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Materials Science-Poland
Volume 34 (2016): Numero 4 (December 2016)
Accesso libero
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
e
W. Rahman
W. Rahman
| 17 dic 2016
Materials Science-Poland
Volume 34 (2016): Numero 4 (December 2016)
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CONDIVIDI
Pubblicato online:
17 dic 2016
Pagine:
770 - 779
Ricevuto:
03 feb 2016
Accettato:
03 set 2016
DOI:
https://doi.org/10.1515/msp-2016-0101
Parole chiave
microwave heating
,
silicon carbide nanowhiskers
,
graphite
,
silica
© 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.
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.
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.
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 %).
Interaction of microwave with graphite leading to dielectric heating of graphite.
Formation of a whisker by VS mechanism.
Schematic of SiCNWs growth from reaction of SiO and CO vapor.