Open AccessMicrowave-assisted heating behavior of amorphous SiC fibers derived from polycarbosilane
Author(s) -
Young Jun Joo,
Kwang Youn Cho
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abed0e
Subject(s) - materials science , microwave , polymer , composite material , pyrolysis , amorphous solid , thermal conduction , melting point , microwave heating , raman spectroscopy , chemical engineering , optics , crystallography , chemistry , physics , quantum mechanics , engineering
In this study, polymer-derived SiC fibers fabricated using low-melting point PCS (polycarbosilane) were prepared in a mat shape for application as a microwave-assisted heating element. In addition, polymer-derived SiC blocks of various shapes were prepared under the same conditions to verify the heating behavior under the microwave. As a result, the polymer-derived SiC generated more than 1500 °C of heat in tens of seconds under the microwave. The polymer-derived SiC also exhibited different microwave-assisted heating behavior and maximum heating temperature depending on its shape. This microwave heating behavior meant that polymer-derived SiC was more dependent on the conduction loss mechanism than the dipolar loss mechanism. Therefore, as the pyrolysis temperature increased, the pi-electrons needed for the conduction loss were observed by Raman analysis and showed a tendency similar to the heat-generating behavior as the pyrolysis temperature increased.