Barium ferrite carbon sphere composite wave-absorbing material and preparation method thereof

A composite wave-absorbing material, barium ferrite technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as lightness, thinness, width, insufficient absorption strength, narrow absorption frequency band, etc., and achieve good Effects of microwave absorption performance, high raw material cost, and mild conditions

Pending Publication Date: 2021-03-05
SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional absorbing materials - such as ferrite and ceramic materials, have the disadvantages of high density, narrow absorption frequency band and insufficient absorption strength, etc., which make it difficult to meet the requirements of "light, thin and wide"

Method used

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  • Barium ferrite carbon sphere composite wave-absorbing material and preparation method thereof
  • Barium ferrite carbon sphere composite wave-absorbing material and preparation method thereof
  • Barium ferrite carbon sphere composite wave-absorbing material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The steps of preparing barium ferrite carbon sphere nanocomposite microwave absorbing material are as follows:

[0034] (1) Barium ferrite single-phase preparation

[0035] Single-phase barium ferrite nano-magnetic powder is first prepared by hydrothermal method: according to n(Ba 2+ ):n(Fe 3+ )=1:10 respectively weigh 1.6160g Fe(NO 3 ) 3 9H 2 O and 0.2306g Ba(NO 3 ) 2 ·6H 2 The solid powder of O was dissolved in a beaker with 35mL of distilled water, and ultrasonically oscillated to fully dissolve it; then transferred to a magnetic stirrer for full stirring; according to the atomic ratio n(OH - ) / n(NO 3- )=3 Weigh 1.56g sodium hydroxide solid powder, and dissolve in 35mL distilled water; And add it dropwise in the above-mentioned barium-iron solution, adjust the pH value of the mixed solution to 11; Fully adjust the mixed solution After stirring, put it into a metal reaction kettle, place the reaction kettle in an electronic oven, set the temperature at 220°C,...

Embodiment 2

[0042] (1) Barium ferrite single-phase preparation

[0043] The single-phase barium ferrite nano-magnetic powder is first prepared by hydrothermal method: n(Ba 2+ ):n(Fe 3+ )=1:8 respectively weigh 1.6160g Fe(NO 3 ) 3 9H 2 O and 0.1845g Ba(NO 3 ) 2 ·6H 2 The solid powder of O was dissolved in a beaker with 25mL of distilled water, and ultrasonically oscillated to fully dissolve it; then transferred to a magnetic stirrer for full stirring; according to the atomic ratio n(OH - ) / n(NO 3- )=3 weigh 1.56g sodium hydroxide solid powder, and dissolve it in 50mL distilled water; and add it dropwise in the above-mentioned barium iron solution, adjust the pH value of the mixed solution to 9; adjust the mixed solution After fully stirring, put it into a metal reaction kettle, place the reaction kettle in an electronic oven, set the temperature at 180°C, and set the time for 8 hours; Wash three times, and the speed of the high-speed centrifuge during washing is set to 12000r / min....

Embodiment 3

[0049] (1) Barium ferrite single-phase preparation

[0050] The single-phase barium ferrite nano-magnetic powder is first prepared by hydrothermal method: n(Ba 2+ ):n(Fe 3+ )=1:12 Weigh respectively 1.6160g Fe(NO 3 ) 3 9H 2 O and 0.2768g Ba(NO 3 ) 2 ·6H 2 The solid powder of O was dissolved in a beaker with 50 mL of distilled water, and ultrasonically oscillated to fully dissolve it; then transferred to a magnetic stirrer for full stirring; according to the atomic ratio n(OH - ) / n(NO 3- )=3 Weigh 1.56g sodium hydroxide solid powder, and dissolve in 25mL distilled water; And add it dropwise in the above-mentioned barium-iron solution, adjust the pH value of the mixed solution to 12; Fully adjust the mixed solution After stirring, put it into a metal reaction kettle, place the reaction kettle in an electronic oven, set the temperature at 230°C, and set the time for 4 hours; after the reaction is completed, clean the formed precipitate with 8% dilute hydrochloric acid, di...

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Abstract

The invention belongs to the technical field of wave-absorbing functional materials, and particularly relates to a barium ferrite carbon sphere composite wave-absorbing material and a preparation method thereof. The preparation method comprises the following steps: preparing single-phase barium ferrite nanopowder in one step through a hydrothermal method, wherein Fe(NO3)3.9H2O and Ba(NO3)2.6H2O are used as main raw materials, and a hydrothermal reaction is conducted in an alkaline environment; mixing the prepared single-phase barium ferrite powder with glucose according to a certain mass ratio; and preparing a barium ferrite/carbon sphere composite material by using the hydrothermal method again. The results of performance tests prove that the composite material prepared by using the method has good microwave absorption performance; moreover, the method is mild in conditions and simple in preparation process; cheap and easily available glucose is used as a raw material for preparing the composite material, and the conductivity of the composite material can be improved; and preparation cost is reduced, and the method is economical, cheap and easy for industrial application.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing functional materials, and in particular relates to a barium ferrite carbon sphere composite wave-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, the military stealth technology and civilian anti-electromagnetic interference technology demand high-performance microwave absorbing materials. As a functional material, a wave-absorbing material is a material that can absorb and attenuate incident electromagnetic waves, convert electromagnetic energy into or dissipate other forms of energy, or make electromagnetic waves disappear due to interference. [0003] Traditional absorbing materials, such as ferrite and ceramic materials, have the disadvantages of high density, narrow absorption frequency band and insufficient absorption strength, etc., which make it difficult to meet the requirements of "light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 鲍思凯裴晓东骆艳华王凡李昕张金艳鲍维东钱有军
Owner SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
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