CAJ | 학술논문

为减少球形Ni/Al填充量并提高Ni/Al填充导电硅橡胶屏蔽效能，选取Ni/C纤维加入到此种导电橡胶中，并从导电性、屏蔽性能方面对其进行评价。实验发现 Ni/C 纤维的掺杂可以提高导电橡胶的导电性及屏蔽性能。当总颗粒填充量为130 phr时，掺杂纤维使导电橡胶的体积电阻率从1010Ω·cm降至1.4Ω·cm；当总颗粒填充量为240 phr时，在1.0~2.5 GHz的频段内，其屏蔽效能在90 dB以上，而未经过掺杂的仅能超过60 dB。利用面心立方堆垛结构模型计算颗粒间最小距离，结果发现导电橡胶的渗流阈值与颗粒最小间距有较为明显的相关性。
위감소구형Ni/Al전충량병제고Ni/Al전충도전규상효병폐효능，선취Ni/C섬유가입도차충도전상효중，병종도전성、병폐성능방면대기진행평개。실험발현 Ni/C 섬유적참잡가이제고도전상효적도전성급병폐성능。당총과립전충량위130 phr시，참잡섬유사도전상효적체적전조솔종1010Ω·cm강지1.4Ω·cm；당총과립전충량위240 phr시，재1.0~2.5 GHz적빈단내，기병폐효능재90 dB이상，이미경과참잡적부능초과60 dB。이용면심립방퇴타결구모형계산과립간최소거리，결과발현도전상효적삼류역치여과립최소간거유교위명현적상관성。
In order to reduce the filling content of spherical Ni/Al grain and to improve the shielding effectiveness of the Ni/Al type conductive silicone rubber, Ni/C fiber was selected to be added into the conductive rubber, and the electrical conductivity and shielding performance of the rubber were evaluated. The results show that the rubber added Ni/C fiber can effectively improve the conductivity and shielding performance. When the total quantity of Ni/C and Ni/Al is 130 phr, the volume resistivity of the rubber decreases from 1010Ω·cm to 1.4Ω·cm. When the total quantity of Ni/C and Ni/Al is 240 phr, the shielding effectiveness of the rubber could be more than 90 dB within 1.0-2.5 GHz band, and the shielding effectiveness of the rubber without doping is just more than 60 dB. Furthermore, uniform face-centered cubic close structure model was used to calculate the minimum distance between particles, and the results show that there are certain connections between percolation thresholds of the rubber and the minimum distance between particles.