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首页> 外文期刊>RSC Advances >High-efficiency and dynamic stable electromagnetic wave attenuation for La doped bismuth ferrite at elevated temperature and gigahertz frequency
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High-efficiency and dynamic stable electromagnetic wave attenuation for La doped bismuth ferrite at elevated temperature and gigahertz frequency

机译：La掺杂铋铁氧体在高温和千兆赫兹频率下的高效且动态稳定的电磁波衰减

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摘要

The immense potential of electromagnetic wave attenuation materials for applications in harsh dynamic environment has propelled much recent research and development. Here, we present the original observations on high-temperature electromagnetic properties and attenuation behavior of Bi0.8La0.2FeO3 at 323-673 K. Bi0.8La0.2FeO3 exhibits high-efficiency and stable attenuation at dynamic temperature and frequency conditions. With the increase of temperature, the attenuation capacity enhances, where the minimum reflection loss is less than -10 dB from 323 K to 673 K, and the best reflection loss reaches -54 dB at 573 K, which is 2.7 times that of BiFeO3. With changing frequency, the effective reflection loss (<= -10 dB) almost covers 3 GHz in the full temperature range. The excellent attenuation capacity of Bi0.8La0.2FeO3 is attributed to the crystal structure and electron structure due to the substitution of La, which enhances conductivity and natural ferromagnetic resonance, resulting in the enhancement of electromagnetic properties and improvement of electrical-magnetic synergy at elevated temperature. This work highlights the bismuth ferrite family as promising high-efficiency and stable electromagnetic wave attenuation materials.
机译：电磁波衰减材料在恶劣的动态环境中的巨大应用潜力推动了最近的研究和开发。在这里，我们提出Bi0.8La0.2FeO3在323-673 K时的高温电磁特性和衰减行为的原始观察结果。Bi0.8La0.2FeO3在动态温度和频率条件下表现出高效且稳定的衰减。随着温度的升高，衰减能力增强，从323 K到673 K，最小反射损耗小于-10 dB，在573 K时，最佳反射损耗达到-54 dB，是BiFeO3的2.7倍。随着频率的变化，有效反射损耗（<= -10 dB）在整个温度范围内几乎覆盖3 GHz。 Bi0.8La0.2FeO3的优异衰减能力归因于La的取代导致的晶体结构和电子结构，从而增强了电导率和自然铁磁共振，从而提高了电磁性能，并在高温下改善了电磁协同作用。温度。这项工作强调了铋铁氧体家族是有前途的高效，稳定的电磁波衰减材料。

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