Electromagnetic shielding windows for computers
An electromagnetic shielding and computer technology, applied in the fields of magnetic field/electric field shielding, computing, electrical components, etc., can solve the problems of reduced light transmittance, high amount of conductive particles added, increased cost, etc., and achieves high transparency, low haze, Effect of excellent electromagnetic shielding performance
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Embodiment 1
[0024] Add 100 parts by weight of homopolymer of methyl methacrylate (PMMA), 2.0 parts by weight of nickel-boron-coated silica particles and 0.40 parts by weight of silver nanowires into a high-speed mixer with a stirring speed of 3000 rev / min, and the stirring time was 20 minutes to obtain a well-mixed mixture. The mixture was heated to form a slurry, which was added to a mold composed of two pieces of silica glass and pads and cast to obtain a thin plate with a thickness of 10mm. After testing, the visible light transmittance was 82.3%, and the haze was 1.0%. The shielding effectiveness at the electromagnetic frequency of 10 KHz-100MHz is not less than 50dB.
Embodiment 2
[0026] Add 100 parts by weight of homopolymer of methyl methacrylate (PMMA), 5.0 parts by weight of nickel-boron-coated silica particles and 1.0 parts by weight of silver nanowires into a high-speed mixer with a stirring speed of 2500 rev / min, and the stirring time was 30 minutes to obtain a well-mixed mixture. The mixture was heated to form a slurry, which was added to a mold composed of two pieces of silica glass and pads and cast to obtain a thin plate with a thickness of 10mm. After testing, the visible light transmittance was 76.3%, and the haze was 1.8%. The shielding effectiveness at the electromagnetic frequency of 10 KHz-100MHz is not less than 50dB.
Embodiment 3
[0028] Add 100 parts by weight of homopolymer of methyl methacrylate (PMMA), 3.0 parts by weight of nickel-boron-coated silica particles and 0.5 parts by weight of silver nanowires into a high-speed mixer with a stirring speed of 2500 rev / min, and the stirring time was 30 minutes to obtain a well-mixed mixture. The mixture was heated to form a slurry, which was added to a mold composed of two pieces of silica glass and pads and cast to obtain a thin plate with a thickness of 10mm. After testing, the visible light transmittance was 79.1%, and the haze was 1.5%. The shielding effectiveness at the electromagnetic frequency of 10 KHz-100MHz is not less than 50dB.
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