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Synthesis of SiC nanowhiskers from graphite and silica by microwave heating

S.M. Kahar
S.M. Kahar
, 
C.H. Voon
C.H. Voon
, 
C.C. Lee
C.C. Lee
, 
U. Hashim
U. Hashim
, 
M.K. Md Arshad
M.K. Md Arshad
, 
B.Y. Lim
B.Y. Lim
, 
S.C.B. Gopinath
S.C.B. Gopinath
 and 
W. Rahman
W. Rahman
   | Dec 17, 2016
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Published Online: Dec 17, 2016
Page range: 770 - 779
Received: Feb 03, 2016
Accepted: Sep 03, 2016
DOI: https://doi.org/10.1515/msp-2016-0101
Keywords
© 2016 Wroclaw University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Setup for sample preparation inside the microwave cavity.
Setup for sample preparation inside the microwave cavity.

FESEM images of the mixtures of graphite and silica in the ratio of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7 after subjecting to microwave heating. Orange circle: SiO2 unreacted, blue circle: SiCNWs and red circle: unreacted graphite.
FESEM images of the mixtures of graphite and silica in the ratio of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7 after subjecting to microwave heating. Orange circle: SiO2 unreacted, blue circle: SiCNWs and red circle: unreacted graphite.

XRD patterns of SiCNW synthesized by microwave heating of the mixtures of SiO2 and graphite in the ratios of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7.
XRD patterns of SiCNW synthesized by microwave heating of the mixtures of SiO2 and graphite in the ratios of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7.

EDX spectra of the SiCNWs synthesized by using microwave heating from the mixtures of SiO2 and graphite with the ratios of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7.
EDX spectra of the SiCNWs synthesized by using microwave heating from the mixtures of SiO2 and graphite with the ratios of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7.

FT-IR spectra of SiCNWs synthesized using the microwave heating from the blend of SiO2 and graphite in the ratio of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7.
FT-IR spectra of SiCNWs synthesized using the microwave heating from the blend of SiO2 and graphite in the ratio of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7.

PL spectrum of SiCNWs synthesized using the microwave heating from the mixture of SiO2 and graphite in the ratio of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7.
PL spectrum of SiCNWs synthesized using the microwave heating from the mixture of SiO2 and graphite in the ratio of (a) 1:1; (b) 1:3; (c) 1:5 and (d) 1:7.

TGA curves obtained by microwave heating of SiCNWs synthesized from the mixtures of SiO2 and graphite in the ratios of (a) 1:3 (weight loss 6 %); (b) 1:1 (weight loss 8 %); (c) 1:5 (weight loss 45 %); (d) 1:7 (weight loss 65 %).
TGA curves obtained by microwave heating of SiCNWs synthesized from the mixtures of SiO2 and graphite in the ratios of (a) 1:3 (weight loss 6 %); (b) 1:1 (weight loss 8 %); (c) 1:5 (weight loss 45 %); (d) 1:7 (weight loss 65 %).

Interaction of microwave with graphite leading to dielectric heating of graphite.
Interaction of microwave with graphite leading to dielectric heating of graphite.

Formation of a whisker by VS mechanism.
Formation of a whisker by VS mechanism.

Schematic of SiCNWs growth from reaction of SiO and CO vapor.
Schematic of SiCNWs growth from reaction of SiO and CO vapor.
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Language:
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Journal Subjects:
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