【摘要】 本文研究了电磁波屏蔽材料Ｎｉ／聚乙烯复合材料在５０ＭＨｚ～１ＧＨｚ频率范围内的复介电常数。结果表明，Ｎｉ粉含量小于７０％（质量分数），频率和成分对介电常数ε′的影响很小，Ｎｉ含量大于７０％（质量分数）时，在不同频率范围内，成分对ε′的影响不同。Ｎｉ粉含量小于８０％（质量分数），频率和成分对ε″的影响很小，Ｎｉ粉含量大于８０％（质量分数），ε″随成分的增加急剧上升，随频率的增加下降更多还原

【Abstract】 This paper studied the complex dielect constant of a shielding material-Ni/polythene composites in the frequency range from 50MHz to 1000MHz. Results showed that when Ni mass content is below 70%,the influence of Ni content and frequency on was very little;When Ni mass content was above 70%,in different frequency range,the Ni content’s influence on was different;When Ni mass content was below 80%,the influence of content and frequency on was not notable;when it was above 80%, raised rapidly with the increase of Ni content,and decreased with the increase of frequency.更多还原