Electromagnetic wave restraint sheet metal
An electromagnetic wave and thin plate technology, which is applied in the field of electromagnetic wave suppression thin plate, can solve the problems of increasing the dielectric constant electric wave, improving the electric wave absorption characteristics, increasing the dielectric constant, etc.
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experiment example 1
[0074] Experimental example 1: Chlorination rate
[0075] The following electromagnetic wave suppressing sheet was produced.
[0076] In Examples, chlorinated polyethylene (ELASLEN manufactured by Showa Denko Co., Ltd.) having a chlorination rate of 30% by mass or 40% by mass was used, and the content of the magnetic powder was set to 35% by volume or 40% by volume.
[0077] On the other hand, in the comparative example, chlorinated polyethylene (ELASLEN manufactured by Showa Denko Co., Ltd.) having a chlorination rate of 45% by mass was used, and the content of the magnetic powder was set to 35% by volume or 40% by volume.
[0078] The magnetic powder of embodiment and comparative example has all used and is made of Fe 67.9 co 4 Ni 4 sn 3.5 P 8.8 C 10.8 B 1 (at%) amorphous magnetic alloy. The above-mentioned magnetic powder was flat, with an average particle diameter D50 of 58 μm and an aspect ratio of 102.
[0079] In addition, the sheet thickness of the electromagn...
experiment example 2
[0089] Experimental example 2: Packing density of magnetic powder
[0090] In the experiment, an electromagnetic wave suppression sheet using chlorinated polyethylene (ELASLEN manufactured by Showa Denko Co., Ltd.) with a chlorination rate of 30 mass%, 40 mass% or 45 mass% was formed, and the chlorination rate and magnetic powder properties were investigated. Relationship between fill densities.
[0091] The magnetic powder used in the experiment is made of Fe 67.9 co 4 Ni 4 sn 3.5 P 8.8 C 10.8 B 1 composed of amorphous magnetic alloys. The above-mentioned magnetic powder was flat, with an average particle diameter D50 of 56 μm and an aspect ratio of 100.
[0092] Furthermore, the sheet thickness of the electromagnetic wave suppressing sheet was 90 μm.
[0093] Table 3 below and image 3 Shows the relationship between the chlorination rate and the packing density of the magnetic powder.
[0094] table 3
[0095] Chlorination rate (%)
[0096] as table 3 a...
experiment example 3
[0097] Experimental Example 3: Content of Magnetic Powder
[0098] The following electromagnetic wave suppressing sheet was produced.
[0099] The content of the magnetic powder was set to 35% by volume, 37.5% by volume, 40% by volume, 45% by volume, or 50% by volume.
[0100] The magnetic powder used is made of Fe 67.9 co 4 Ni 4 sn 3.5 P 8.8 C 10.8 B 1 composed of amorphous magnetic alloys. The above-mentioned magnetic powder was flat, with an average particle diameter D50 of 56 μm and an aspect ratio of 100.
[0101] Furthermore, a chlorinated polyethylene (ELASLEN manufactured by Showa Denko Co., Ltd.) having a chlorination rate of 30% by mass was used.
[0102] In the experiment, the thin plate thickness of each electromagnetic wave suppressing thin plate, the real part μ (13.56MHz) and the imaginary part μ” (1GHz) of the complex relative magnetic permeability in the in-plane direction of the thin plate, the filling of the magnetic powder Density and relative den...
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