Fabrication and microwave absorption properties of myrica rubra-like Fe3O4@SnO2 core-shell material
Against the background of the widespread application of various electronic devices and communication technologies, there is great concern regarding the problem of excessive radiation of electromagnetic waves with regard to electromagnetic interference, environmental pollution, and human health. Micr...
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Science Press
2020-05-01
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| Series: | 工程科学学报 |
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| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2019.05.05.001 |
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| author | Wei HUANG Yu-jiang WANG Shi-cheng WEI yi LIANG bo WANG Yu-wei HUANG Bin-shi XU |
| author_facet | Wei HUANG Yu-jiang WANG Shi-cheng WEI yi LIANG bo WANG Yu-wei HUANG Bin-shi XU |
| author_sort | Wei HUANG |
| collection | DOAJ |
| description | Against the background of the widespread application of various electronic devices and communication technologies, there is great concern regarding the problem of excessive radiation of electromagnetic waves with regard to electromagnetic interference, environmental pollution, and human health. Microwave-absorbing materials (MAMs) can transform electromagnetic energy into heat or dissipate electromagnetic waves via interference. Numerous theoretical and experimental studies have focused on the prevention of electromagnetic pollution and other related problems. Magnetite (Fe3O4) is considered one of the most promising MAMs because of its excellent properties, such as high saturation magnetization, high Curie temperature, and low cost. However, the single Fe3O4 has the disadvantages of weak dielectric loss and easy oxidation, thereby limiting its application in the field of microwave absorption. Fabrication of Fe3O4-based nanocomposites is an effective solution for these problems. In this study, a new type of Fe3O4@SnO2 composite similar to myrica rubra (Chinese bayberry) was synthesized by the Stöber method and hydrothermal method using magnetic Fe3O4 microspheres as template. The phase structure, surface elements, micromorphology, magnetic properties, and microwave absorption properties of the samples were characterized by means of X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy and by observations based on a vibrating-sample magnetometer and vector network analyzer. The results show that the diameter of the myrica rubra-like Fe3O4@SnO2 sphere is about 500 nm, without obvious agglomeration, and that it has good morphological uniformity. The SnO2 layer is composed of nano-SnO2 particles, which are loosely stacked. The layer possesses many porous structures and is about 40 nm thick. The myrica rubra-like Fe3O4@SnO2 has strong dielectric loss capacity, is conducive to improving impedance matching performance, and exhibits good electromagnetic wave absorption capacity. When the thickness is 1.4–2.8 mm, RL(min) exceeds −20 dB. The optimum thickness is 1.7 mm, RL(min) is −29 dB, and the effective bandwidth is 4.9 GHz (13.1–18 GHz). It is a potential-absorbing material. |
| format | Article |
| id | doaj-art-01675344d4f24ed8a609a0209954478d |
| institution | OA Journals |
| issn | 2095-9389 |
| language | zho |
| publishDate | 2020-05-01 |
| publisher | Science Press |
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| series | 工程科学学报 |
| spelling | doaj-art-01675344d4f24ed8a609a0209954478d2025-08-20T01:47:42ZzhoScience Press工程科学学报2095-93892020-05-0142563564410.13374/j.issn2095-9389.2019.05.05.001190505-0001Fabrication and microwave absorption properties of myrica rubra-like Fe3O4@SnO2 core-shell materialWei HUANG0Yu-jiang WANG1Shi-cheng WEI2yi LIANG3bo WANG4Yu-wei HUANG5Bin-shi XU6National Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, ChinaNational Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing 100072, ChinaAgainst the background of the widespread application of various electronic devices and communication technologies, there is great concern regarding the problem of excessive radiation of electromagnetic waves with regard to electromagnetic interference, environmental pollution, and human health. Microwave-absorbing materials (MAMs) can transform electromagnetic energy into heat or dissipate electromagnetic waves via interference. Numerous theoretical and experimental studies have focused on the prevention of electromagnetic pollution and other related problems. Magnetite (Fe3O4) is considered one of the most promising MAMs because of its excellent properties, such as high saturation magnetization, high Curie temperature, and low cost. However, the single Fe3O4 has the disadvantages of weak dielectric loss and easy oxidation, thereby limiting its application in the field of microwave absorption. Fabrication of Fe3O4-based nanocomposites is an effective solution for these problems. In this study, a new type of Fe3O4@SnO2 composite similar to myrica rubra (Chinese bayberry) was synthesized by the Stöber method and hydrothermal method using magnetic Fe3O4 microspheres as template. The phase structure, surface elements, micromorphology, magnetic properties, and microwave absorption properties of the samples were characterized by means of X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy and by observations based on a vibrating-sample magnetometer and vector network analyzer. The results show that the diameter of the myrica rubra-like Fe3O4@SnO2 sphere is about 500 nm, without obvious agglomeration, and that it has good morphological uniformity. The SnO2 layer is composed of nano-SnO2 particles, which are loosely stacked. The layer possesses many porous structures and is about 40 nm thick. The myrica rubra-like Fe3O4@SnO2 has strong dielectric loss capacity, is conducive to improving impedance matching performance, and exhibits good electromagnetic wave absorption capacity. When the thickness is 1.4–2.8 mm, RL(min) exceeds −20 dB. The optimum thickness is 1.7 mm, RL(min) is −29 dB, and the effective bandwidth is 4.9 GHz (13.1–18 GHz). It is a potential-absorbing material.http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2019.05.05.001fe3o4@sno2core-shellcompositesmyrica rubra-likemicrowave absorption |
| spellingShingle | Wei HUANG Yu-jiang WANG Shi-cheng WEI yi LIANG bo WANG Yu-wei HUANG Bin-shi XU Fabrication and microwave absorption properties of myrica rubra-like Fe3O4@SnO2 core-shell material 工程科学学报 fe3o4@sno2 core-shell composites myrica rubra-like microwave absorption |
| title | Fabrication and microwave absorption properties of myrica rubra-like Fe3O4@SnO2 core-shell material |
| title_full | Fabrication and microwave absorption properties of myrica rubra-like Fe3O4@SnO2 core-shell material |
| title_fullStr | Fabrication and microwave absorption properties of myrica rubra-like Fe3O4@SnO2 core-shell material |
| title_full_unstemmed | Fabrication and microwave absorption properties of myrica rubra-like Fe3O4@SnO2 core-shell material |
| title_short | Fabrication and microwave absorption properties of myrica rubra-like Fe3O4@SnO2 core-shell material |
| title_sort | fabrication and microwave absorption properties of myrica rubra like fe3o4 sno2 core shell material |
| topic | fe3o4@sno2 core-shell composites myrica rubra-like microwave absorption |
| url | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2019.05.05.001 |
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