Piezomagnetic properties and shielding properties of amorphous and nanocrystalline powders / butyl rubber composite films

2010 3rd International Nanoelectronics Conference (INEC) Pub Date : 2010-03-04 DOI:10.1109/INEC.2010.5424766

X. Xu, Zhenghou Zhu, Huizong Song, Zhenzhen Wan, H. Peng, Junfu Huang

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Abstract

The composite films of amorphous and nanocrystalline Fe73.5Cu1Nb3Si13.5B9 powders/butyl rubber were prepared by pressing in the mold to shape. The piezomagnetic properties of composite films were studied in the temperature range of 20–50 Celsius degree with theshielding properties in the frequency band (30kHz–6000MHz) of electromagnetic wave. The results show that when the microstress below 0.09MPa and testing frequency below 200kHz, the piezomagnetic properties are the best and theirs piezomagnetic properties increase as temperatures increase, the piezomagnetic properties of amorphous composite films are the best at 40 Celsius degree. Within frequency band (30kHz–6000MHz) of electromagnetic wave, the films have good characteristics of shielding high-frequency and broad-frequency electromagnetic waves. The shielding properties are improved significantly as the content of powder or the thickness of materials increases. Shielding effectiveness above 15dB is obtained at certain experimental parameters.

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非晶和纳米晶粉末/丁基橡胶复合薄膜的压磁性能和屏蔽性能

采用模压成形的方法制备了非晶和纳米晶Fe73.5Cu1Nb3Si13.5B9粉末/丁基橡胶复合薄膜。研究了复合薄膜在20 ~ 50℃温度范围内的压磁性能，并对电磁波频段(30khz ~ 6000mhz)的屏蔽性能进行了研究。结果表明:当微应力低于0.09MPa，测试频率低于200kHz时，非晶复合膜的压磁性能最好，且随温度升高而升高，其中在40℃时，非晶复合膜的压磁性能最好。在电磁波的频段(30kHz-6000MHz)内，薄膜具有良好的屏蔽高频和宽频电磁波的特性。随着粉末含量的增加或材料厚度的增加，屏蔽性能得到明显改善。在一定的实验参数下，获得了15dB以上的屏蔽效能。

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2010 3rd International Nanoelectronics Conference (INEC)

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