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Engineering A-site cation deficiency into LaCoO3 thin sheets for improved microwave absorption performance

  • Ceramics
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Abstract

Rationally designing microwave absorption materials with highly efficient and tunable bandwidth is in great demand but remains a huge challenge. In this study, perovskite oxide LaCoO3 thin sheets have been obtained by the hydrothermal synthesis and subsequent annealing process. Then, cation deficiency is introduced to the A-site of LaCoO3 via a selectively etching strategy by FeCl3 solution. The phase characteristics, morphologies, structures, and microwave absorption performance of LaCoO3 thin sheets with A-site cation deficiency have been systematically investigated. The results indicate that a suitable introduction of the A-site cation deficiency is beneficial to induce more dipole polarization, leading to the enhancement of the microwave absorption performance. When the amount of FeCl3 is 0.3 g, the LaCoO3 thin sheets exhibited superior reflection loss characteristics in the range of test frequency. Exhilaratingly, a minimum reflection loss (RL) value of − 56.9 dB at 15.1 GHz can be achieved with a thin thickness of 2.0 mm. Meanwhile, a broad effective absorption bandwidth reaches 5.9 GHz, covering the range of 12.1–18.0 GHz. It is believed that introducing the A-site cation deficiency of LaCoO3 can be used as an effective means for tuning microwave absorption.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (51602116, 11904116), Natural Science Foundation of Anhui Province (1708085QB40, 1908085QA36), and Postdoctoral Research Foundation of China (2016M600492).

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Authors and Affiliations

  1. Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, School of Physics and Electronic Information, Huaibei Normal University, Huaibei, 235000, People’s Republic of China

    Yingrui Feng, Kang Hu, Min Zhang, Xiangkai Kong & Qiangchun Liu

  2. High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, 230031, People’s Republic of China

    Wei Ding & Zhigao Sheng

  3. Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, People’s Republic of China

    Wei Ding

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  1. Yingrui Feng
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Feng, Y., Hu, K., Zhang, M. et al. Engineering A-site cation deficiency into LaCoO3 thin sheets for improved microwave absorption performance. J Mater Sci 57, 204–216 (2022). https://doi.org/10.1007/s10853-021-06650-2

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