Metal-carbon composite particle and preparation method and application thereof

A carbon composite and particle technology, which is applied in metal processing equipment, carbon preparation/purification, nano-carbon, etc., can solve problems such as difficulty in meeting practical application requirements, impossibility of large-scale promotion and application, poor impedance matching performance, etc., and achieve excellent microwave Good absorption performance, weight reduction, and good impedance matching

Pending Publication Date: 2022-04-15
GUANGDONG POLYTECHNIC NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high conductivity of carbon-based absorbing materials, their impedance matching performance is usually poor, and it is also difficult to meet the needs of practical applications, and cannot be widely used.

Method used

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  • Metal-carbon composite particle and preparation method and application thereof
  • Metal-carbon composite particle and preparation method and application thereof
  • Metal-carbon composite particle and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of Ni-C composite particle, its preparation method comprises the following steps:

[0037] 1) Disperse 3mmol of nickel chloride hexahydrate and 0.3g (1.428mmol) of trimesic acid in 60mL of solvent (by N,N-dimethylformamide, ethanol and water in a volume ratio of 1:1:1 composition), stir until the solids are completely dissolved, then transfer the material to a high-pressure reactor, react at 150°C for 10h, centrifuge, and wash the solid obtained by centrifugation with methanol for 3 times, and then dry it under vacuum at 70°C for 12h to obtain Ni base MOF;

[0038] 2) The Ni-based MOF was calcined at 500° C. for 3 h in a nitrogen atmosphere to obtain Ni-C composite particles.

[0039] The scanning electron microscope (SEM) figure of Ni-based MOF and Ni-C composite particle in the present embodiment is as follows figure 1 (a is Ni-based MOF, b is Ni-C composite particles).

[0040] Depend on figure 1 It can be seen that the Ni-based MOF presents a smooth and c...

Embodiment 2

[0042] A kind of Ni-Co-C composite particle, its preparation method comprises the following steps:

[0043] 1) Disperse 2mmol of nickel chloride hexahydrate, 1mmol of cobalt chloride hexahydrate and 0.3g (1.428mmol) of trimesic acid in 60mL of solvent (made of N,N-dimethylformamide, ethanol and water According to the volume ratio of 1:1:1), stir until the solid is completely dissolved, then transfer the material to a high-pressure reactor, react at 150°C for 10h, centrifuge, and wash the solid obtained by centrifugation with methanol for 3 times, and then in a 70°C Drying under vacuum condition for 12h, to obtain Ni-Co-based MOF;

[0044] 2) The Ni-Co-based MOF was calcined at 500° C. for 3 h in a nitrogen atmosphere to obtain Ni-Co-C composite particles.

[0045] The SEM images of Ni-Co-based MOF and Ni-Co-C composite particles in this example are as follows figure 2 (a is Ni-Co-based MOF, b is Ni-Co-C composite particles).

[0046] Depend on figure 2 It can be seen tha...

Embodiment 3

[0048] A kind of Ni-Co-C composite particle, its preparation method comprises the following steps:

[0049] 1) Disperse 1.5mmol of nickel chloride hexahydrate, 1.5mmol of cobalt chloride hexahydrate and 0.3g (1.428mmol) of trimesic acid in 60mL of solvent (from N,N-dimethylformamide, ethanol and water according to the volume ratio of 1:1:1), stir until the solid is completely dissolved, then transfer the material to a high-pressure reactor, react at 150°C for 10h, centrifuge, and wash the solid obtained by centrifugation with methanol for 3 times, and then at 70 Dry under vacuum condition at ℃ for 12h to obtain Ni-Co-based MOF;

[0050] 2) The Ni-Co-based MOF was calcined at 500° C. for 3 h in a nitrogen atmosphere to obtain Ni-Co-C composite particles.

[0051] The SEM images of Ni-Co-based MOF and Ni-Co-C composite particles in this example are as follows image 3 (a is Ni-Co-based MOF, b is Ni-Co-C composite particles).

[0052] Depend on image 3 It can be seen that the ...

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Abstract

The invention discloses a metal-carbon composite particle and a preparation method and application thereof. The preparation method of the metal-carbon composite particles comprises the following steps: 1) dispersing cobalt salt or/and nickel salt and trimesic acid in a solvent, and reacting to obtain cobalt or/and nickel-based MOF (Metal Organic Framework); and 2) calcining the cobalt or/and nickel-based MOF in a protective atmosphere to obtain the metal-carbon composite particles. The metal-carbon composite particle has the advantages of excellent microwave absorption performance, wide absorption bandwidth, good impedance matching performance, light weight and simple preparation method, can be used in electromagnetic wave absorption materials, and has a very wide application prospect.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorbing materials, in particular to a metal-carbon composite particle and its preparation method and application. Background technique [0002] In recent years, the development of communication technology and electronic equipment has been very rapid, but it has also produced serious electromagnetic pollution problems, which will endanger human health and ecological safety. Therefore, there is an urgent need to develop a lightweight, thin broadband microwave absorbing material to convert electromagnetic energy into thermal energy and reduce harmful electromagnetic waves. Traditional electromagnetic absorbers (ferrite, magnetic metal powder, and ceramics, etc.) have good wave-absorbing properties, but have disadvantages such as high density, difficult processing, and high cost, which severely limit their practical applications. Carbon-based absorbing materials (carbon nanotubes, grap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/20B22F1/065B22F1/16H05K9/00C01B32/05C01B32/16
Inventor 单纯李春燕张子龙
Owner GUANGDONG POLYTECHNIC NORMAL UNIV
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