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Ferroferric oxide and zinc oxide nuclear shell nano-rod for absorbing high-frequency electromagnetic waves and manufacturing method thereof

A technology of ferroferric oxide and nanorods, which is applied in the field of nanomaterials, can solve problems such as coating thickness, and achieve the effect of simple operation and low thickness

Inactive Publication Date: 2010-07-07
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite nanomaterial has a strong absorption of electromagnetic waves, but requires a thicker coating

Method used

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  • Ferroferric oxide and zinc oxide nuclear shell nano-rod for absorbing high-frequency electromagnetic waves and manufacturing method thereof
  • Ferroferric oxide and zinc oxide nuclear shell nano-rod for absorbing high-frequency electromagnetic waves and manufacturing method thereof
  • Ferroferric oxide and zinc oxide nuclear shell nano-rod for absorbing high-frequency electromagnetic waves and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Add 0.25-1.0mol / L FeCl 3 The solution was placed in a stainless steel sealed autoclave, and kept in an oven at 110°C for 12 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol, and dried at 80°C to obtain β-FeOOH nanorods ;

[0019] (2) Ultrasonic dispersion of 0.05g β-FeOOH nanorods into 15ml ethylenediamine (0.15mol L -1 ) aqueous solution, then add 15ml of 0.1mol·L -1 Zn(AC) 2 After stirring the aqueous solution for 15 minutes, the mixed solution was poured into a sealed stainless steel autoclave liner, and the autoclave was put into an oven at 120° C. for 12 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol and dried in the air, then annealed at 500°C for 3 hours, and the obtained powder was mixed with ethylenediamine aqueous solution and Zn(AC) 2 The second treatment in aqueous solution, fi...

Embodiment 2

[0022] (1) Add 0.25-1.0mol / L FeCl 3 The solution was placed in a stainless steel sealed autoclave, and kept in an oven at 100°C for 12 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol, and dried at 80°C to obtain β-FeOOH nanorods ;

[0023] (2) Ultrasonic dispersion of 0.05g β-FeOOH nanorods into 15ml ethylenediamine (0.15mol L -1 ) aqueous solution, then add 15ml of 0.1mol·L -1 Zn(AC) 2 After stirring the aqueous solution for 15 minutes, the mixed solution was poured into a sealed stainless steel autoclave liner, and the autoclave was put into an oven at 120° C. for 12 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol and dried in the air, then annealed at 500°C for 3 hours, and the obtained powder was mixed with ethylenediamine aqueous solution and Zn(AC) 2 The second treatment in aqueous solution, fi...

Embodiment 3

[0026](1) Add 0.25-1.0mol / L FeCl 3 The solution was placed in a stainless steel sealed autoclave, and kept in an oven at 120°C for 12 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol, and dried at 80°C to obtain β-FeOOH nanorods ;

[0027] (2) Ultrasonic dispersion of 0.05g β-FeOOH nanorods into 15ml ethylenediamine (0.15mol L -1 ) aqueous solution, then add 15ml of 0.1mol·L -1 Zn(AC) 2 After stirring the aqueous solution for 15 minutes, the mixed solution was poured into a sealed stainless steel autoclave liner, and the autoclave was put into an oven at 120° C. for 12 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol and dried in the air, then annealed at 500°C for 3 hours, and the obtained powder was mixed with ethylenediamine aqueous solution and Zn(AC) 2 The second treatment in aqueous solution, fil...

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Abstract

The invention provides a ferroferric oxide and zinc oxide nuclear shell nano-rod for absorbing high-frequency electromagnetic waves and a manufacturing method thereof. The manufacturing method comprises the following steps of: putting solution of FeCl3 into a stainless steel sealed autoclave, and keeping the temperature between 100 and 120 DEG C for 12 hours; when the autoclave is cooled to the room temperature naturally, washing a deposit in the autoclave by using water and ethanol; dying the deposit at the temperature of 80 DEG C to obtain a beta-FeOOH nano-rod; putting the beta-FeOOH nano-rod into aqueous solution of ethylene diamine through ultrasonic dispersion, then adding aqueous solution of Zn(AC)2 into the mixture, and reacting the mixture for 12 hours at the temperature of 120 DEG C; when the autoclave is cooled to the room temperature naturally, washing the deposit in the autoclave by using the water and the ethanol, drying the deposit in the air, and annealing the deposit for 3 hours at the temperature of 500 DEG C; performing a second treatment on the obtained powder in the aqueous solution of the ethylene diamine and the aqueous solution of the Zn(AC)2, filtering the mixture, and drying the deposit to obtain a Fe2O3 / ZnO nuclear shell nano-rod; and annealing the Fe2O3 / ZnO nuclear shell nano-rod for 5 to 7 hours at the temperature of between 360 and 380 DEG C under an 8 to 10 percent H2 / Ar atmosphere to obtain a ferroferric oxide / zinc oxide nano-rod. The manufacturing method is simple to operate and is suitable for industrial production.

Description

(1) Technical field [0001] The invention relates to a nanometer material, in particular to a ferric oxide / zinc oxide core-shell nanorod with strong absorption characteristics for high-frequency electromagnetic waves. The invention also relates to a preparation method of iron ferric oxide / zinc oxide core-shell nanorods with strong absorption characteristics for high-frequency electromagnetic waves. (2) Background technology [0002] With the rapid development of nanotechnology, the application of nanomaterials in the field of electromagnetic wave absorption has attracted widespread attention at home and abroad. Metallic magnetic nanoparticles such as iron, cobalt, nickel, etc. have large magnetization and "snooker limit" in the high frequency range. Therefore, they can absorb high-frequency electromagnetic waves. However, the conductance of these metal particles is relatively large, and eddy current loss will occur under the action of an external field, thereby significantl...

Claims

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Application Information

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IPC IPC(8): B82B1/00B82B3/00
Inventor 陈玉金朱春玲肖钢张帆
Owner HARBIN ENG UNIV
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