a cu 9 the s 5 /c composite material and its preparation method and application

A composite material and composite technology, applied in the field of Cu9S5/C composite material and its preparation, can solve the problems of complex preparation process, insufficient absorption strength, poor impedance matching, etc., and achieve simple preparation process, controllable component content, absorption Bandwidth effect

Active Publication Date: 2022-03-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors found that most of the reported carbon-based dielectric absorbing materials have disadvantages such as complex preparation process, high cost, poor impedance matching, large absorption thickness, and insufficient absorption strength.

Method used

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  • a cu <sub>9</sub> the s <sub>5</sub> /c composite material and its preparation method and application
  • a cu <sub>9</sub> the s <sub>5</sub> /c composite material and its preparation method and application
  • a cu <sub>9</sub> the s <sub>5</sub> /c composite material and its preparation method and application

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preparation example Construction

[0044] In yet another specific embodiment of the present invention, the above-mentioned Cu 9 S 5 The preparation method of / C composite material, described method comprises:

[0045] S1, calcining copper-containing metal-organic frameworks (MOFs) under inert gas to obtain Cu / C composites;

[0046] S2. The above Cu / C composite and sulfur source are placed in an inert gas environment for high-temperature vulcanization reaction to obtain Cu 9 S 5 / C Composite.

[0047] The preparation method adopted in the present invention can realize Cu 9 S 5 The uniform loading of nanoparticles on the surface and interior of the carbon substrate realizes the effective regulation of electromagnetic parameters, and is a simple and efficient method for preparing transition metal sulfide / carbon composite electromagnetic wave absorbers.

[0048] In yet another specific embodiment of the present invention, in the step S1, the metal-organic framework material containing copper may be HKUST-1, w...

Embodiment 1

[0069] An octahedral Cu 9 S 5 The preparation method of / C composite electromagnetic wave absorbing material comprises the following steps:

[0070] (1) with Cu(NO 3 ) 2 ·3H 2 O as copper source, trimesic acid as organic ligand, 0.91 g of Cu(NO 3 ) 2 ·3H 2 0.0.079 grams of organic ligands were dissolved in 25mL of methanol respectively, stirred to obtain a clear solution, and the two solutions were mixed under ultrasonic conditions to obtain a mixture, and the ultrasonic reaction was performed for 10 minutes, and then left to stand at room temperature for 4 hours; The product was washed and dried at 60°C for 12 hours to obtain the HKUST-1 precursor;

[0071] (2) The HKUST-1 precursor prepared in step (1) was kept at 750°C for 1 hour under the protection of an inert gas for carbonization treatment to obtain a Cu / C intermediate product;

[0072] (3) Place the Cu / C intermediate product prepared in step (2) in a porcelain boat, place excess thiourea in the upstream of the t...

Embodiment 2

[0074] Same as Example 1, the difference is: the Cu / C intermediate product before sulfidation in step (3) is treated with nitric acid, so that the Cu particles are reduced. The specific treatment conditions are: 0.15 grams of Cu / C composites are put into 100 mL of 10 mmol / L nitric acid solution, stirred for 20 minutes, and then subjected to the same vulcanization treatment as in Example 1 to obtain Cu 9 S 5 Cu with reduced content 9 S 5 / C Composite electromagnetic wave absorbing material.

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Abstract

The invention provides a Cu 9 S 5 The / C composite material and its preparation method and application belong to the technical field of electromagnetic wave absorbing materials. The composite electromagnetic wave absorbing material is synthesized by room temperature precipitation, carbonization and vulcanization, and the composite is made of Cu 9 S 5 Nanoparticles and carbon substrate composition, Cu 9 S 5 The nanoparticles are embedded in the interior and surface of the octahedral carbon substrate. The electromagnetic wave absorbing material of the invention is simple to prepare, low in cost, light in weight, high in dielectric loss, etc., and has excellent absorption performance on electromagnetic waves, so it has good practical application value.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave absorbing materials, in particular to a Cu 9 S 5 / C composite materials and their preparation methods and applications. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the rapid development of modern communication technology and the widespread use of electronic products, the problem of electromagnetic pollution has become increasingly serious. Therefore, efficient electromagnetic wave absorbing materials have important research significance. According to the loss type, electromagnetic wave absorbing materials mainly include magnetic loss type and dielectric loss type materia...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H05K9/00
CPCH05K9/0075
Inventor刘久荣刘伟徐冬梅吴莉莉汪宙王凤龙张子栋
OwnerSHANDONG UNIV