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Preparation method of flaky carbonyl iron powder wave-absorbing material based on application of Bluetooth communication frequency band

A technology of carbonyl iron powder and microwave-absorbing materials, which is applied in the field of microwave-absorbing materials, can solve problems such as the research on the preparation method of Bluetooth full-band high-absorbing microwave-absorbing materials, and achieve the effects of low raw material cost, simple preparation, and simple preparation process

Active Publication Date: 2017-08-15
安徽璜峪电磁技术有限公司
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Problems solved by technology

[0006] At present, there is no research on the preparation method of high-absorbing microwave-absorbing materials for Bluetooth full-band

Method used

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  • Preparation method of flaky carbonyl iron powder wave-absorbing material based on application of Bluetooth communication frequency band
  • Preparation method of flaky carbonyl iron powder wave-absorbing material based on application of Bluetooth communication frequency band
  • Preparation method of flaky carbonyl iron powder wave-absorbing material based on application of Bluetooth communication frequency band

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Embodiment 1

[0036] Before the experiment, the carbonyl iron powder raw material is preheated in a vacuum environment, the preheating temperature is 100-150° C., and the time is 3-5 hours. Put a certain amount of carbonyl iron powder raw materials and stainless steel balls into the ball milling tank according to the ball mass ratio of 1:8, add ternary surface modifier (calcium stearate + KH560 + titanate), absolute ethanol into the ball milling tank As a ball milling medium, the carbonyl iron powder is submerged in anhydrous ethanol, stirred evenly with a glass rod, and then airtightly loaded into a planetary ball mill for ball milling. The grinding body in the planetary ball mill includes three kinds of large, medium and small stainless steel balls with diameters of 16mm, 6mm and 3mm. The mass ratio of the three kinds of stainless steel balls is 10:30:60. The ball milling time is 20 hours and the speed is 200 rpm. / minute. After the wet grinding is completed, put the wet-milled slurry in...

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Abstract

The invention discloses a preparation method of a flaky carbonyl iron powder wave-absorbing material based on application of a Bluetooth communication frequency band. The preparation method comprises the following steps: preheating carbonyl iron powder in vacuum, charging the preheated carbonyl iron powder and a ternary surface modifier together into a ball milling tank, using absolute ethyl alcohol as a ball milling medium, conducting uniform stirring and ball milling treatment, and finally conducting charging into a vacuum drying chamber for conducting drying to obtain the wave-absorbing material. The flaky carbonyl iron powder wave-absorbing material prepared by the method has the advantages of thin wave-absorbing coating, light surface density, wide absorption band, strong absorbability, good mechanical properties, simple preparation and the like. The flaky carbonyl iron powder wave-absorbing material can meet the following requirements: the reflection loss (RL) of the wave-absorbing material is computed according to the transmission line theory, and when the coating thickness is 2mm, the peak value of reflection loss reaches -15dB around 2GHz, and the real absorption frequency width is 1GHz (1.6-2.6GHz) when RL is less than -10 dB, thereby completely covering the all band (2.4-2.485 GHz) of Bluetooth.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a method for preparing a sheet-shaped carbonyl iron powder wave-absorbing material based on a bluetooth communication frequency band. [0003] Background technique: [0004] With the rapid development of informatization and networking and the wide application of electronic equipment, electromagnetic waves, as an important carrier for communication systems to transmit information, have penetrated into various fields such as communications, electronics, physics, and aerospace. However, the electromagnetic radiation it produces will affect the information interaction between various electronic systems, and even threaten people's physical and mental health, leading to the deterioration of the electromagnetic environment in human living space. [0005] As an effective electromagnetic shielding material, the absorbing material can absorb and attenu...

Claims

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Application Information

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IPC IPC(8): C01G49/16C09K3/00B02C17/10B02C17/20
CPCB02C17/10B02C17/20C01G49/16C01P2004/03C09K3/00
Inventor 谢国治胡晶顾家新谭鑫王瑞邢贝贝陈将伟
Owner 安徽璜峪电磁技术有限公司
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