As a metal composite material, silver-plated glass microbead powder (SGB) has good electrical conductivity, low quality and relatively low price, and is favored in the field of high-conductivity silicone rubber preparation. Silver-plated glass beads highly conductive rubber composite material has good electromagnetic shielding performance and sealing function, so it is widely used in the sealing system of electronic equipment such as aerospace, ships, ships, workstations, computers, data communications, medical treatment and household appliances, etc. To the dual role of environmental sealing and electromagnetic shielding.
Zhang Jiyang and others studied the mechanical and electrical properties of silver-plated glass beads/silicone rubber conductive composites. The results show that with the increase in the amount of silver-plated glass beads, the mechanical properties of the composite material gradually deteriorate and the volume resistivity gradually decreases. Shen Ling and others used silver-plated glass beads (SGB) as conductive fillers to fill methyl vinyl silicone rubber (VMQ), and discussed the effect of surface modification, particle size and dosage of silver-plated glass beads on SGB/VMQ composites. The influence of electrical conductivity, mechanical properties and phase structure. Jmaes Wallker has developed conductive rubber filled with silver-plated glass beads, which has a shielding effect of 100dB in the frequency range of 20MHz-10GHz. Wallker’s Shield-seai105 rubber material can replace the high-priced conductive elastomers used in the military field. This new rubber can meet the British National Defense Standard 59-103 (MIL-G835280), the technical index requirements for electromagnetic pulse (EMP) life, vibration and volume resistance, and its operating temperature range is -55℃～220℃.
New electromagnetic wave absorption (RAM) shielding (EMI) materials require “thin, light, wide, and strong”, that is, they require low density, light weight, wide absorption frequency and strong absorption capacity. Conductive rubber can be used as an ideal material for electromagnetic shielding due to its high electrical conductivity, low apparent density, curved surface processing and in-situ molding. On the one hand, the conductive filler of the silver-plated glass microspheres reduces the volume resistivity of the composite material and greatly improves the electrical conductivity; on the other hand, it can also reduce the material cost and is an ideal conductive filler.