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《Rare Metal Materials and Engineering》 2010-07
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Electromagnetic Shielding Behavior of Composites Containing Ultrafine Ni Fibers

Gong Chunhong,Zhang Yu,Yan Chao,Gao Minjie,Wu Zhishen,Zhang Zhijun (Henan University,Kaifeng 475004,China)  
With induction of external magnetic fields,ultrafine Ni fibers with length up to 100 μm and diameter of about 250 nm were fabricated by a liquid phase reduction method under normal pressure. Then the obtained Ni fibers and commercial microsized Ni powder were used as filler to fabricate resin-based conductive composites,respectively. The electromagnetic shielding effectiveness (SE) of the resultant resin-based conductive composites was measured as a function of nickel content in the frequency range from 130 MHz to 1.5 GHz. Results indicate that compared with the composite with microsized Ni powder,the resin-based composite with ultrafine Ni fibers shows better electromagnetic shielding effectiveness. The composite with 33.3% (mass fraction) Ni fibers possesses an average SE of 15.7 dB.
【Fund】: 国家重点基础研究发展规划“973”计划(2007CB607606);; 国家自然科学基金项目(50902045/E0213)资助
【CateGory Index】: TB332
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