Electromagnetic and microwave absorption performance of some transition metal doped La<sub>0.7sub>Sr<sub>0.3sub>Mn<sub>1鈭?span style='font-style: italic'>xsub>TM<sub>xsub>O<sub>3卤未sub> (TM = Fe, Co or Ni)
- 作者：Shuyuan Zhang<sup> ; sup><sup>ZSY07058079@163.comsup> ; Quanxi Cao
- 关键词：Transition metal doped La0.7Sr0.3MnO3± ; 未 ; Electromagnetic parameters ; Microwave absorption performance
- 刊名：Materials Science and Engineering ; B
- 出版年：2012
- 期刊代码：76_09215107
- 类别：ch
- 出版时间：25 May, 2012
- 卷：177
- 期：9
- 页码：678-684
- 文件大小：1346 K
摘要
In this study the transition metal doped La<sub>0.7sub>Sr<sub>0.3sub>Mn<sub>1鈭?em>xsub>TM<sub>xsub>O<sub>3卤未sub> (TM = Fe, Co or Ni, x = 0, 0.2) powders were fabricated by the conventional solid state reaction method. The compositions, morphologies and crystal structures were characterized using different method. The influences of the incorporation of TM into La<sub>0.7sub>Sr<sub>0.3sub>MnO<sub>3卤未sub> on the complex permittivity, complex permeability and microwave absorption performance were investigated in the range of 5.85-18 GHz. It is found that the electromagnetic loss has been enhanced after TM doping. And the microwave absorption properties have been significantly improved. In present study La<sub>0.7sub>Sr<sub>0.3sub>Mn<sub>0.8sub>Fe<sub>0.2sub>O<sub>3卤未sub> had the best microwave absorption properties. The maximum reflection loss was 27.67 dB at 10.97 GHz, and the absorbing bandwidth above 6 dB was 6.80 GHz with 2 mm thickness.