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Preparation method of foamed nickel-based oxide composite wave-absorbing material

A technology of composite absorbing materials and oxides, applied in chemical instruments and methods, other chemical processes, electrical components, etc., can solve the problems of prolonging the material preparation cycle, limiting practical applications, and cumbersome preparation processes, achieving repeatability and Strong controllability, short preparation cycle and simple process

Active Publication Date: 2021-03-16
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently reported research process of loading oxides on nickel foam is very cumbersome, often requiring complex pretreatment of commercial nickel foam, and then using chemical means to grow oxides on nickel foam. These complex processes not only prolong the The preparation cycle of the material, and the higher cost, greatly limits its practical application
CN105023768B, CN103359796A, CN104925790B, CN104332328B etc. disclose a kind of preparation method of oxide composite material on foamed nickel respectively, but the disclosed methods all have the problems such as complicated preparation process and high cost

Method used

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  • Preparation method of foamed nickel-based oxide composite wave-absorbing material
  • Preparation method of foamed nickel-based oxide composite wave-absorbing material
  • Preparation method of foamed nickel-based oxide composite wave-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Accurately weigh 1.45g Ni (NO 3 ) 2 ·6H 2 O and 0.4054g FeCl 3 ·6H 2 O and 1gF127 were placed in an agate mortar and ground for 10 minutes until the materials were mixed; the mixed materials were collected and dried in a blast drying oven at 80°C for 6 hours to obtain a foaming material precursor; Calcined at 500°C for 2h at °C / min to obtain a nickel-ferrite-supported foamed nickel-based oxide composite absorber.

[0034] figure 1 S1 is the X-ray diffraction pattern of the prepared sample. The main peak is the peak of metallic nickel, and the diffraction peak of nickel ferrite can be observed by zooming in on the spectrum. The peak shape is good and has good crystallinity.

[0035] figure 2 This is the scanning electron microscope image of the synthesized absorbing material in this example, from which it can be seen that the material is in a regular porous shape.

Embodiment 2

[0037] Accurately weigh 1.45gNi(NO 3 ) 2 ·6H 2 O and 0.1488g Zn(NO 3 ) 2 ·6H 2 O and 0.5g P123 were placed in an agate mortar and ground for 15 minutes until the materials were evenly mixed. The mixed material was collected and dried in a blast drying oven at 60° C. for 12 hours to obtain a foam material precursor. Finally, it was calcined at 200°C for 3h at a heating rate of 1°C / min to obtain a zinc oxide-supported foamed nickel-based oxide composite absorber.

[0038] figure 1 S2 is the X-ray diffraction pattern of the prepared sample.

[0039] Figure 4 The scanning electron microscope image of the wave-absorbing material prepared for this example, it can be seen from the image that a porous zinc oxide-loaded porous nickel-based material is obtained.

Embodiment 3

[0041] Accurately weigh 1.45gNi(NO 3 ) 2 ·6H 2 O and 0.5948g CoCl 2 ·6H 2 O and 0.5g F127 were placed in an agate mortar and ground for 20 minutes until the materials were evenly mixed. The mixed material was collected and dried in a blast drying oven at 100° C. for 3 hours to obtain a foam material precursor. Finally, it was calcined at 400° C. for 30 minutes at a heating rate of 10° C. / min to obtain a foamed nickel-based oxide composite absorbing material supported by nickel oxide.

[0042] figure 1 S3 is the X-ray diffraction pattern of the prepared sample.

[0043] Figure 5 The scanning electron microscope image of the wave-absorbing material prepared for this example, it can be seen from the image that the nickel oxide-loaded porous nickel-based foam material exhibits a regular morphology.

[0044]In the preparation process of the foamed nickel-based oxide composite wave-absorbing material provided by the present invention, it is necessary to strictly control the...

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Abstract

The invention belongs to the field of inorganic wave-absorbing materials, and relates to a preparation method for forming a composite wave-absorbing material by in-situ growth of an oxide on a foamednickel substrate by adopting a solvent-free method, which comprises the following steps: S1, mixing a divalent nickel salt, a metal salt of an oxide to be generated and a low-melting-point polymer, uniformly performing grinding, and performing drying to obtain a precursor; and S2, calcining the precursor to obtain the foamed nickel-based oxide composite wave-absorbing material. The preparation method of the foamed nickel-based oxide composite wave-absorbing material provided by the invention is simple in process, short in preparation period, low in requirement on production equipment and easyfor industrial production; the prepared foamed nickel-based wave-absorbing material has the advantages of light weight, wide wave-absorbing frequency band and strong absorbing capacity.

Description

technical field [0001] The invention relates to a preparation method for in-situ growth of oxides on foamed nickel substrates to form composite wave-absorbing materials by using a solvent-free method, and belongs to the field of inorganic wave-absorbing materials. Background technique [0002] With the rapid development of the electronic industry, electronic equipment such as computers and wireless communication equipment have been widely used in human production and life. The electromagnetic waves radiated by these electronic devices that use electromagnetic waves as information carriers have caused serious electromagnetic interference problems. The interference of precision electronic devices by electromagnetic waves will cause their performance to decline or even be paralyzed. In addition, the thermal effect produced by electromagnetic waves entering the human body will cause harm to human health, and will also cause diseases of the nervous system, immune system, and endo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00H05K9/00
CPCC09K3/00H05K9/0081
Inventor 吴宏景秦明张利民常卿
Owner NORTHWESTERN POLYTECHNICAL UNIV
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