Electromagnetic Shielding Effectiveness of Cement-matrix Composite Containing Nickel Fiber

摘要：

The cement-matrix composite with the function of building structure and electromagnetic interference shielding was prepared by filling nickel fiber into cement. The dispersion of nickel fiber in cement-matrix composite and the shielding effectiveness of composite containing various volume fractions of nickel fiber were investgated in this paper. The electromagnetic interference shielding effectiveness in the frequency range of 0.1 MHz to 1.5 GHz and the conductivity of composite were measured by coaxial cable method and two-probe method,respectively. The dispersion of nickel fiber in cement was characterized by EPMA. The results indicated that the dispersion property of nickel fiber by sodium hexametaphosphatecan was better than sodium carboxymethylcellulose. The optimum contents of nickel fiber in composite was 5 voL％,the maximum shielding effectiveness was 45.7 dB in 140 MHz and the minimum shielding effectiveness was 36 dB in 1240 MHz. The shielding effectiveness of composite with 7 vol.％ nickel fiber was lower than that with 5 vol.％ nickel fiber due to the tendency of nickel fiber cling to each other.

关键词： Electromagnetic shielding Cement-matrix Composites Nickel fiber

作者: Liujun Luo Guoxuan Xiomg Shufang Zheng Min Deng

作者单位: Key Laboratory of Radioactive Geology and Exploration Technology Fundamental Science for National De Key Laboratory of Radioactive Geology and Exploration Technology Fundamental Science for National De Nanjing University of Technology Nanjing 210009 China

会议类型: 国际会议

会议名称: Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)

会议地点: 南昌

会议语种:英文

页码: 570-573

在线出版日期: 2010-04-28（万方平台首次上网日期，不代表论文的发表时间）