【作者】 刘顺华； 管洪涛； 段玉平； 杜纪柱；

【Author】 LIU Shun-hua, GUAN Hong-tao, DUAN Yu-Ping, DU Ji-zhu (School of Materials Science & Engineering, Dalian University of Technology, Dalian 116024, China)

【机构】 大连理工大学材料科学与工程学院；

【摘要】 本文从阻抗匹配和能量守恒的角度讨论和分析了水泥基体中添加发泡聚苯乙烯(EPS)颗粒透波材料对材料吸波性能的影响。采用EPS表面处理工艺提高了EPS颗粒在水泥基体中的分散均匀性,分析了EPS 水泥复合材料的微波损耗机理,并结合能量守恒原理考察了EPS填充率、EPS颗粒直径以及试样厚度对材料吸波性能的影响．结果显示,EPS填充水泥复合材料具有较好的吸波性能。其吸波性能随EPS填充率的增加而逐渐增大,然后随EPS的继续增加吸波性能下降。8- 18 GHz频段内,EPS颗粒直径为2mm时,EPS填充率 60％(体积分数)、厚度为20mm的试样吸波性能可达到-10--15dB,吸收优于-10dB的工作带宽达6．2 GHz。EPS颗粒直径为4mm时,EPS填充率40％(体积分数)、厚度为20mm的试样吸波性能可达到-12- -20dB,吸收优于-15dB的工作带宽达6．8GHz。更多还原

【Abstract】 In this paper, the absorbing property of cement based absorbing material packed with EPS (Expanded polystyrene) beads was researched by the theories of impedance match and energy conservation. The disperse uniformity of EPS in cement was improved by special surface treatment technology of EPS. The microwave loss mechanism of this absorbing material was analyzed and the influences of EPS filling patio, EPS bead diameter and sample thickness to absorbing property were analyzed by energy conservation principle. The results show that the cement based material filling with EPS has good absorbing property, and the absorbing property firstly increases with the increase of EPS filling ratio and then decreases. In the frequencies 8-18 GHz, when EPS diameter is 2mm, the absorbing property of sample filling with 60 vol% EPS with the thickness of 20mm can reach -10--15 dB and the band width lower than - 10dB can reach 6.2 GHz; when EPS diameter is 4mm, the absorbing property of sample filling with 40 vol% EPS with the thickness of 20mm can reach -12--20dB and the band width lower than - 15dB can reach 6.8 GHz.更多还原