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Excellent microwave absorption performance and wideband response of Pr 1−x Sr x MnO 3 powders fabricated by sol–gel technique
Journal of Sol-Gel Science and Technology ( IF 2.5 ) Pub Date : 2021-01-18 , DOI: 10.1007/s10971-020-05462-1
Yong-he Liu , Shun-kang Pan , Li-chun Cheng , Yu-cheng Chen

Confronting with the increased severe electromagnetic waves pollution, synthesis of perovskite-type oxides, like PrMnO3, microwave-absorbing materials with strong reflection loss (RL) and broad effective absorption bandwidth have attracted extensive attention because of their potential application in all kinds of areas. Herein, Pr1−xSrxMnO3 perovskites with different doping Sr-content were synthesized through the sol–gel strategy. The effects of Sr doping on microstructure and magnetic properties was studied by the corresponding equipment, respectively. Microwave absorption properties were investigated according to the transmission line theory. Simulation studies show that Pr0.9Sr0.1MnO3 sample in a wax matrix exhibits the strongest reflection loss of −50.21 dB at 12.08 GHz at a thickness of 2.5 mm. Its effective absorption bandwidth (RL < −10 dB) is up to 10.4 GHz, ranged from 7.6 to 18 GHz with a thickness of 1.9–3.1 mm. Remarkably, the maximum effective bandwidth of Pr0.95Sr0.05MnO3 power can be reached to 6.96 GHz at 2.5 mm. The results suggest that the Sr addition is beneficial to enhance the absorption performances both in wide bandwidth and excellent microwave absorption. This simple synthesis method can be used as major candidate for designing and fabricating ideal microwave absorber.



中文翻译:

溶胶-凝胶技术制备的Pr 1-x Sr x MnO 3粉末具有优异的微波吸收性能和宽带响应

面对日益严重的电磁波污染,钙钛矿型氧化物如PrMnO 3的合成,具有强反射损耗(RL)和宽有效吸收带宽的微波吸收材料因其在各个领域的潜在应用而受到广泛关注。 。在这里,通过溶胶-凝胶策略合成了具有不同掺杂Sr含量的Pr 1-x Sr x MnO 3钙钛矿。分别通过相应的设备研究了Sr掺杂对组织和磁性能的影响。根据传输线理论研究了微波吸收特性。仿真研究表明Pr 0.9 Sr 0.1蜡基质中的MnO 3样品在厚度为2.5 mm的12.08 GHz处表现出最强的反射损耗,为−50.21 dB。它的有效吸收带宽(RL <−10 dB)高达10.4 GHz,范围为7.6至18 GHz,厚度为1.9–3.1 mm。值得注意的是,在2.5 mm时,Pr 0.95 Sr 0.05 MnO 3功率的最大有效带宽可以达到6.96 GHz。结果表明,Sr的添加有利于在宽带宽和优异的微波吸收方面增强吸收性能。这种简单的合成方法可以用作设计和制造理想微波吸收器的主要候选方法。

更新日期:2021-01-19
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