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Carbon fibers with eddy current loss characteristics exhibit different microwave absorption properties in different graphitization states
Dai, Bushi; Li, Jinyang; Wang, Weizhen; Liu, Xiaoguang; Qi, Yujie; Qi, Yang
2020-12-15
Source PublicationMATERIALS LETTERS
Volume281
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.
DOI10.1016/j.matlet.2020.128667
WOS IDWOS:000581134200057
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82303
Collection中国科学院金属研究所
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.
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.
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).
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