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Carbon fibers with eddy current loss characteristics exhibit different microwave absorption properties in different graphitization states
Dai, Bushi1; Li, Jinyang1; Wang, Weizhen1; Liu, Xiaoguang2; Qi, Yujie1; Qi, Yang1,3
Corresponding AuthorQi, Yang(qiyang@imp.neu.edu.cn)
2020-12-15
Source PublicationMATERIALS LETTERS
ISSN0167-577X
Volume281Pages:4
AbstractThe precursor was prepared by electrospinning method with Polyvinyl alcohol (PVA) as a raw material, and carbon fibers were obtained through pre-oxidation and carbonization process. The results of the experimental confirmed that different graphitization states can cause changes in microwave absorption characteristics. When the carbonization temperature was 650 degrees C, carbon fibers showed excellent microwave absorption characteristics with a minimum reflection loss value of -45.2 dB, under the effect of dielectric loss. When the carbonization temperature was 850 degrees C, carbon fibers showed excellent microwave absorption characteristics with a minimum reflection loss value of -44.4 dB, under the combined effect of eddy current loss and dielectric loss. The interface isomerization of amorphous carbon and graphitized carbon and the defects in amorphous carbon and graphitized carbon can be regarded as polarization centers, which leaded to dielectric loss. Moreover, in terms of structure, the skin effect occurred in the bridged carbon fibers which can cause eddy current loss. (C) 2020 Elsevier B.V. All rights reserved.
KeywordCarbon materials Skin effect Dielectric loss Nanocrystalline materials
DOI10.1016/j.matlet.2020.128667
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000581134200057
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/141275
Collection中国科学院金属研究所
Corresponding AuthorQi, Yang
Affiliation1.Northeastern Univ, Sch Mat Sci & Engn, Inst Mat Phys & Chem, Shenyang 110819, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Peoples R China
Recommended Citation
GB/T 7714
Dai, Bushi,Li, Jinyang,Wang, Weizhen,et al. Carbon fibers with eddy current loss characteristics exhibit different microwave absorption properties in different graphitization states[J]. MATERIALS LETTERS,2020,281:4.
APA Dai, Bushi,Li, Jinyang,Wang, Weizhen,Liu, Xiaoguang,Qi, Yujie,&Qi, Yang.(2020).Carbon fibers with eddy current loss characteristics exhibit different microwave absorption properties in different graphitization states.MATERIALS LETTERS,281,4.
MLA Dai, Bushi,et al."Carbon fibers with eddy current loss characteristics exhibit different microwave absorption properties in different graphitization states".MATERIALS LETTERS 281(2020):4.
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