中文摘要：

采用同轴线法研究了纯镁及常见镁合金的电磁屏蔽性能，比较了纯镁、不同系列镁合金与其他金属电磁屏蔽性能的差别。结果表明：纯镁具有良好的电磁屏蔽性能，合金化后，根据合金元素的不同，屏蔽性能有所改变，其中AZ系镁合金具有最高的屏蔽效能。同时讨论了不同材料电磁屏蔽性能差异的原因以及厚度、电导率对电磁屏蔽性能的影响。

英文摘要：

The electromagnetic shielding properties of pure magnesium, magnesium alloys and the difference with other metals were investigated by using the coaxial cable method. The results show that electromagnetic shielding property of pure magnesium is great, and those of magnesium alloys va- ry with the alloy elements. Among magnesium alloys, Mg A1 Zn based alloys are the best for electro- magnetic shielding. The cause of different shielding properties among different materials and the effects of thickness, electric conductivity on electromagnetic shielding property were also discussed.