Abstract
Hydrothermal synthesis between (NH 4)2S 2O 8 and MnSO 4 was carried out to investigate the structure, morphology, and electromagnetic properties of Ni-doped MnO 2 with different doping amounts. The samples were characterized by X-ray powder diffraction (XRD), X-ray fluorescence spectrometry (XRF), scanning electron microscopy (SEM), and vector network analysis. The analysis results revealed that all the final products were α-MnO 2 and few amounts of γ-MnO 2, and the morphology changed obviously with the increase of the Ni doping amount. The doping of Ni had a certain effect on the electromagnetic properties, and some other properties derived from electromagnetic performances were also investigated, such as dielectric and magnetic loss tangent and microwave-absorbing properties. All the reflection loss (RL) peaks of the final products were moving toward lower frequency with increasing thickness, and with the thickness of 2 mm, the final products all had the maximum effective absorption bandwidth (RL < −10 dB), and the Ni-doped MnO 2 had better reflection loss performance than the undoped MnO 2 in the range of high frequency.
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Acknowledgments
The authors acknowledge the support by Program for New Century Excellent Talents in University (No. NCET-13-0071), the National Science and Technology support plan for twelfth five years of China (No: 2012BAJ02B04), the Fundamental Research Funds for the Central Universities (DUT14YQ201), and the Natural Science Foundation of Liaoning Province (No. 2013020098).
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Duan, Y., Chen, J., Zhang, Y. et al. Structure, Morphology, and Electromagnetic Properties of Manganese Dioxide with Ni Doping. J Supercond Nov Magn 27, 2139–2146 (2014). https://doi.org/10.1007/s10948-014-2568-2
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DOI: https://doi.org/10.1007/s10948-014-2568-2