Heat conduction-wave absorption integrated material as well as preparation method and application thereof

A wave-absorbing filler and matrix technology, which is applied in the field of heat conduction-microwave absorption, can solve problems such as narrow absorption bandwidth, difficulty in controlling shape and size, and cumbersome experimental steps, and achieve excellent heat conduction and wave absorption performance, good industrial application potential, The preparation process is simple and controllable

Active Publication Date: 2022-07-29
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the Chinese patent document (CN109679280A) discloses a titanium dioxide / conductive graphite / epoxy resin / boron nitride composite material and a preparation method thereof, in which titanium dioxide-coated Conductive graphite, in addition, in order to improve thermal conductivity, it is stirred and mixed with epoxy resin and nano-boron nitride. The shielding performance, thermal conductivity and mechanical properties of this material are better, but the preparation method has many steps, but its preparation The process takes a long time, the experiment repeatability is poor, and the operation is complicated;
[0004] Chinese patent document (CN104876611B) discloses a kind of lanthanum oxide / titanium dioxide / water-based titanate modified graphene-enhanced ceramics and a preparation method thereof. Graphene-reinforced ceramics are prepared by ball milling, drying, dry pressing, and sintering. The selection of this material can greatly exert the thermal conductivity of graphene. It has a certain shielding performance, but it is a reflective absorbing material with narrow absorption bandwidth or point frequency absorption, which means that the reflected electromagnetic waves will cause secondary pollution and cannot truly achieve electromagnetic protection
However, the shape and size of the existing composite heat-conducting and absorbing materials are difficult to control, the experimental steps are cumbersome, the conditions are harsh, the operation is complicated and the process is cumbersome, and its absorbing performance is difficult to meet the requirements of "thin, light, wide and strong".

Method used

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  • Heat conduction-wave absorption integrated material as well as preparation method and application thereof
  • Heat conduction-wave absorption integrated material as well as preparation method and application thereof
  • Heat conduction-wave absorption integrated material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A preparation method of a heat conduction-wave absorbing integrated material, specifically comprising the following steps:

[0056] Mix 0.3g of nano-titanium dioxide and 0.5mL of iron pentacarbonyl evenly and spread it in the quartz ark; then wrap the quartz ark completely with double-layer tin foil, and place it in a tube furnace. The heating rate of min was raised to 250°C, after holding for 1 hour, the temperature was raised to 400°C at a heating rate of 5°C / min, and after holding for 1 hour, it was cooled to room temperature and taken out to obtain the thermally conductive wave absorbing filler;

[0057] The thermally conductive wave-absorbing filler obtained above is filled into a silicone oil matrix in a certain proportion to prepare a silicone film: first, 0.48g of hydrogen-containing silicone oil, 1.5g of vinyl silicone oil, 0.005g of inhibitor and 0.6g of ethanol are weighed and stirred in a container for 30min , then add 0.02g of catalyst and stir for 5 minute...

Embodiment 2

[0062] Compared with the preparation steps disclosed in Example 1, the only difference is that the mass of iron pentacarbonyl added is 0.25mL, and the other preparation steps and process parameters are the same.

[0063] The phase, morphology, elemental composition of the obtained product measured under XRD, EDX, scanning electron microscope, and the stretching and bending pictures of the silica gel film taken under macroscopic conditions are as follows. Figures 5 to 8 shown. Figure 5 XRD analysis shows that the product consists of a large amount of anatase and a small amount of rutile-structured TiO 2 , body-centered cubic Fe and amorphous carbon composition. The elemental composition of the obtained product measured under EDX is as follows Image 6 As shown, the product is composed of Ti, Fe, O, C elements, the atomic percentage of Fe is 3.29%, and the atomic percentage of C is 9.91%. The morphology of the obtained product measured under the scanning electron microscope...

Embodiment 3

[0067] Compared with the preparation steps disclosed in Example 1, the only difference is that the mass of iron pentacarbonyl added is 0.75mL, and the other preparation steps and process parameters are the same.

[0068] The elemental composition of the obtained product measured under EDX is as follows Figure 9 shown. The product is composed of Ti, Fe, O, C elements, the atomic percentage of Fe is 6.14%, and the atomic percentage of C is 12.59%.

[0069] The heterogeneous material is filled in the base material with a mass fraction of 45%, and its reflectivity is measured as shown in Table 1. The effective bandwidth of the reflectivity less than or equal to -10dB is 9.2GHz, and the maximum reflection loss is -41.82dB; its thermal The conductivity is 1.520W / (m·K).

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Abstract

The invention belongs to the technical field of heat conduction-microwave absorption, and discloses a heat conduction-microwave absorption integrated material as well as a preparation method and application thereof. According to the invention, a carbon and iron coated heat conduction-electrical insulation type nano material is used as a filler, a silicone oil matrix is filled with the filler according to a certain proportion, and a release paper tabletting and curing film-forming process is adopted to prepare the heat conduction-wave absorption integrated material; the preparation process is simple and controllable, and the heat-conducting and wave-absorbing properties can be regulated and controlled by changing the proportion of the filler to the silicone oil in the preparation process and the proportion of the carbon, the iron and the heat-conducting-electric insulation type nano material. The prepared material is excellent in heat conduction and wave absorption performance, the problems that a traditional separated heat conduction and wave absorption plate is large in thickness, high in cost, poor in heat conduction and wave absorption performance, complex in process and the like are solved, and the good industrial application potential is achieved.

Description

technical field [0001] The invention belongs to the technical field of thermal conduction and microwave absorption, relates to a thermal conduction-wave absorbing integrated material and a preparation method thereof, and in particular relates to a thermal conduction-electric insulating material@Fe@C nano-core-shell composite filler and thermal conduction-wave absorbing Preparation method and application of integrated silica gel membrane. Background technique [0002] The high frequency of 5G communication and the miniaturization and integration of electronic components have caused serious electromagnetic interference and heat dissipation problems. The heat-conducting and wave-absorbing integrated material can not only conduct heat, but also effectively absorb and attenuate incident electromagnetic wave energy. It is an effective way to solve the electromagnetic interference and heat dissipation problems of current electronic equipment and protect its normal operation. At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/30C09J183/07C09J183/05C09J11/04H05K9/00
CPCC09J7/10C09J7/30C09J183/04C09J11/04H05K9/0081C08K2003/2241C08K2003/222C08K2003/2227C08K2003/385C08K2201/011C09J2400/14C08L2203/20C08L83/04C08K3/22C08K3/18C08K3/28C08K3/38Y02P20/10
Inventor 童国秀范宝新季然邢璐游菲菲何千梅兰应棋杨凯霞周凡洁吴丽珊姚琪彬吴文华
Owner ZHEJIANG NORMAL UNIVERSITY
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