Amorphous wire-containing electromagnetic-wave absorbing material and preparation method theroef
A technology for absorbing materials and electromagnetic waves, which is applied in the direction of magnetic materials, inorganic materials, circuits, etc., can solve the problem of poor performance of wave-absorbing materials, great influence on wave-absorbing performance, weight and thickness of wave-absorbing materials that cannot meet the miniaturization of electronic products, The development trend of light weight direction and other issues
Inactive Publication Date: 2010-12-01
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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Problems solved by technology
[0005] The orientation of the amorphous powder in the sheet-shaped absorbing material has a great influence on its absorbing performance. Theoretically, when the angle φ between the length direction of the amorphous powder and the thickness direction of the material is 90 degrees, the absorbing performance of the material is the best. Due to the shape of amorphous powder and the preparation process of absorbing materials, the existing preparation technology can only control the included angle between 80≤φ≤90 degrees, which limits the further improvement of absorbing performance
In order to improve the absorption rate, the volume ratio of the amorphous powder reaches or exceeds 50%, resulting in a higher density of the absorbing material
[0006] In addition, the absorbing performance of the absorbing material made of amorphous powder decreases greatly with the decrease of the thickness, and the absorbing material with a thickness of less than 0.2mm has poor performance.
Due to the above reasons, the weight and thickness of the absorbing material prepared by amorphous powder cannot meet the development trend of existing electronic products towards miniaturization and light weight.
Method used
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Embodiment 1
[0059] The quenched glass-coated amorphous wire was prepared by glass-coated spinning method, and the composition was Co 72 Fe 5 Si 8 B 15 , the diameter of the wire metal core is 16 microns, and the thickness of the glass layer is 3 microns.
[0060] The tempered glass-coated amorphous wire is subjected to isothermal annealing treatment at a treatment temperature of 400° C. and a treatment time of 1 hour.
[0061] The schematic diagram of the preparation method of the absorbing material is shown in Figure 4 As shown, first, fix the PC film on the cylindrical fixture; then, stick the amorphous wire on the right side of the PC film; then, rotate the cylindrical fixture at a constant speed at 2 rpm; at the same time, the wire feeding device Translate at a constant speed, with a translation speed of 1.6mm / s; then, when the amorphous wire is arranged on the left side of the PC film, the cylindrical fixture and the wire feeding device stop moving at the same time; finally, app...
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The invention relates to an amorphous wire-containing electromagnetic-wave absorbing material and a preparation method theroef, in particular relating to an electromagnetic-wave absorbing material, which is characterized by comprising an amorphous wire and a matrix material, wherein the amorphous wire is utilized as a wave absorbing component. The invention also relates to the preparation method of the electromagnetic-wave absorbing material, comprising the steps of (1) preparing the amorphous wire and (2) arranging the amorphous wire on the matrix material by a coiling mode.
Description
technical field [0001] The invention belongs to the field of magnetic materials, and relates to an electromagnetic wave absorbing material containing an amorphous wire material and a preparation method thereof. Background technique [0002] At present, new mobile electronic products represented by mobile phones, notebook computers and digital cameras are developing in the direction of small size and multi-function, and the key technologies adopted are high frequency, digitization and integration. However, the resulting electromagnetic interference is becoming more and more serious and has many negative effects. The function of absorbing electromagnetic shielding materials is to convert incident electromagnetic waves into heat energy or other forms of energy through various loss mechanisms, so that electromagnetic waves neither transmit to the outside nor reflect to the inside, which is an effective way to suppress electromagnetic interference. Commonly used electromagnetic ...
Claims
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Login to View More IPC IPC(8): H01F1/153H01F1/16C22C45/00D01D5/00
Inventor 陈征张俊峰张宏浩刘天成李德仁卢志超周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD