Nano-scale and micron-scale manganese dioxide vs corresponding paraffin composites for electromagnetic interference shielding and microwave absorption
Nano-scale and micron-scale manganese dioxide vs corresponding paraffin composites for electromagnetic interference shielding and microwave absorption
复制标题
纳米级和微米级二氧化锰与相应石蜡复合材料的电磁干扰屏蔽和微波吸收
DOI：
10.1016/j.materresbull.2013.12.042
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发表时间：
2014
影响因子：
5.4
通讯作者：
Fan Li-Zhen
中科院分区：
文献类型：
--
作者：
Song Wei-Li;Cao Mao-Sheng;Qiao Bei-Bei;Hou Zhi-Ling;Lu Ming-Ming;Wang Chan-Yuan;Yuan Jie;Liu Dong-Ni;Fan Li-Zhen
采用水热法合成了β-二氧化锰（β-MnO 2）纳米棒。由纳米级β-MnO 2棒和商业微米级β-MnO 2颗粒制成的纯块体样品在介电常数、电磁干扰屏蔽和微波吸收方面表现出相似的性能。与微米级MnO 2颗粒相比，β-MnO 2纳米棒嵌入蜡基复合材料在介电常数、电磁屏蔽和微波吸收方面表现出更大的差异。结果表明，纯MnO 2材料具有良好的电磁屏蔽性能，β-MnO 2纳米棒复合材料具有最高的微波吸收性能。电导率与尺寸效应的耦合被认为是介电常数变化、电磁干扰屏蔽和微波吸收的最重要的作用。讨论了与反射和吸收有关的机理。研究结果为设计和制备高性能电磁屏蔽和吸波材料提供了潜在的策略。
The hydrothermal method was utilized to synthesize beta-manganese dioxide (β-MnO2) nanorods. Both the neat bulk samples fabricated from the nano-scale β-MnO2rods and commercial micron-scale β-MnO2particles exhibited similar performance in permittivity, electromagnetic interference shielding and microwave absorption. The wax-based composites embedded with the as-prepared β-MnO2nanorods exhibited greater differences in permittivity, electromagnetic interference shielding and microwave absorption, compared to those embedded with the commercial micron-scale MnO2particles. The results suggest that neat MnO2materials are effective in electromagnetic interference shielding and the composites with β-MnO2nanorods present the highest microwave absorption. Electrical conductivity coupled with size effects was considered as the most significant roles in the variations of permittivity, electromagnetic interference shielding and microwave absorption. The related mechanism associated with reflection and absorption has been discussed. The results have provided potential strategies for designing and achieving high-performance electromagnetic interference shielding and microwave absorbing materials.