Shi Sui-Lin, Liang Ji
Department of Mechanical Engineering, Tsinghua University, Beijing 100084, People's Republic of China.
Nanotechnology. 2008 Jun 25;19(25):255707. doi: 10.1088/0957-4484/19/25/255707. Epub 2008 May 15.
Multi-wall carbon nanotubes (MWCNTs)-3 mol% yttria-stabilized zirconia (3Y-TZP) (MWCNTs-3Y-TZP) composite was prepared by spark plasma sintering. The complex permittivities of the composite have been measured in the Ku-band range (12.4-18 GHz) and it is found that both the real and imaginary permittivities of the composite increase with the increasing content of MWCNTs. The effect of the content of MWCNTs on the electromagnetic interference (EMI) shielding effectiveness (SE) of the composite has been evaluated, and it is found that the EMI SE of the composite increases with the increasing content of MWCNTs. An EMI SE value as high as 25-30 dB has been achieved in the Ku-band range for the composite with 9 wt% content of MWCNTs, indicating that the MWCNTs-3Y-TZP composite can be used as an effective EMI shielding material.
通过放电等离子烧结制备了多壁碳纳米管（MWCNTs）-3摩尔%氧化钇稳定氧化锆（3Y-TZP）（MWCNTs-3Y-TZP）复合材料。已在Ku波段范围（12.4 - 18 GHz）测量了该复合材料的复介电常数，发现复合材料的实介电常数和虚介电常数均随MWCNTs含量的增加而增大。评估了MWCNTs含量对复合材料电磁干扰（EMI）屏蔽效能（SE）的影响，发现复合材料的EMI SE随MWCNTs含量的增加而增大。对于MWCNTs含量为9 wt%的复合材料，在Ku波段范围内已实现高达25 - 30 dB的EMI SE值，表明MWCNTs-3Y-TZP复合材料可作为一种有效的EMI屏蔽材料。
