材料科学
反射损耗
复合材料
介电损耗
电导率
微电子
纳米复合材料
锰
吸收(声学)
阻抗匹配
电介质
电磁学
光电子学
复合数
电阻抗
电子工程
电气工程
冶金
物理化学
工程类
化学
作者
Yue Liu,Zirui Jia,Qianqian Zhan,Yuhao Dong,Qingyu Xu,Guanglei Wu
出处
期刊:Nano Research
[Springer Nature]
日期:2022-03-29
卷期号:15 (6): 5590-5600
被引量:96
标识
DOI:10.1007/s12274-022-4287-5
摘要
The weak dielectric properties and the lack of magnetic loss of manganese-based absorbers are obstructed as the new generation of electromagnetic wave absorption (EMA) materials applying in microelectronic devices. Herein, the sulfuration and subsequent compounding strategies have been employed to enhance the EMA performance of multi-shell nanosphere-shaped Mn2O3 materials. With the narrow bandgap, the as-obtained MnS possesses reinforced electrical conductivity, which is conducive to conductivity loss. More importantly, the presence of potential difference between different phases will form space charge region at the heterogeneous interface, thus favoring interfacial polarization. Additionally, the improvement of magnetic loss is attributed to the presence of Co3O4 nanoparticles. Consequently, the composites present enhanced EMA performance than original Mn2O3. Specifically, the minimum reflection loss of as-prepared composites is −51.4 dB at the thickness of 1.8 mm and the broad effective absorption bandwidth reaches 6.2 GHz at 1.9 mm. The low matching thickness and high absorption efficiency in this work can provide a convincing reference when designing distinguished manganese-based absorbers.
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