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Preparation method of nano magnesium ferrite

A technology of nanometer iron and magnesium acid, applied in nanotechnology, chemical instruments and methods, iron compounds, etc., can solve the problems of high energy consumption and complicated process, and achieve the effect of high purity, low cost and uniform shape

Inactive Publication Date: 2011-06-29
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

But the process is complex and energy-intensive

Method used

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  • Preparation method of nano magnesium ferrite
  • Preparation method of nano magnesium ferrite

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] A preparation method of nano-magnesium ferrite, the specific preparation steps are as follows:

[0021] A. Take 2.77g FeCl 3 ·6H 2 O, 1.99 g FeCl 2 4H 2 O was placed in a beaker; 100ml of NaOH solution was added to prepare magnetic Fe by chemical co-precipitation 3 o 4 Nanoparticles;

[0022] B, with the magnetic Fe prepared by step A 3 o 4 Put the beaker of nanoparticles into a muffle furnace and bake at 500°C for 3-4h to obtain nano-Fe 2 o 3 ;

[0023] C. Weigh 3g of magnesium powder and place it in another beaker, add 60ml of deionized water, and process it in an ultrasonic cleaner with a frequency of 90Hz for 5-8h to obtain a white turbid solution, and absorb the upper turbid solution into a clean beaker middle;

[0024] D. Set the temperature of the constant temperature drying oven to 60°C, put the beaker containing the turbid li...

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Abstract

The invention relates to a preparation method of nano magnesium ferrite, which comprises the following steps: mixing FeCl3.6H2O and FeCl2.4H2O in a mol ratio of 1:1, dropwisely adding a 2 mol / L NaOH solution, and preparing magnetic Fe3O4 nanoparticles by a chemical coprecipitation process; putting the magnetic Fe3O4 nanoparticles into a muffle furnace, and roasting at 500 DEG C for 3-4 hours to obtain nano Fe2O3; putting magnesium powder in a beaker, adding deionized water, and putting the beaker in an ultrasonic cleaner to treat for 5-8 hours, thereby obtaining a white turbid liquid; putting the supernatant of the turbid liquid in a clean beaker, drying in a drying box at constant temperature, and grinding the product to obtain Mg(OH)2; roasting the nano Mg(OH)2 in a muffle furnace at 350 DEG C for 3-4 hours, and roasting the Fe3O4 nanoparticles in a muffle furnace at 500 DEG C for 3-4 hours; respectively obtaining nano MgO and nano Fe2O3; and taking the nano Fe2O3 and the nano MgO, mixing the nano Fe2O3 and the nano MgO in a mol ratio of 1:1, adding deionized water, treating in an ultrasonic cleaner for 10-12 hours to obtain a red turbid liquid, sucking the supernatant of the turbid liquid into a clean beaker, drying the beaker in a drying box at constant temperature, and grinding the product to obtain the nano magnesium ferrite. The nano magnesium ferrite prepared by the method provided by the invention has the advantages of low cost, high purity, uniform appearance, environmental protection and no pollution.

Description

technical field [0001] The present invention relates to a kind of nano magnesium ferrite (MgFe 2 o 4 ) preparation method, which belongs to the technical field of nanomaterial preparation. Background technique [0002] MgFe 2 o 4 As a multi-component composite oxide with a spinel structure, its microwave-absorbing and gas-sensing properties have long been widely concerned. Ferromagnetic oxides are electromagnetic wave absorbing materials with complex dielectric loss and magnetic loss, in which MgFe with spinel structure 2 o 4 The synthesis and performance research of has always been a hot research topic. MgFe 2 o 4 The Mg in it does not have a magnetic moment, and the magnetic anisotropy is lower than that of ferrites of other metal cations with a magnetic moment, especially MgFe 2 o 4 When the particle size is reduced to the nanometer level, it also exhibits superparamagnetism, and exhibits better shielding and absorption capabilities for electromagnetic waves. I...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y40/00
Inventor 刘杰王海锋高乾陈星建徐波
Owner UNIV OF SHANGHAI FOR SCI & TECH
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