Remarkable temperature sensitivity of partially carbonized carbon fibers with different microstructures and compositions
File(s)
Published version
OA Location
Author(s)
Liu, Zijin
Wang, Jun
Li, Chang
Zheng, Cheng
Zhang, Bin
Type
Journal Article
Abstract
In order to explore effect of structure on the temperature sensitivity of partially carbonized carbon fibers, different heat treatment temperatures (700, 750 and 800 °C) and heat treatment times (3 and 9 min) were used to prepare fibers with different structures. The electrical resistivities were monitored whilst the room temperature was increased from 30 to 100 °C, which was used to characterize the temperature sensitivity. The fibers showed negative temperature coefficients in the temperature range. Infrared spectra, an element analysis, a scanning electron microscope (SEM), Raman spectroscopy and X-ray diffraction measurements were used to study the microstructure of the fibers. Through the analysis, the proportions of the graphite-like structure, graphitization degree and size of the graphite-like structure crystallite influenced the temperature sensitivity. The main electron transfer method used for the fibers was variable-range hopping. This indicated that the fibers had a potential application of preparing thermistors in polymer composites.
Date Issued
2021-11-22
Date Acceptance
2021-11-20
Citation
Materials, 2021, 14 (22)
ISSN
1996-1944
Publisher
Taylor and Francis
Journal / Book Title
Materials
Volume
14
Issue
22
Copyright Statement
© 2021 by the authors.
Licensee MDPI, Basel, Switzerland.
This article is an open access article
distributed under the terms and
conditions of the Creative Commons
Attribution (CC BY) license (https://
creativecommons.org/licenses/by/
4.0/).
Licensee MDPI, Basel, Switzerland.
This article is an open access article
distributed under the terms and
conditions of the Creative Commons
Attribution (CC BY) license (https://
creativecommons.org/licenses/by/
4.0/).
License URL
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000725450800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Physics, Applied
Physics, Condensed Matter
Chemistry
Materials Science
Physics
carbon fibers
temperature sensitivity
graphitized-like structure
conductive mechanism
ELECTRICAL-CONDUCTIVITY
MECHANICAL-PROPERTIES
POLYACRYLONITRILE
PYROLYSIS
EVOLUTION
Publication Status
Published
Article Number
ARTN 7085