| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Effects of Preparation Time on Absorbing Property of CIPs/Fe3O4 |
| ZHOU Yingying1,2, ZHOU Wancheng1, YE Mengyuan2, XIE Hui2
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1 School of Materials, Northwestern Polytechnical University, Xi'an 710072, China
2 School of Materials Engineering, Xi'an Aeronautical University, Xi'an 710077, China |
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Abstract In this paper, CIPs/Fe3O4 composite materials with enhanced microwave absorption properties were prepared by surface flexible oxidation technology. The raw CIPs and CIPs/Fe3O4composites samples were tested and analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and vector network analyzer, respectively. The effects of different oxidation time on the microstructure, composition and chemical state of elements, electromagnetic properties and absorbing properties of CIPs/Fe3O4 composites were studied. The simulated reflectance results show that the absorption efficiency of CIPs/Fe3O4 composite is higher than the property of the raw CIPs. When the reaction time is 90 min, the minimum absorption value of CIPs/Fe3O4 composite is -29.6 dB at the thickness of 1.8 mm and the minimum absorption value of raw CIPs is -24.1 dB at the same thickness. Moreover, with -20 dB as the scale, the microwave absorbing bandwidth of the raw CIPs is 1.5 GHz and the bandwidth of CIPs/Fe3O4 composite is 1.7 GHz when the reaction time is 90 min. It shows that the absorption efficiency and microwave absorbing bandwidth of CIPs can be improved by surface oxidation technology.
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Published: 26 April 2020
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51701148) and Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices (2015szsj-59-1). |
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Corresponding Authors:
Yingying Zhoureceived her Ph.D. degree in mate-rials in June 2016 from Northwestern Polytechnical University. She is a researcher for post-doctoral research in Northwestern Polytechnical University. Meanwhile, she is currently an associate professor in Xi'an Aeronautical University. Her research interests are preparation and characterization of magnetic absorbers.
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| About author:: Wancheng Zhou,professor and Ph.D. supervisor at the School of Materials, Northwestern Polytechnical University. He received his Bachelor, Master and Ph.D. degree in materials from Northwestern Polytechnical University (NWPU) in 1981, 1985 and 1990. In August 1993, he finished his post-doctoral research at Iowa State University, USA. From 1999 to 2001, he was a visiting professor at the University of Missouri-Rolla, USA. He obtained the first-class for National Scientific and Technological Progress once, the second-class for State Technological Invention Award once and the first-class for Provincial and Ministerial Awards for Scientific and Technological Achievements twice. More than 50 national invention patents or national defense patents were authorized. In recent years, he has published more than 300 research papers in journals such as Journal of American Chemical Society. |
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2020, Vol. 34 
