and dissolve it in the solution prepared in step 1.

[0065] Step 3, under the condition of rapid stirring, drip ammonia water with a concentration of 10 wt% into the solution obtained in step 2, and use the ammonia water with this concentration to adjust its pH to 9 to obtain a suspension.

[0066] Step 4. Put the suspension obtained in step 3 into the reaction vessel of the microwave digestion apparatus - a microwave digestion tank, seal it and put it into the microwave digestion apparatus, set the microwave hydrothermal reaction temperature to 100°C, and the reaction time to...

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Abstract

The invention discloses a preparation method of manganese ferrite nano-powder. The method specifically comprises the following steps: dissolving MnCl2.4H2O and Fe(NO3)3.9H2O into deionized water to prepare a mixed solution; adding a surface modifier sodium dodecyl benzene sulfonate to the mixed solution, dissolving and mixing evenly; adjusting the pH value of a microwave hydrothermal reaction system; adding the solution with adjusted pH value to a microwave digestion tank; sealing, putting into a microwave digestion instrument, and carrying out microwave hydrothermal reaction; after reaction is ended, taking out the solution, filtering, washing and drying sediment with distilled water and absolute ethyl alcohol for many times, so as to obtain a microwave hydrothermal product, namely the manganese ferrite nano-powder. According to the preparation method, manganese ferrite is synthesized by adopting the microwave hydrothermal method, so that the microwave reaction time is shortened; the calcining process is avoided; the experimental procedure is simplified; and the manganese ferrite with good crystallinity, relatively high saturation magnetization strength, and small coercive force is finally obtained.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a preparation method of manganese ferrite nanometer powder. Background technique [0002] Magnetic materials are one of the key materials to promote social development, and are an important pillar and foundation of the national economy and national defense industry. They are widely used in the field of electronic information components and have broad application prospects in daily life, national defense, and military affairs. [0003] The rapid development of nanotechnology provides a good opportunity for better application of magnetic materials. Nano-manganese ferrite is a high-quality soft magnetic material with high saturation magnetization, high initial permeability, and low coercive force. It is widely used in various electronic information, electromagnetic shielding, biomedicine, nuclear magnetic resonance, and water treatment. And ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00B82Y30/00
Inventor 刘桂香罗庆平徐光亮白玉洁孟平原李胜男赖振宇
Owner 江苏尚善环保科技有限公司