摘要
采用传统固相法,制备了Dy1-xSrxFeO3(x=0、0.1、0.2、0.3、0.4)粉体,研究了其微波电磁性能。利用X射线衍射技术研究了其结构和相组成。利用扫描电镜观察粉体颗粒微观形貌。利用网络分析仪测试了其2～18GHz的电磁参数,并通过软件对其微波吸收性能进行了模拟,利用紫外-可见-红外分光光度计测量了其在930～1250nm波长区间的反射率。结果表明粉体为钙钛矿结构;当x=0.3,涂层厚度d=2.8mm时,在11GHz处吸收出现峰值,约为-20dB,2～18GHz范围内吸收>-10dB的频宽约为2.9GHz;当x=0.3时,粉末压片在950～1200nm波长区间的红外吸收性能最好,其反射率约为0.05%。
In this paper, Dy1-xSrxFeO3（x = 0, 0.1, 0.2, 0.3, 0.4） were prepared by the conventional souo- state reaction and the microwave magnetic performance were also studied. The phase structure, morphology and particle size of Dy1-xSrxFeO3 powders were characterized by X-ray diffraction and scanning electron microscope. The electromagnetic properties were measured by network analyzer, and then the microwave absorption were calculated using YR computer reflection simulating software. The reflection spectra were measured by spectro- photometer（930-1250nm）. The results show that the powders are perovskite structure, and the reflection loss of single-layer coating （the thickness is 2.8mm） reaches the peak value about -20dB when x=0.3, and the bandwidth （RL≥-10dB） reaches 2. 9GHz, and when x=0. 3, the reflectivity （950-1200nm） reaches to 0. 05%.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2012年第6期736-739,743,共5页
Journal of Functional Materials
基金
总装预研基金资助项目(9140A12060110QT6401)
关键词
吸波材料
钙钛矿
电磁性能
反射损耗
红外吸收
absorbing materials
Perovskite
electromagnetic properties
reflection loss
infrared absorption
