Novel wave-absorbing material and preparation method thereof

A wave-absorbing material, a new type of technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of no fluorescence effect, high density of ferrite magnetic materials, and low temperature resistance

Inactive Publication Date: 2009-06-03
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the more common wave absorbing agent used in the 12-18GHz frequency band is ferrite magnetic material, but the density of ferrite magnetic material is relatively high (for example, the density of manganese zinc ferrite is 4.82g / cm 3 , the density of iron oxide is 5.24g / cm 3 ), not resistant to high temperature, and does not have fluorescent effect

Method used

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  • Novel wave-absorbing material and preparation method thereof
  • Novel wave-absorbing material and preparation method thereof
  • Novel wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Manganese-doped zinc sulfide precursor is prepared by hydrothermal method, the content of manganese ion in manganese-doped zinc sulfide is 7%, according to the molar ratio of manganese, zinc and sulfur in manganese-doped zinc sulfide, calculate and weigh zinc nitrate hexahydrate, acetic acid tetrahydrate Add manganese and thiourea, add additives, dissolve in twice distilled water, stir for 1 hour after dissolving, pour into a polytetrafluoroethylene-lined hydrothermal reaction kettle, react at 170 degrees Celsius for 13 hours, cool naturally to room temperature, and obtain a precipitate . The precipitate was filtered, fully washed with absolute ethanol and distilled water, and dried in a vacuum oven to obtain a solid powder, which was recorded as a precursor.

[0029] The precursor is put into a vacuum furnace, evacuated and filled with argon, and heat-treated at a constant temperature of 1050 degrees Celsius for a period of time to obtain a pure hexagonal phase mangane...

Embodiment 2

[0032] Manganese-doped zinc sulfide precursor is prepared by hydrothermal method, the content of manganese ion in manganese-doped zinc sulfide is 7%, according to the molar ratio of manganese, zinc and sulfur in manganese-doped zinc sulfide, calculate and weigh zinc nitrate hexahydrate, acetic acid tetrahydrate Add manganese and thiourea, add additives, dissolve in twice distilled water, stir for 1 hour after dissolving, pour into a polytetrafluoroethylene-lined hydrothermal reaction kettle, react at 170 degrees Celsius for 13 hours, cool naturally to room temperature, and obtain a precipitate . The precipitate was filtered, fully washed with absolute ethanol and distilled water, and dried in a vacuum oven to obtain a solid powder, which was recorded as a precursor.

[0033] The precursor is put into a vacuum furnace, evacuated and filled with argon, and subjected to constant temperature heat treatment at 650 degrees Celsius for a period of time to obtain pure cubic phase mang...

Embodiment 3

[0036] Put the precursor into a vacuum furnace, vacuum and fill with nitrogen. All the other are with embodiment 1 or 2.

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Abstract

The invention relates to a novel wave-absorbing material and a preparation method thereof. The novel wave-absorbing material comprises a base material and a wave-absorbing agent, wherein, the wave-absorbing agent is pure cubic phase or hexagonal phase manganese-doped zinc sulfide microcrystal with ferromagnetism or ferrimagnetism at the room temperature. The weight ratio of the cubic phase or hexagonal phase manganese-doped zinc sulfide microcrystal is 10 to 15 percent, and the weight ratio of base material is 50 to 90 percent. The preparation method comprises the following steps: the manganese-doped zinc sulfide precursor is obtained by hydrothermal synthesis, then the heat treatment is performed to the sprecursor within the temperature range of 600 to 700 DEG C under the protection of argon gas atmosphere to obtain cubic phase manganese-doped zinc sulfide microcrystal powder, the heat treatment is performed to the cubic phase manganese-doped zinc sulfide microcrystal powder within the temperature range of 1000 to 1200 DEG C to obtain hexagonal phase manganese-doped zinc sulfide microcrystal powder, and the obtained powder is added in the base material and solidified to obtain the wave-absorbing material.

Description

technical field [0001] The invention relates to a wave absorbing agent, a wave absorbing material mainly composed of the wave absorbing agent and a preparation method thereof. Background technique [0002] Absorbing material refers to a class of materials that can absorb electromagnetic wave energy projected onto its surface. In engineering applications, in addition to requiring a high absorption rate of electromagnetic waves in a wide frequency band, the absorbing material is also required to have properties such as light weight, temperature resistance, moisture resistance, and corrosion resistance. Absorbing material is an important functional material, which was first used in the military, and with the development of science and technology began to be used in civilian fields, such as microwave darkroom materials, anti-electromagnetic radiation and interference, micro-attenuator components and electromagnetic compatibility facilities . At present, the more common wave ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00C08L63/00C08K3/30
Inventor 毕红程毛杰
Owner ANHUI UNIVERSITY
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