Superparamagnetic zinc ferrite nanomaterial and its preparation method

A nano-material, zinc ferrite technology, applied in the direction of inductance/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc., can solve the problems of large particle size and difficult size control of nano-zinc ferrite, and achieve particle size The effect of uniform particle size distribution

Inactive Publication Date: 2010-05-12
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of the nano-zinc ferrite prepared by this method is large and the size is not easy to control.

Method used

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  • Superparamagnetic zinc ferrite nanomaterial and its preparation method
  • Superparamagnetic zinc ferrite nanomaterial and its preparation method
  • Superparamagnetic zinc ferrite nanomaterial and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: After 2.8227 gram of AOT is dissolved in 64ml n-heptane, put into the 250ml four mouthfuls of round-bottomed reaction flasks (fitting condensing reflux pipe) that is equipped with mechanical stir bar, and protected by nitrogen atmosphere; pH value is 2, FeCl 3 , FeSO 4 , ZnSO 4 Concentrations are 0.57mol L -1, 0.2mol·L -1 , 0.09mol·L -1 1.7ml of the mixed solution was added to the above solution and stirred for more than half an hour, and 3mol·L -1 NaOH was dropped into the microemulsion of iron salt which was stirred vigorously and the pH value was adjusted to 11; the color gradually turned brown and finally became dark black. The stirring reaction was continued for 10 minutes, and the reaction was continued for 30 minutes by heating in a water bath at 90°C. After the reaction was completed and cooled to room temperature, it was centrifuged at 10,000 rpm for 5 minutes, and washed three times with absolute ethanol and deionized water. Finally, the o...

Embodiment 2

[0031] Embodiment 2: After 5.6454 gram of AOT is dissolved in 64ml hexanaphthene, put into the 250ml four mouthfuls of round-bottomed reaction flasks that are equipped with mechanical stirrer (fit condensing reflux pipe), and be protected by nitrogen atmosphere; The pH value is 3, FeCl 3 , FeSO 4 , ZnSO 4 Concentrations are 0.6mol L -1 , 0.27mol L -1 , 0.03mol·L -1 1.7ml of the mixed solution was added to the above solution and stirred for more than half an hour, and 6mol·L -1 NaOH was dropped into the ferric salt microemulsion which was stirred vigorously and the pH value was adjusted to 13; the color gradually turned brown and finally became dark black. The stirring reaction was continued for 10 minutes, and the reaction was continued for 50 minutes by heating in a water bath at 60°C. After the reaction was completed and cooled to room temperature, it was centrifuged at 10,000 rpm for 5 minutes, and washed three times with absolute ethanol and deionized water. Finally...

Embodiment 3

[0032] Embodiment 3: after 2.8227 gram of AOTs are dissolved in 64ml decane, put into the 250ml four mouthfuls of round-bottomed reaction bottles that are equipped with mechanical stirrer (fit condensing reflux tube), and be protected by nitrogen atmosphere; pH is 2, Fe 3+ , Fe 2+ , Zn 2+ 0.57mol L -1 , 0.2mol·L -1 , 0.09mol·L -1 4.0ml of the mixed solution was added to the above solution and stirred for more than half an hour, and 5mol·L -1 NaOH was dropped into the microemulsion of iron salt which was stirred vigorously and the pH value was adjusted to 11; the color gradually turned brown and finally became dark black. The stirring reaction was continued for 10 minutes, and the reaction was continued for 30 minutes by heating in a water bath at 80°C. After the reaction, it was aged for one hour, cooled to room temperature under the protection of nitrogen atmosphere, centrifuged at 10,000 rpm for 5 minutes, and washed three times with absolute ethanol and deionized water...

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Abstract

There is provided a kind of super syn-magnetic zinc and ferrite nanometer material as well as its preparing method which belongs to nanometer magnetic material domain. The material is black globular bead the diameter of which is 1-12nm; bead is pointed spar structure and the size is very uniform. The preparing technology includes the following steps: charging the prepared FeCl3, FeSO4 and ZnSO4 mixed solution to the prepared AOT diolefine solution slowly and stirring it to form micro emulsion; adding NaOH or KOH solution to the previous solution; keeping on fast stirring to get the suspension;cooling the mentioned solution to room temperature, centrifuging the solution and ultrasonic washing it; vacuum drying at 60-80 Deg C for more than 12h. The transmission electronmicroscope shows thatthe product of the invention is uniform globular particles. The nanometer material has the advantage of small size, high intensity of saturated magnetism, high stability and good aqueous phase dispersibility.

Description

1. Technical field [0001] The invention belongs to the technical field of nano magnetic materials, and more specifically relates to a superparamagnetic zinc ferrite nano material and a preparation method thereof. 2. Background technology [0002] In recent years, research on the preparation methods and properties of magnetic nanoparticles has received great attention. This is not only because magnetic nanoparticles have special significance in basic physical theory, but also have a wide range of uses in practical applications. In terms of magnetic recording materials, magnetic nanoparticles are expected to replace traditional micron-sized magnetic powders for the preparation of high-density magnetic recording materials; in the field of biotechnology, magnetic fluids made of magnetic nanoparticles have been widely used in magnetic immune cell separation , MRI contrast imaging, and drug targeting. Due to the low toxicity and biocompatibility of water-phase dispersed ferrite,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/30C04B35/622H01F1/10H01F41/00
Inventor 安学勤张敏
Owner NANJING NORMAL UNIVERSITY
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