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Improvement on Microwave Absorption Property of Tetrapod-shaped ZnO Whiskers
Author(s): 
Pages: 57
Year: Issue:  1
Journal: Safety & EMC

Keyword:  T-ZnO晶须化学气相沉积电磁性能;
Abstract: 采用化学气相沉积的方法制备了铁包覆四角状氧化锌(T-ZnO)晶须的复合粉体.使用X射线衍射分析仪(XRD)进行了物相分析,用扫描电镜(SEM)观察了粉体的形貌,并运用能谱仪(EDS)进行了成分分析.结果表明,通过化学气相法进行表面包覆处理的晶须,外观形貌仍保持四针状结构,包覆层为单质铁.对复合粉体的电磁参数测试表明,改性晶须的磁性能明显增强,磁导率(μ')在1.0~1.8之间,磁损耗(μ")在0.3~0.5之间;通过反射率曲线模拟发现,在8 GHz点反射率可达-21 dB,吸收频率的峰值向低频移动,这样有利于拓宽吸收频带.
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