Microwave absorbing properties of double-layer cementitious composites containing Mn-Zn ferrite

被引：100
作者：
Zhang, Xiuzhi [1 ,2 ]
Sun, Wei [1 ,2 ]
机构：
[1] Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Peoples R China
[2] Jiangsu Key Lab Construct Mat, Nanjing 211189, Peoples R China
来源：
CEMENT & CONCRETE COMPOSITES | 2010年 / 32卷 / 09期
关键词：
Layered cementitious composites; Impedance matching; Microwave absorption; Reflectivity; Ferrite; ELECTROMAGNETIC-INTERFERENCE; CARBONYL-IRON; ADMIXTURE; DESIGN;
D O I：
10.1016/j.cemconcomp.2010.07.013
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Double-layer cementitious composites filled with Mn-Zn ferrite as microwave absorbers were designed based on the impedance matching theory and electromagnetic wave propagation laws. The results showed that the addition of silica fume can improve the impedance matching between the cementitious composites and free space. Comparing with the single-layer structure, the reflectivity of the double-layer cementitious plates can decrease by 6-8 dB and decrease by 15 dB maximum with 30 wt.% ferrite; in addition, the reflectivity of electromagnetic wave is lower than 10 dB in the frequency range of 11.4-18 GHz. These composites can be potentially used as electromagnetic interference (EMI) materials for buildings. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：726 / 730
页数：5
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