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Usage of manganese dioxide coated carbon particle dielectric materials as electromagnetic wave absorption materials

A technology of manganese dioxide and dielectric materials, applied in the field of wave absorbing materials, can solve problems that have not yet been found, and achieve the effects of low production cost, improved loss performance, and improved surface impedance matching.

Inactive Publication Date: 2016-03-09
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, there is no report on the use of manganese dioxide-coated carbon particles for dielectric loss materials

Method used

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  • Usage of manganese dioxide coated carbon particle dielectric materials as electromagnetic wave absorption materials
  • Usage of manganese dioxide coated carbon particle dielectric materials as electromagnetic wave absorption materials
  • Usage of manganese dioxide coated carbon particle dielectric materials as electromagnetic wave absorption materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 0.1 g of carbon black particles with a diameter of 50 nm into a mixed solution of sodium dodecylbenzenesulfonate and 10% concentration of dilute hydrochloric acid at a mass ratio of 1:10 for ultrasonic treatment for 1 hour, and then use absolute ethanol and deionized water Each was washed 3 times. Filter the carbon black and add it to 50ml deionized water for 2 hours to form a suspension;

[0033] Get 0.3 g of potassium permanganate and add it into the suspension of the above-mentioned carbon black, and stir for 6 hours;

[0034] The above mixed solution was transferred to a constant temperature water bath, and kept at 80°C for 6 hours;

[0035] After the reaction was completed, the obtained precipitate was filtered and washed three times with deionized water and absolute ethanol, and then dried at 100° C. for 8 hours to obtain a manganese dioxide-coated carbon black composite powder.

[0036] The above-mentioned manganese dioxide-coated carbon black composite pow...

Embodiment 2

[0041] Add 0.1 g of carbon black particles with a diameter of 100 nm into a mixed solution of sodium dodecylbenzenesulfonate and 10% concentration of dilute hydrochloric acid in a mass ratio of 1:10 for ultrasonic treatment for 2 hours, and then use absolute ethanol and deionized water Wash each for 3 times, filter and add to 100ml deionized water for ultrasonication for 2 hours, so that the carbon black particles are evenly dispersed in the water to form a stable suspension;

[0042] Get potassium permanganate 0.6g and join in the suspension of above-mentioned carbon black, stir 3 hours;

[0043] The above mixed solution was transferred to a constant temperature water bath, and kept at 80°C for 12 hours;

[0044] After the reaction was completed, the obtained precipitate was filtered and washed three times with deionized water and absolute ethanol, and then dried at 100° C. for 8 hours to obtain a manganese dioxide-coated carbon black composite powder.

[0045] The above-men...

Embodiment 3

[0050] Add 0.1 g of carbon sphere particles with a diameter of 300 nm to a mixed solution of sodium dodecylbenzenesulfonate and 10% concentration of dilute hydrochloric acid at a mass ratio of 1:10 for ultrasonic treatment for 1 hour, and then use absolute ethanol and deionized water Each was washed 3 times. After filtering the carbon spheres, add them to 50ml deionized water and sonicate for 2 hours to form a suspension;

[0051] Take 0.6 g of potassium permanganate and add it to the above suspension, and stir for 6 hours;

[0052] The above mixed solution was transferred to a constant temperature water bath, and kept at 90°C for 6 hours;

[0053] After the reaction is completed, the obtained precipitate is filtered and washed three times with deionized water and absolute ethanol respectively, and then dried at 100° C. for 8 hours to obtain a manganese dioxide-coated carbon sphere composite powder.

[0054] The above-mentioned manganese dioxide-coated carbon black composite...

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Abstract

The invention discloses usage of manganese dioxide coated carbon particle dielectric materials as electromagnetic wave absorption materials and belongs to the technical field of wave absorption materials. A preparation method comprises the steps of adding carbon particles into a mixed solution and absolute ethyl alcohol for ultrasonic treatment, wherein the mixed solution is obtained by mixing sodium dodecyl benzene sulfonate and 10%-concentration diluted hydrochloric acid according to a mass ratio of 1 to 10; performing ultrasonic treatment for 2 hours in deionized water, adding potassium permanganate, subjecting manganese dioxide generated under the action of water bath to nucleation and growing on the surfaces of the carbon particles to form a manganese dioxide coated carbon composite structure. According to the usage, the preparation process is simple and easy to operate, and the manganese dioxide is coated evenly. The manganese dioxide coated carbon particle composite structure has outstanding conductive performance and a dielectric loss property, can be used as a dielectric loss medium and has good application prospects in the field of electromagnetic wave absorption materials.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to the application of a manganese dioxide-coated carbon particle dielectric material as an electromagnetic wave absorbing material. Background technique [0002] The development of the electronic industry has made the application of electronic equipment more and more extensive. The electromagnetic radiation and electromagnetic interference caused by this have caused serious electromagnetic environmental pollution. It has become the fourth largest pollution source after air pollution, noise pollution and water pollution. A major measure to reduce or alleviate electromagnetic pollution is to use electromagnetic wave absorbing materials (abbreviated as absorbing materials) to convert electromagnetic energy into heat energy and consume it. At present, microwave-absorbing materials have received great attention and been widely used in military, construction and civil app...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01G45/02B82Y30/00
CPCC01G45/00C01P2004/04C01P2004/62C01P2006/40
Inventor 管洪涛党文慧王毓德陈正丁
Owner YUNNAN UNIV
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