Fabrication method, dielectric properties, and electromagnetic absorption performance of high alumina fly ash-based ceramic composites
文献类型：期刊论文
| 作者 | Ayeni, Joshua Olatunji2,3,4,5; Ma, Shuhua3,4,5; Wang, Xiaohui3,4,5; Hou, Xuan1,3,4,5 |
| 刊名 | CERAMICS INTERNATIONAL
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 48期号:15页码:21268-21282 |
| ISSN号 | 0272-8842 |
| 关键词 | Fly ash Sintering Mullite-Al 2 O 3-SiC composites Dielectric properties EM absorption Performance |
| DOI | 10.1016/j.ceramint.2022.04.063 |
| 英文摘要 | Mullite-Al2O3-SiC composites were in-situ synthesized through carbothermal reduction reaction of fly ash (FA) with a high alumina content and activated carbon (AC). The effects of sintering temperature, holding time, and amount of AC on the beta-SiC yield, microstructure, dielectric properties, and electromagnetic (EM) absorption performance of the composites in the 2-18 GHz frequency range were studied. The results show that increasing the AC improves the porosities of the composites, with the highest porosity of 56.17% observed. The beta-SiC yield varies considerably as the sintering parameters were altered, with a maximum yield of 23% achieved under conditions of 12 wt% AC, 1400 degrees C sintering temperature, and 3 h holding time. With a thickness of 3.5 mm, this composite has excellent EM absorption performance, exhibiting a minimum reflection loss (RLmin) of -51.55 dB at 7.60 GHz. Significantly, the maximum effective absorption bandwidth (EAB) reaches 3.39 GHz when the thickness is 3.0 mm. These results demonstrate that the composite prepared under ideal conditions can absorb 99.99% of the waves passing through it. Because of the interfacial polarization, conductive loss, and impedance matching of the heterostructure, the synthesized mullite-Al2O3-SiC composites with densities ranging from 1.43 g/cm3 to 1.62 g/cm3 demonstrate outstanding EM attenuation capabilities. Therefore, this study presents a remarkable way of utilizing fly ash to fabricate inexpensive, functional ceramic materials for EM absorption applications. |
| WOS关键词 | MICROWAVE-ABSORPTION ; WAVE ABSORPTION ; SIOC CERAMICS ; RELAXATION ; MATRICES |
| 资助项目 | Beijing Natural Science Foundation[2222079] ; Ningxia Hui Autonomous Region?s Key Research and Development Plan[2021BEE02019] ; Ningxia Hui Autonomous Region?s Key Research and Development Plan[2021010401] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000818541500001 |
| 资助机构 | Beijing Natural Science Foundation ; Ningxia Hui Autonomous Region?s Key Research and Development Plan |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/54071]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Ma, Shuhua |
| 作者单位 | 1.China Univ Min & Technol Beijing, Beijing 100083, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China 5.Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Reso, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ayeni, Joshua Olatunji,Ma, Shuhua,Wang, Xiaohui,et al. Fabrication method, dielectric properties, and electromagnetic absorption performance of high alumina fly ash-based ceramic composites[J]. CERAMICS INTERNATIONAL,2022,48(15):21268-21282. |
| APA | Ayeni, Joshua Olatunji,Ma, Shuhua,Wang, Xiaohui,&Hou, Xuan.(2022).Fabrication method, dielectric properties, and electromagnetic absorption performance of high alumina fly ash-based ceramic composites.CERAMICS INTERNATIONAL,48(15),21268-21282. |
| MLA | Ayeni, Joshua Olatunji,et al."Fabrication method, dielectric properties, and electromagnetic absorption performance of high alumina fly ash-based ceramic composites".CERAMICS INTERNATIONAL 48.15(2022):21268-21282. |
入库方式： OAI收割
来源：过程工程研究所
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