TY - JOUR
T1 - Growth of SiC whiskers by carbothermal reduction of mesoporous silica-carbon composites infiltrated with SiC nuclei
AU - Wang, Kun
AU - Cheng, Yi Bing
AU - Wang, Huanting
PY - 2009
Y1 - 2009
N2 - Mesoporous C-SiO2 nanocomposite with a low C/SiO2 molar ratio was infiltrated with polycarbosilane (PCS) which is a preceramic precursor for silicon carbide. Different silicon carbide nanostructures were synthesized by carbothermal reduction of mesoporous C-SiO2 nanocomposites via different heat treatments. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption analysis were used to characterize C-SiO2 nanocomposites and SiC products. SiC was not formed in the mesoporous C-SiO 2 nanocomposites without PCS at 1450°C. However, when it was infiltrated with PCS to allow a conversion of PCS into SiC nuclei in the mesopores during the heat treatment, highly crystalline SiC nanofibers and nanoparticles were produced.
AB - Mesoporous C-SiO2 nanocomposite with a low C/SiO2 molar ratio was infiltrated with polycarbosilane (PCS) which is a preceramic precursor for silicon carbide. Different silicon carbide nanostructures were synthesized by carbothermal reduction of mesoporous C-SiO2 nanocomposites via different heat treatments. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption analysis were used to characterize C-SiO2 nanocomposites and SiC products. SiC was not formed in the mesoporous C-SiO 2 nanocomposites without PCS at 1450°C. However, when it was infiltrated with PCS to allow a conversion of PCS into SiC nuclei in the mesopores during the heat treatment, highly crystalline SiC nanofibers and nanoparticles were produced.
KW - Carbothermal reduction
KW - Mesoporous
KW - Preceramic precursor
UR - http://www.scopus.com/inward/record.url?scp=72449184663&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:72449184663
VL - 45
SP - 10
EP - 12
JO - Journal of the Australian Ceramic Society
JF - Journal of the Australian Ceramic Society
SN - 2510-1560
IS - 1
ER -