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Preparation method of magnesium ferrite nano-particles

A nanoparticle and magnesium ferrite technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve problems such as high energy consumption and complicated process, and achieve low energy consumption, simple preparation process, and low equipment cost Effect

Inactive Publication Date: 2013-12-04
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 magnesium ferrite nano-particles
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  • Preparation method of magnesium ferrite nano-particles

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Embodiment

[0026] A method for preparing magnesium ferrite nanoparticles is adopted, the steps are as follows:

[0027] Step A: 2g of magnesium powder with a purity of 99% is put into a beaker, and the first mixture obtained after adding 50mL of deionized water is placed in an ultrasonic cleaning tank with a frequency of 40kHz and a power of 120W, and is ultrasonically hydrolyzed for 4 hours at normal temperature and pressure After that, a white emulsion colloid is obtained;

[0028] Step B: After drying the white emulsion colloid in a constant temperature drying oven at 80°C, grind it with an agate mortar to obtain Mg(OH) 2 nanoparticles;

[0029] Step C: Weigh Mg(OH) by element content ratio Mg / Fe=1:2 2 Nanoparticles and FeCl 3 ·6H 2 O;

[0030] Step D: the Mg(OH) that will take by weighing 2 The nanoparticles are added to the first beaker with deionized water, and the frequency is 40kHz, the power is 120W, and the ultrasonic cleaning tank is ultrasonically hydrolyzed for 1h; the...

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Abstract

The invention discloses a preparation method of magnesium ferrite nano-particles. The preparation method comprises the following steps of mixing magnesium powder and deionized water into a first mixture according to a ratio of 1g: 25mL to 1g: 20mL, carrying out ultrasonic hydrolysis of the first mixture at a normal temperature under normal pressure to obtain white liliquoid, carrying out constant-temperature drying of the white liliquoid, grinding the dried white liliquoid to obtain Mg(OH)2 nano-particles, weighing the Mg(OH)2 nano-particles and FeCl3.6H2O according to an element content ratio of Mg to Fe of 1: 2, adding the weighed Mg(OH)2 nano-particles into a first beaker with deionized water, carrying out ultrasonic pre-treatment for 1h, putting the weighed FeCl3.6H2O into a second beaker, carrying out precipitation by a chemical coprecipitation method to obtain Fe(OH)3 precipitates, diluting the Fe(OH)3 precipitates by deionized water so that the Fe(OH)3 precipitates have a pH value of 7, mixing the pretreated Mg(OH)2 and the dilute Fe(OH)3 precipitates having a pH value of 7 by stirring for a certain time to obtain a second mixture, carrying out ultrasonic activation of the second mixture under normal pressure, in ultrasonic activation, taking out the mixture, carrying out stirring multiple times to obtain a third mixture, carrying out constant-temperature drying of the third mixture to obtain a forth mixture, grinding the forth mixture into powder, putting the powder into a muffle furnace, carrying out calcination at a temperature of 700 DEG C for 5h, and carrying out cooling in the muffle furnace.

Description

technical field [0001] A preparation method of magnesium ferrite nanoparticles, in particular a preparation method of ultrasonic-assisted synthesis of magnesium ferrite nanoparticles. technical background [0002] As a multi-component composite oxide with spinel structure, magnesium ferrite has attracted widespread attention for its microwave-absorbing properties. Ferromagnetic oxides are electromagnetic wave absorbing materials with complex phase dielectric loss and magnetic loss. Among them, the synthesis and performance research of magnesium ferrite with spinel structure has been a hot research topic. Mg in magnesium ferrite does not have a magnetic moment, and the magnetic anisotropy is lower than that of ferrites with other metal cations with magnetic moments, especially when the particle size of magnesium ferrite is reduced to the nanometer level, it also shows superparamagnetism , showing better shielding and absorbing ability to electromagnetic waves. In recent yea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y30/00
Inventor 唐宏志王树林徐波赵立峰朱于张永刚
Owner UNIV OF SHANGHAI FOR SCI & TECH
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