摘要
采用粉末冶金发泡法制备闭孔泡沫铝,通过调整发泡剂含量、发泡温度、粘度、保温时间等手段,制得孔隙率可调、孔洞分布均匀的闭孔泡沫铝样品,并测试了不同孔隙率、孔径泡沫铝样品的电磁屏蔽性能。结果表明:在100～1000MHz内,泡沫铝的电磁屏蔽性能在60～90dB之间,且随着孔隙率、孔径的增加,泡沫铝的电磁屏蔽性能下降。
Aluminum alloy foams are prepared by powder metallurgical method. The structure of aluminum alloy foams can be controlled by process parameters(the amount of foaming agent, heating temperature, melting time etc). The electromagnetic shielding effectiveness of aluminum alloy foam was measured as a function of cell size and porosity. The results show that the aluminum alloy foam exhibits high shielding effectiveness(from 65 to 90dB) when the frequency is between 100 and 1000MHz. The electromagnetic shielding effectiveness of aluminum alloy foams decreases with the increase of porosity and cell size.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2004年第1期33-36,共4页
The Chinese Journal of Nonferrous Metals
关键词
闭孔泡沫铝
孔隙率
孔径
电磁屏蔽
粉末冶金
closed-cell aluminum alloy foam
porosity
cell size
electromagnetic shielding effectiveness
