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Environment-friendly electromagnetic shielding functional cementing material and preparation method thereof

A gelling material and electromagnetic shielding technology, applied in shielding materials, magnetic field/electric field shielding, electrical components, etc., can solve the problems of wave-absorbing performance to be improved, limited electric loss, etc., achieve low cost, save resources, and reduce environmental pollution Effect

Active Publication Date: 2021-02-09
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Red mud contains a small amount of ferric oxide. Although ferric oxide is conductive, the amount is small, the electrical loss is limited, and the microwave absorption performance needs to be improved. Therefore, there is no existing technology for using red mud as an electromagnetic shielding material.

Method used

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  • Environment-friendly electromagnetic shielding functional cementing material and preparation method thereof
  • Environment-friendly electromagnetic shielding functional cementing material and preparation method thereof
  • Environment-friendly electromagnetic shielding functional cementing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0043] S1. Soak zeolite with an average particle size of 100 mesh in 1mol / L hydrochloric acid solution with a solid-to-liquid ratio of 1:10 for 24 hours, filter and soak the mixture to remove impurities such as organic matter, then wash the zeolite with deionized water until neutral, and dry dry standby;

[0044] S2. Add starch to deionized water, stir evenly, heat until gelatinization, slowly add zeolite, the mass ratio of zeolite and starch is 7:1, microwave oscillation, centrifugal separation, washing and suction filtration, drying for later use;

[0045] S3. Put the substance obtained in step S2 into a tube furnace, raise it from room temperature to 150°C at a rate of 1°C / min under an argon atmosphere, then raise it to 250°C at a rate of 0.2°C / min, and then increase it at a rate of 1°C / min. ℃ / min raised to 350℃, constant temperature for 4 hours, and finally cooled to room temperature with the furnace, and the pre-carbonized material was ground to an average particle size o...

preparation example 2

[0048] The rest is the same as Preparation Example 1, except that the mass ratio of zeolite and starch in step S2 is 10:1.

preparation example 3

[0050] The rest is the same as that of Preparation Example 1, except that in step S3, the material obtained after pre-carbonization is ground to an average particle size of 20 μm, and passed through a 625-mesh sieve for later use.

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Abstract

The invention relates to an environment-friendly electromagnetic shielding functional cementing material and a preparation method thereof. The cementing material comprises the following raw materials:reduced red mud, cement and zeolite / porous carbon microspheres, and the zeolite / porous carbon microspheres are obtained by loading starch on zeolite, and carbonizing and grinding. The zeolite / porouscarbon microspheres and the reduced red mud are compounded for use, and the cementing material prepared by mixing the zeolite / porous carbon microspheres and the reduced red mud with cement has the functions of electric loss and magnetic loss, so that the requirements on impedance matching are met, the high-frequency and low-frequency wave-absorbing properties can be improved, and effective shielding is realized. The preparation method is simple, the cost is low, meanwhile, the red mud is recycled to the maximum extent, resources are saved, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding cement, in particular to an environment-friendly electromagnetic shielding functional gelling material and a preparation method thereof. Background technique [0002] With the rapid development of communication technology and electronic technology, more and more electronic devices are used by people, such as tablet computers, smart phones, medical equipment and radar systems. While these products bring convenience to people, electromagnetic interference and Radiation inevitably brings great troubles to people's lives, and even seriously threatens people's physical and mental health. In addition, electromagnetic interference and electromagnetic radiation can also interfere with electronic components and communication signals, and reduce the sensitivity of electronic equipment. and precision, affecting the growth of animals and plants and other hazards. Therefore, the protection o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04H05K9/00C04B20/04C04B18/04C04B20/02C04B18/02
CPCC04B18/025C04B20/04C04B28/04C04B2111/00017C04B2111/00258H05K9/0081H05K9/0083H05K9/009C04B18/0409C04B14/047C04B14/026C04B20/023Y02W30/91
Inventor 刘晓明王亚光李勇张未李泽鹏任咏玉
Owner UNIV OF SCI & TECH BEIJING
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